Current housing and construction practices rely heavily on the use of conventional red bricks. However, the current building industry is attempting to permanently replace red bricks with concrete blocks. Concrete blocks have been gaining popularity as a building material because of its many benefits. One can save the environment and save money on the cost of creating his or her dream home by using this eco-friendly building material. Building with concrete blocks has simplified and sped up the process of constructing homes. Concrete blocks serve a wide variety of building needs, and as such, there are many varieties available. Concrete blocks come in a wide variety of densities and strengths, but AAC blocks, also known as lightweight blocks, are especially useful for constructing sturdy buildings while keeping their overall weight down. So, when it comes to non-load-bearing construction, AAC blocks are preferred over traditional alternatives. In Bangladesh, people are beginning to see that AAC blocks may be used instead of more expensive and less environmentally friendly materials without sacrificing quality.

AAC Blocks: An Affordable Greener Alternative 

AAC blocks, or Autoclaved Aerated Concrete, are a modern type of building material. Raw materials such as quartz sand, calcined gypsum, lime, portland cement, water, and aluminum powder are combined to form AAC blocks, which are then precast as foam concrete for sustainable construction. Aluminum interacts with cement, lime, and fly ash in a calculated ratio to produce this. The robust cell structure of AAC is the result of hydrogen gas escaping and creating millions of small air cells.  The air content of this particular sort of concrete block is around 80%. Curing it in an autoclave at high temperature and pressure is how it gets its special strength after the first mixing and shaping. AAC lightweight blocks are permeable, non-toxic, and recyclable due to their density of 550–650 kg/m3. Concrete is molded and cut into masonry blocks or planks and panels in the facility where it’s made. Blocks made with AAC material are in great demand because of their excellent performance and longevity, as well as their high strength, load-bearing, and thermal insulation capabilities.

In 1920, a Swedish architect came up with the idea for AAC Block. He was looking for an alternative to wood that had similar properties to wood, like good thermal insulation, a solid structure, and being easy to work with, but without the problems of being flammable, rotting, and being damaged by termites. AAC works effectively in high-rise structures and can withstand wide temperature fluctuations. As a result of its reduced density, AAC-built structures may use less steel and concrete for their framework. Because there are fewer seams between AAC blocks, less mortar is required during installation. The exact sizes of AAC imply less rendering material is needed. AAC manufacturers make blocks of varying sizes and strengths. However, they are often 8-9 times larger than a standard red clay brick while still having superior compressive strength and weighing only a fraction of what a standard brick would. Buildings, both indoors and out, may benefit from the versatility of AAC blocks. AAC may be utilized in structures dealing with extreme heat since it retains less heat. In addition to saving time and money, this method of construction also removes the need for additional insulating materials.

Advantages of AAC Blocks

• Affordability and Sustainability 

Manufacturing AAC blocks results in minimal byproducts since they use only natural, non-toxic components. Moreover, recycling and conversion to aggregate can be done for some of the wastes and residues produced, making it an eco-friendly choice. Its non-biodegradable composition ensures the structure’s long life and resistance to moisture-related damage. Due to its low weight, low energy consumption, and ease of installation, AAC blocks need less manpower overall and thus save money.

• Lightweight and Earthquake Resistance

An AAC Block has a density of 550-650 kg/m3, or roughly a third that of a traditional red brick. Due to its uniquely crafted cellular structure, AAC blocks are 30% lighter than concrete while being 3–4 times lighter than bricks. So with this smaller dead load, it’s possible to construct higher structures. The foundation and construction investment costs are minimized by around 27% and the total project cost is reduced by 5% due to the lower effective dead load. To a certain extent, a building’s susceptibility to earthquake damage is directly related to its weight. Due to its lightweight nature, AAC blocks mitigate the effects of natural disasters like earthquakes and high winds.

• Thermal Insulation and Fire Resistance

One of the most significant advantages of AAC blocks is their ability to insulate against heat transfer. They are equipped with many minuscule air vents all over their structures. As a result, it functions quite well as an insulator. So, throughout the winter months, the interior stays warm and cozy, while during the warmer months, the room stays cool and serene. As a consequence, AAC blocks drastically cut down on monthly costs for air conditioning. In addition, these blocks can withstand temperatures of up to 1,200 degrees Celsius for up to six hours without catching fire, which is far higher than the fire resistance of other common construction materials. This means it is also beneficial for preventing fires from happening.

• Moisture Resistance and Pest Resistance

Moisture can cause extensive damage to a building. Low water absorption is guaranteed by the macro-pores found within AAC blocks. Open pores that create a capillary tube contribute to permeability, whereas in AAC blocks, the millions of closed air holes within vary in size from 2 to 4 millimeters,  efficiently blocking water permeability. These blocks have a permeability resistance that is around 85% greater than that of walls made of clay bricks. In this way, they offer superior protection against moisture. In addition, because AAC blocks are made from inorganic substances, they are resistant to the infestation of common pests like termites and rats.

• Acoustic Insulation

AAC blocks provide a high level of sound insulation because of their lightweight and porous construction. Since the AAC block’s inside is studded with so many small air holes, it negates noise and echoes very well. A great material for use in the building of walls in auditoriums, hospitals, offices, and schools as it provides sound attenuation of around 40-50 dB and filters out all severe sounds and disturbances.

• Better Return on Investment

Substantial turnaround on invested capital as a result of a reduction in construction time and related expenses (such as cement, steel, construction supervision fees, water, and lumber needed for centering and shuttering). The surface of AAC Blocks is smooth and uniform thanks to their wire cutting. Because of this, the cost of plastering interior walls may be avoided by having them immediately put and painted.  When used in large construction projects, they can cut transportation and handling expenses by 30–40%. Incredibly user-friendly and straightforward to set up. Shortens construction time by over 20%. When compared to traditional red bricks, AAC blocks use far less mortar when being joined together, resulting in significant savings.

Disadvantages of AAC Blocks

• Not Suitable for Load-Bearing

Because of the hundreds of air holes inherent to its structure, AAC blocks are very lightweight. Therefore, AAC Block may only be utilized in framed or partitioned constructions where it does not have to support any weight. Therefore, they can’t be utilized in structural walls. Load-bearing walls should ideally be constructed with dense, solid blocks.

• Brittle in Nature

The AAC blocks are more fragile than regular brick because of the porosity inside the substance. They require more attention during installation than clay bricks to prevent cracking. It is necessary to use wood-suitable drill bits or hammer for longer, thinner screws due to the blocks’ brittleness while assembling cabinets and hanging wall decorations.

• Prone to Cracks

Cracking is a common problem after installing AAC blocks, which is why they are sometimes avoided. This may be prevented by weakening the mortar’s strength and ensuring that the blocks are dry before, during, and after the installation process.

• Plastering issue

As a result of the smooth texture of the AAC block’s surface, plaster may have difficulty adhering to certain surfaces. It is essential that during the production process, enough precautions be taken to prevent the surfaces of the AAC blocks from becoming too smooth.

• Unfamiliarity among Contractors

A great number of contractors are unfamiliar with AAC blocks, and those that are aware of them lack the qualified labor necessary to work with AAC blocks. There are even those who are reluctant to work with modern forms of material like AAC blocks. Because the mortar used for AAC is thinner in comparison to traditional cement-based mortar, they frequently need to hire specialized laborers in order to get the job done.

Summary

AAC blocks, also known as lightweight blocks, are advantageous because their porous structure makes them resistant to fire and high temperatures while still being lightweight, eco-friendly, and sustainable. However, their brittleness, load-bearing limitations, susceptibility to cracks, etc., limit their usefulness in a variety of construction contexts. Yet, it has the potential to become a widely used building material because of its exceptional workability, flexibility, and durability in contemporary contexts.

F.A.Q.

How can you fix a cracked wall made of AAC blocks?

Ans. To repair cracks in AAC block walls and plaster, use a crack filler mortar designed specifically for this purpose.

Should you plaster over AAC blocks?

Ans. The surface of AAC blocks is flat and wire-cut. Plastering is unnecessary for interior walls for this reason. It’s now possible to paint or patch the walls immediately. Plastering the outside, however, is necessary.

Is it better to use AAC blocks than bricks?

Ans. When compared to bricks, AAC blocks are superior because they are eco-friendly, lightweight, strong, uniform in size and shape, simple to install, and inexpensive to build with. This is in contrast to the fact that the production of bricks contributes to pollution by releasing harmful gasses into the atmosphere.

Why do AAC blocks get cracks?

Ans. Deflection of the beam, uneven positioning of AAC blocks, the structural movement induced by thermal expansion, or change in moisture content is all potential causes of cracking in concrete blocks during installation.

Can I tile over AAC concrete blocks?

Ans. The answer is yes. You may tile over AAC blocks with thin-set adhesive.

Concrete blocks, a general name for concrete masonry units (CMU), have gained popularity over the last few decades as the main construction unit, replacing conventional red bricks. The concrete block industry is experiencing rapid growth as the government has decided to ban the production of redbricks within the next three years. The dominant factors behind this scenario can be described as the cost-effective and eco-friendly characteristics of concrete blocks.

Profitable pricing of a product in response to rising demand is a goal shared by a market’s producers and its consumers. Typically, the market price of a product is determined by the quantity of supply and consumer requirements. As concrete block production has already seized a large share of the construction materials manufacturing market, it is apparent that its pricing is one of the key factors that are working behind this scene. The current market scenario represents an affordable price for concrete blocks in comparison to conventional masonry units, and this has fueled the increasing demand among consumers. Concrete blocks are less expensive solutions with better output for any construction project. To get an overview of the concrete blocks’ prices and the market statistics, just go through this article! If you have any query that is not answered in this article, experts from Mir Concrete Block are always here to help!

Types of Concrete Blocks Available in the Market

Concrete itself is a versatile material that has been used to build multipurpose infrastructures since ancient times. Blocks made of concrete have similar potential to be utilized in a variety of manners. Concrete blocks are found in various shapes and sizes and are manufactured according to specific usability. But there are mainly two primary categories of concrete blocks, and they are:

1. Solid concrete blocks 
2. Hollow concrete blocks 

Both solid and hollow blocks include a wide range of blocks of different shapes made for specific requirements, such as fly ash blocks, paving blocks, lightweight blocks, stretcher blocks, lintel blocks, etc. All types of concrete blocks are used to construct walls and buildings, as well as numerous decorative infrastructures. Follow these guidelines to know how to choose the type of concrete block required for your project.

Factors Affecting the Price of Concrete Blocks

Not all manufacturers put the same price tag on a similar product. However, the difference between prices can never be extensive because of market competitiveness. There are some key factors that control the price range of a product, and in the case of concrete blocks, these factors include:

Size and weight

Concrete blocks’ size and weight differ according to the requirements of the construction project. Usually, the standard size of a hollow block is 390×190×100 mm, and it weighs about 10–11 kg. A solid block’s standard size is typically 240×107×70 mm, and it weighs around 3.70 kg. But different projects require different sizes and weights of concrete blocks, and usually, these are custom-made by manufacturers. The price of the concrete blocks is directly proportional to the approximate size and weight of the blocks. The larger and heavier the block is, the more expensive it will be.

Quality of raw materials

The concrete blocks are typically made of cement, aggregates, and water. The quality of these raw materials controls the strength and durability of a concrete block. The quality of these raw materials can be determined by some indicators. Such as, cement used for concrete blocks manufacturing cannot have lumps, hardens early and must be moisture-resistant. The aggregates must be non-porous, chemically inert, and strong. The quality of water used for concrete block production must be the same as potable water. 

Every manufacturer is legally bound to do all the quality assurance tests before launching their concrete block products. However, the quality of these raw materials differs from manufacturer to manufacturer, and the price is fixed primarily based on the raw materials’ price. If a manufacturer company does not compromise on quality and chooses the best materials on the market, they will be a bit high on prices compared to other producers. 

Machinery and manufacturing procedures

Different companies apply different types of machinery and technologies for their concrete block production. The price also depends on how expensive their production processes and machinery are. The latest manufacturing technology with a sustainable air purification process is a must right now, and by ensuring that, manufacturers add value to their products. The technology used in manufacturing vastly controls the concrete product’s quality and efficiency; efficiency also determines its price.

Transportation costs

The price of concrete blocks depends on the distance between production plants and the area of the construction project too. Usually, masonry units are ordered in bulk, and then they have to be transported to the site of construction. The cost of transportation is added to the price respectively. 

Compressive strength

Compressive strength is one of the major characteristics of concrete blocks and the main indicator of the strength of the infrastructure. The Compressive strength of a concrete block is defined as the ability to withstand compression stresses applied to its surface. The amount of pressure a concrete block can endure before it breaks determines the value of its compressive strength. Compressive strength indicates how strong the infrastructure made of concrete blocks will be. This characteristic greatly depends on the quality of raw materials and manufacturing procedures. Producers have to mention the tested compressive strength of their concrete block products before making a deal with the customer. Therefore, the price range varies depending on the strength of the concrete block. 

Solid Block Price in Bangladesh

Solid concrete blocks typically range in price from BDT 12-16. Two colored solid blocks are found on the market: gray and red-colored. The gray one costs from 12 to 14 BDT and the red one costs from 14 to 16 BDT. However, this price range is applicable to only the standard-sized blocks and is also dependent on the factors mentioned above. If the size and weight of the blocks are customized, they will cost accordingly. 

Hollow Block Price in Bangladesh

Hollow blocks come in different shapes and sizes according to their application for construction projects. The price range depends on such factors as size, weight, and all the others mentioned earlier. In Bangladesh’s market, standard-sized hollow blocks will cost between BDT 33 and BDT 39 per block. The price will change according to their size and weight for specific projects. 

Type of Concrete Blocks		Lowest Avg. Price	Highest Avg. Price
Solid	Grey Block	12 BDT	14 BDT
	Red Block	14 BDT	16 BDT
Hollow	90mm Block	33 BDT	35 BDT
	100mm Block	35 BDT	37 BDT
	140mm Block	37 BDT	39 BDT

Table: Average Market Price of Concrete Blocks in Bangladesh

Red Bricks vs. Concrete Blocks: Comparison of Prices

For ages, red bricks have been used as construction units for the exterior walls of buildings. Concrete block is in the process of overtaking that place for the last several years because of its sustainability and cheaper price range. 

Among the two primary types of concrete blocks, solid blocks cost a little bit higher than red bricks, whereas hollow blocks are way more cost-effective than red bricks. The price of red bricks in Bangladesh ranges from 8–10 BDT. Solid concrete blocks cost 12-16 BDT and hollow blocks cost 33-39 BDT. The standard size of a solid block is exactly the same as the standard size of red brick, and a single hollow block equals almost the size of five red bricks. Therefore, comparing the price of two types of blocks to that of red bricks, hollow blocks are the best option to go for. Solid blocks may be a bit higher in price but the durability they would provide compared to red bricks will make up for it, undoubtedly.  

Summary

The market valuation of concrete blocks depends on several key components that include their size, weight, compressive strength, raw materials, types of machinery, transportation, etc. In comparison to conventional red bricks, the price of hollow concrete blocks is less costly and more efficient. The solid blocks range in price a bit higher than bricks, but the strength and durability make the customers favor them over bricks. Not only are concrete blocks cheaper, they are also the most eco-friendly construction material available at present. It is highly recommended to use concrete blocks instead of red bricks for better infrastructure and, largely, for a cleaner environment and future. 

F.A.Q.

What is the price of red bricks in Bangladesh? 

Ans. Red bricks range in price from 8 to 10 BDT in Bangladesh. 

Why has the government of Bangladesh decided to ban red brick kilns from 2025?

Ans. Red brick manufacturing produces harmful byproducts that contribute greatly to air pollution, ozone layer depletion, and global warming. That is why the government has taken the initiative to cease this hazardous effect by banning the use of red brick. 

What is the price of hollow blocks in our country? 

Ans. The current market price of hollow concrete blocks ranges from 33 to 39 BDT per block. 

How much does a solid concrete block cost in Bangladesh? 

Ans. A solid concrete block costs about 12–16 BDT based on the color of the blocks and other key factors like size, weight, strength, etc.

Where can I purchase good-quality concrete blocks?

Ans. Mir Concrete Block provides the best quality concrete blocks in Bangladesh. They ensure the top-notch quality of their products as well as their services. Without a doubt, you can choose Mir for building your dream home!

Concrete masonry units (CMU), commonly known as concrete blocks have gained popularity over conventional red bricks over the last decade in our country. The usage of concrete blocks is on the rise and gradually taking up the market replacing traditional bricks. The flourishing demand for this masonry unit is not at all surprising. Rather, the sooner it replaces our traditional brickworks, the better it is for our environment. There are basically two dominant factors behind this increasing popularity: concrete blocks are cheaper, in fact, 20% cost saving with respect to bricks, and eco-friendlier alternatives.  Brick manufacturing kilns generates hazardous byproducts that have contributed to air pollution and ozone layer depletion leading to global warming. Without a doubt, it is high time we found sustainable alternatives for these environmental hazards, and therefore, concrete blocks are the best choice at hand. Our government has also taken the wise decision of banning the use of traditional bricks by 2025, fuelling the already mushrooming CMU industry. 

Aside from the existing major concrete block manufacturers, former brick-field owners and new entrepreneurs are also opting for manufacturing concrete blocks. So, it is apparent that the concrete blocks manufacturing industry has grabbed a major share of the current market. The brick industry of Bangladesh is worth over BDT 90 billion, from which concrete block manufacturers have already seized a share of the market nearly amounting to BDT 2 billion. Among all the Lightweight block manufacturers of Bangladesh, a few leading companies including Mir, Concord, Bti, and Meghna, have already taken up 20% market share in their possessions. 

Considering the advantages CMU has over conventional bricks, all property owners should opt for concrete blocks for their construction projects. To make an informed decision before purchasing, it is crucial to have a basic knowledge of the top Bangladeshi producers of concrete blocks. This article’s main goal is to help you decide where to get the best concrete blocks for your construction projects.

Lightweight Concrete Block Manufacturers of Bangladesh
SL NO.	Concrete Block Company Name
1	Mir Concrete Block
2	Concord Concrete Block
3	BTI Building Products
4	Meghna Concrete Block
5	Property Development Limited
6	Rupshi Concrete Products (RCPL)
7	Master Concrete Block

Mir Concrete Block

Mir Concrete Block started its journey in 2004 as a division of Mir Concrete Products Limited (MCPL).  Mir Group of Companies has established excellence in each of its endeavors since its founding in 1968, and this division, Mir Concrete Block, is no exception. With an objective to produce eco-friendly and comprehensive construction materials, Mir Concrete Block has outstood its purpose profoundly. This business unit specializes in the manufacturing of global standard concrete hollow blocks, paving blocks, unglazed paving/parking tiles, etc. The entire unit is dedicated to introducing the latest technologies and their implementation in the construction sector to elevate our conventional processes to international standards. With this mission, Mir Concrete Block has two manufacturing plants for all its operations in two prime industrial locations in the country: Gabtoli, Dhaka, and Rupganj, Narayanganj. Staying more than 15 years in business, Mir Concrete Block has introduced over 50 new construction products and completed more than 2000 projects under its umbrella. 

Mir Group, being one of the pioneers of introducing concrete blocks to our construction procedures, has contributed to maintaining eco-friendliness and durability in the construction procedures. The key element for their success has always been their customers’ faith and confidence. Mir has always prioritized its customer experiences by offering high-standard products and services and on-time delivery. So, if you are in confusion which manufacturer to choose for buying your construction materials, think no more and go with Mir Concrete Blocks. You can never go wrong by choosing Mir, rather wait to be amazed at every turn.

Concord Concrete Block 

Concord group is one of the oldest and largest conglomerates in Bangladesh being in business for over 47 years. Concord group has a wide range of sectors including real estate, engineering, and construction, construction materials manufacturing, etc. Concord concrete block is a subdivision of their construction materials manufacturing sector. Concord has four factories at present dedicated to the manufacturing of concrete masonry units and other concrete products. Their largest concrete block manufacturing plant is located at Anarpura, Gazipur where the latest technology is implemented to produce high-quality lightweight concrete blocks. A Besser V-3 Vibrapac machine is utilized to produce concrete blocks and this machine can manufacture up to 4,320,000 blocks annually. This multipurpose machine is also used to produce other concrete products such as pavers, tiles, etc. Their entire Lake City project was built with their own manufactured concrete products and many other projects are under construction.  Concord takes pride in delivering solutions to all challenging projects and earning their consumers’ full satisfaction. 

BTI Building Products

Building Technologies and Ideas (bti) is a renowned real estate company in Bangladesh that has been in business for over four decades. Aside from real estate and property management services, bti started its venture of manufacturing construction materials with the name bti Building Products. Their manufacturing operations primarily focus on concrete hollow blocks, solid concrete bricks, uni pavers, and pavement tiles. bti has been one of the largest manufacturers of concrete blocks in our country since 2011 when they introduced their concrete hollow blocks with an aim to bring a sustainable alternative to construction projects. They operate all their manufacturing procedures in bti Building Block Factory situated in Joypura, Dhamrai covering over an area of 5 bighas. Their portfolio includes numerous completed projects such as Alpenglow, Centara Grand, The Floret, Roselyn, Lake View, Sunflower, etc. utilizing their concrete hollow blocks and other building products. bti has secured their position as one of the top manufacturers of concrete blocks in our country by maintaining consistency and introducing innovative ideas. The initial product of their division, bti Building Products, was concrete hollow blocks, and they have gradually expanded their product line as a result of their customers’ trust in them. 

Meghna Concrete Block

Meghna Concrete Block is an industrial division of Meghna Group of Industries, one of the largest leading conglomerates in Bangladesh. Meghna Group of Industries was established in 1976, under the name of ‘Kamal Trading Company’ which later on adopted the name ‘Meghna Group of Industries’ in 1989. Meghna Group of Industries is well-known for manufacturing diverse products that include fast-moving consumer goods (FMCG), building materials, concrete blocks, pulp and paper, LPG, chemicals, shipbuilding products, aviation, etc. Among the vast selection of products, Meghna concrete block has gained popularity over the last decade since its inception. Meghna’s concrete block unit is named Sonargaon Green Concrete Bricks and Blocks which constitutes a few lightweight concrete block manufacturing factories. Their block and bricks unit operates with the vision to reduce the usage of red bricks, which is hazardous to the ecosystem. With this objective, they have modified their manufacturing technology as well as structural design, specifications, and maintenance and ensured hi-tech performance in every aspect. Their products include solid concrete bricks, concrete hollow blocks, curb stones, paved tiles, etc. that come with the opportunity of customization of sizes. Meghna has shown integrity and reliability since its beginning and can be considered a trustworthy choice for your concrete blocks purchasing requirements.

Property Development Limited (PDL)

Property Development Limited is a sister concern of PRAN-RFL Group and started their business in March 1983. PDL Concrete Block is a popular sub-division of PDL group which focuses on delivering high-quality and cost-efficient concrete masonry units. PDL Concrete Blocks offer a wide range of concrete masonry units created with durability and strength. Their products include hollow blocks, concrete solid blocks, double interlock blocks, uni-pavers blocks, hexagonal blocks, curbstone blocks, rectangular pavers blocks, saucer drain blocks, erosion control blocks, cube blocks, pavement tiles, etc. Utilizing their construction materials, PDL has already accomplished to complete several renowned projects that include the Payra bridge, Dhaka-Mawa Expressway (N-8), RFL ETP (Danga Industrial Park), and Bangabhabon pipeline, Vanga intersection, PRAN warehouse, PRAN agro limited ETP, etc. Many ongoing projects are also under operation such as Lebukhali cantonment, Purbachal 300 feet, Bangabandhu Aviation, KASAVA plant, etc. PDL emphasizes its customer satisfaction and safety over anything else and has earned credibility as a standard concrete block manufacturer.

Rupshi Concrete Products (RCPL)

Beginning their journey in 2000, Rupshi Concrete Products Limited has come a long way in securing their position as one of the top manufacturers of lightweight concrete blocks. Their lightweight concrete blocks manufacturing unit started its voyage in 2011, and for the last 10 years they have striven to provide one of the top quality concrete blocks in Bangladesh. Rupshi Concrete Products primarily manufactures three types of concrete blocks: hollow blocks for wall and ceiling, soft block and erosion control block. They also produce other concrete materials including solid concrete bricks, curb stone, pavers, plunks, saucer drain, etc. They promise high strength, durability and longevity of all of their products and have gained the trust of their clientele. RCPL’s portfolio includes many lucrative accomplishments such as the Mymensingh road improvement project, the Royal Embassy of Saudi Arabia project, SASEC (Joydevpur-Alenga) project, etc. Their factory is located at Murapara, Rupganj, Narayanganj, where all of their manufacturing operations are executed.

Master Concrete Block

Master Concrete Block Manufacturing Company is a sister concern of Master Trade International (MTI) which started its journey way back in 1986. MTI is a leading chemical trading corporation in Bangladesh, operating for over three decades. Master Concrete Block is their latest wing, being in the business for nearly one decade. Master Concrete Block specializes in manufacturing standard quality lightweight concrete solid blocks, hollow blocks, ceiling blocks, curb stones, uni pavers, grass pavers, and embankment protection blocks. Acknowledging the harmful effects brick kilns have on our ecosystem and ozone layer, Master Concrete Block began their journey with an ambition to save the agricultural and environmental sectors by producing sustainable construction alternatives. Their concrete block manufacturing factory is located in Narayanpur, Belabo, Narsingdi by the side of Dhaka-Sylhet highway upon 04 (Four) acre land. They have implemented ASTM C-140 technology with PLC-controlled Siemens machines for their concrete block production procedures, as an eco-friendly solution for replacing burning bricks in kilns. In this technology, no natural gas or wood/coal is used as fuel, and therefore, ecologically harmful byproducts such as carbon monoxide, carbon dioxide, etc. are not produced. Master Concrete Block Manufacturing Company has achieved popularity for their sincerity and constant improvement, which has made them one of the most dependable lightweight concrete block manufacturers in our country at present.

Summary

The concrete block industry has been booming for the last ten years and the list of Lightweight Block Manufacturers of Bangladesh is also growing simultaneously. As a result, there are many options available in the market when buying concrete blocks for construction purposes. More people are interested in investing in properties and real estate at present, leading to an increase in building projects. Market knowledge is necessary when purchasing construction materials and an overview of the leading manufacturers is quite significant. Mir, Concord, Meghna, bti, PDL, and many other Lightweight concrete block-producing companies are offering quality products to make a choice from. The competitive market is also a good indication of industry growth and increasing demand for this sustainable product. 

F.A.Q.

Why is concrete block replacing traditional bricks gradually as construction units?

Ans. The main reason behind choosing concrete blocks over bricks by the majority is that it is an eco-friendlier and cheaper alternative. 

How big is the brick industry in Bangladesh? 

Ans. The current market size of the brick industry in Bangladesh is over 90 billion BDT.

Where can I buy high-quality concrete blocks? 

Ans. Many manufacturers are providing good quality concrete masonry units at present including Mir Concrete Block. You can contact us for any information regarding your purchasing needs anytime at Mir and we’ll be there to help!

How many types of concrete blocks are available in the market? 

Ans. Hollow blocks, solid blocks, paver blocks, erosion control blocks, double interlock blocks, curbstone blocks, saucer drain blocks, etc. are the main categories of concrete blocks available in the Bangladeshi market.

Is concrete block safer as the alternative to bricks? 

Ans. Infrastructures built with concrete blocks are less susceptible to moisture and more earthquake-resistant than traditional brick-built infrastructures, making concrete blocks a safer alternative than bricks.

A concrete block is a type of building block composed completely of concrete that is linked together with mortar for the construction of walls. Instead of bricks as a construction material, concrete blocks can be used as masonry units. For this reason, it’s also known as the concrete masonry unit (CMU). The traditional brickwork for the construction of buildings is rapidly being replaced by concrete masonry units over the years for their unique advantages over bricks. There are several reasons why it has become a popular building material in recent years. It is strong and durable, meaning it can withstand a lot of wear and tear. It is also easy to work with, making it a popular choice for building structures that can last for a lifetime. Additionally, the concrete block is fire-resistant and insect-resistant, making it a low-maintenance option for both homes and other structures. Plus, concrete block is a sustainable building material, as it can be made from recycled materials. But most importantly, one of the key factors in its success is its compressive strength. 

What is Compressive Strength?

Concrete block or CMU is one of the most versatile building materials available. It can be used to create foundations, walls, floors, and more. Because of its tremendous compressive strength, it is often considered to be the most durable building material on the market. Compressive strength refers to the amount of pressure that the material can withstand before it breaks, or, in other words, the maximum crushing stress that a concrete block can take. The ability of a concrete block to endure compression stresses applied to its surface is a highly essential physical attribute of this popular construction material. The formula for calculating compressive strength is as follows: Compressive Strength = Applied Maximum Load / Surface Area of the Specimen. For concrete blocks, the compressive strength is typically around 17.5 N/mm2 or 2500 psi. This means that the blocks can support a load of up to 17.5 N per square millimeter before they start to crack. Compressive strength is tested to determine how much compression a concrete block structure can endure. Concrete block compressive strength is hence an essential element of structural designing.

However, there are different types of concrete blocks or CMU used in construction, notably solid or hollow blocks of load-bearing or non-load-bearing categories. Moreover, these hollow or solid blocks can be further categorized into several types according to their density, such as ultralow, light, normal, or high density. Interestingly, depending on their nature, the standard compressive strength can vary from type to type. In addition, as we’ll see in the following section, the standard compressive strength of each kind might vary widely depending on a variety of conditions. As a result, regulatory agencies in each country usually set a standard requirement for compressive strength to guarantee that the concrete blocks meet a specific degree of strength. Because of this, the compressive strength of used concrete blocks is routinely tested at various stages of manufacturing and construction. 

Standard Range of Compressive Strength 

As mentioned in the previous section, the required standard of compressive strength in construction work varies for different types of concrete blocks. Usually, the average compressive strength of concrete blocks ranges from 3.5 N/mm2 to 17.5 N/mm2. The compressive strength of individual types is shown in the table below.

Concrete Block Type	Average Compressive Strength
Ultralow density (Non-load-bearing, Hollow/Solid)	3.5 N/mm2
Light density (Non-load-bearing, Hollow/Solid)	7.5 N/mm2
Normal/Medium density (Load-bearing, Hollow/Solid)	12.5 N/mm2
High density (Load-bearing, Hollow/Solid)	17.5 N/mm2

How is Compressive Strength Determined

Compressive strength refers to a CMU’s capacity to withstand the stresses on its surface without cracking or deflection. It is important to know if these can be used in construction work for different purposes. It is first checked during mix design to make sure that the quality of concrete that was taken into account is of standard quality. The average compressive strength of a concrete masonry block is typically measured using eight blocks. A compressive testing machine, or CTM machine, is used to test the strength of 8 full-size concrete blocks to see how well they hold together. After being collected at the lab, the blocks should be analyzed within three days. Each block will be allowed to cure for 28 days. Compressive strength test equipment has two steel bearing blocks, one fixed and the other moving, which are used to provide the load to the masonry unit when it is put on the fixed block. Separate steel plates are utilized if the bearing area of the masonry unit exceeds the bearing area of steel blocks. The masonry unit centroid and block center of the thrust are aligned with the plates set on steel blocks.

Concrete masonry units are topped with sulfur and granular materials or gypsum plaster. Half of the predicted maximum load is applied continuously once the unit is placed in the testing machine; the remaining load is applied in no less than two minutes. Concrete block compressive strength is determined by dividing the maximum load for a given masonry unit by the unit’s total cross-sectional area. In the same way, test the remaining 7 blocks. The final compressive strength of a  concrete masonry unit, or CMU, is the average of the strengths of all 8 blocks. 

Factors Affecting Compressive Strength of Concrete Blocks

Compressive strength of concrete block depends on various factors such as the mix proportion of concrete, properties of ingredients of concrete, curing time, its physical dimension and how it is loaded (flat or on edge), solid or hollow, wall thickness and height (slenderness ratio), age, temperature, grove cuttings (due to electric and plumbing works), type of mortar and masonry bond type.

Raw material quality 

The compressive strength of concrete blocks vastly depends on the raw materials from which they are constructed. Generally, concrete masonry units are built with three basic compounds: Cement, Aggregates, and Water. The quality of these components will determine how solid the masonry units will be. 

• Cement: The strength of concrete blocks will be equally proportional to the quality of cement. By creating bonds with aggregates in the presence of water, cement forms the concrete particles. While assessing the quality of cement, some key factors must be thoroughly checked. They are:

1. Method of storage
2. Manufacturing and expiration date
3. Strength and shape tests
4. Presence of lumps
5. Consistency testing

• Aggregates: Covering 80% of the volume of the concrete block structure, aggregates are one of the key components that determine the compressive strength of concrete masonry units. Basically, two types of aggregates: fine and coarse aggregates, are present in the making of concrete blocks. The standard of aggregates is determined on the basis of some crucial factors:

1. Particle size and weight
2. Shape and texture
3. Absence of chlorides and sulfates
4. Water content
5. Consistency 

• Water: The quality of water should be maintained according to respective standards for construction purposes. Water catalyzes the bonding of cement particles with aggregates, so the standard quality of water must be maintained for the durability and strength of concrete blocks.

Water/Cement ratio

The compressive strength of concrete blocks is inversely proportional to the water/cement ratio. The higher the ratio is, the lower its strength will be. This relationship can be depicted in the below graph:

The water/cement ratio is an indication of the durability of concrete. A higher water/cement ratio indicates that the initial spacing between cement particles is greater and residual voids are not filled with hydration products in greater volumes. That is the reason behind the lower workability of concrete blocks. The compressive strength of concrete blocks largely depends on keeping this ratio perfect in mixed designs. A few parameters, such as environmental conditions, construction materials, etc., have to be assessed to identify the expected ratio for a particular project to achieve the required strength. 

The quantitative relation between aggregates 

As mentioned earlier, two types of aggregates are present in the concrete mixture: coarse and fine aggregates. The ratio of coarse aggregates to fine aggregates is an important parameter of the compressive strength of concrete blocks. The coarse/fine aggregate ratio indirectly affects the water demand in the mixture, which in turn determines the water/cement ratio, which finally influences the strength of concrete masonry units. If the amount of fine aggregates in contrast to coarse aggregates decreases, the overall aggregate surface area will decrease, and as a result, the water demand will decrease too. More compressive strength may be achieved with less water because of a lower water/cement ratio. So, the coarse/fine aggregate ratio is a significant indicator to be considered while making the mix designs.

Aggregate to cement ratio

Aggregate particles bond with cement catalyzed by water, and this is how concrete blocks are manufactured. For the constant workability and strength of concrete blocks, the value of aggregate: cement is an important measurement. 

While keeping a specific volume, if the ratio of cement is increased in relation to that of aggregates, it will lead to the increase of solid surface area. But for constant durability, the water demand will remain unchanged, leading to a decrease in the water/cement ratio. The reduction of this ratio indicates the higher compressive strength of these masonry units.

Entrapped air 

The amount of entrapped air improves the workability of the concrete block but reduces its compressive strength. This contradictory feature of concrete blocks should be kept in mind as it controls the expected strength. Air voids inside blocks reduce the compressive strength by 5%. Even though air voids resist the damage from freezing, the portion must be kept controlled for expected strength for particular construction purposes.

Concrete compaction

Concrete densification is the process of compacting a concrete block after it has been manufactured. There is a direct correlation between inadequate compaction and weaker concrete masonry units. Compressive strength is directly related to the degree of compactness. Strength decreases due to air pockets that are formed when the material is not compacted properly. For increased strength, concrete blocks must be properly compacted.

Age of concrete

The older the concrete blocks, the stronger they are. Aging has a huge contribution to increasing the compressive strength of concrete. However, after a certain period of time, the increase in strength is negligible; but concrete particles gain strength in an indefinitely constant manner.

Curing time

The curing time of concrete directly controls the increase in compressive strength in CMU. In general, the majority of strength is achieved during the 28th day of its curing period. Nevertheless, curing concrete blocks is an infinite process, and the achieved strength after 28 days is very minimal.

Temperature & relative humidity 

The process of achieving the strength of concrete blocks is vastly affected by temperature and relative humidity. The hydration rate of the concrete block is a good indication of its compressive strength. High temperatures and dry environments speed up the hydration process, resulting in the quick hardening of concrete blocks. When the concrete blocks do not receive adequate time for hardening, the resulting concrete becomes less well-structured and more porous, which is a reason for the decreased compressive strength of CMU. Sufficient moisture content and proper temperature are required to maintain while storing concrete blocks to achieve expected strength.

Summary

Concrete blocks are a smart solution for a wide range of construction projects. Because of the prevalence of high-rise buildings, construction projects now necessitate the use of heavy-duty load-bearing components. Such situations need the use of concrete blocks. Because of its highly practical and useful range of compressive strength, it has been able to outperform red bricks in these kinds of structural constructions. For all of these reasons, it is no wonder that concrete blocks are such a popular choice for both new construction and renovation projects.

F.A.Q.

What is the most important determinant of the compressive strength of concrete blocks?

Ans: The water/cement ratio is the most significant factor in determining the compressive strength of concrete blocks.

What is the compressive strength of concrete blocks?

Ans: A concrete block’s compressive strength is the amount of force it can withstand before it breaks.

How long do concrete blocks take to cure?

Ans: Concrete blocks cure for an infinite period of time. There is no limit to how long concrete blocks may cure. In the first 28 days of curing, the majority of the curing is completed; after that, just a little amount of curing takes place.

Why are concrete blocks prone to water leaks?

Ans: Due to their porous nature, concrete blocks are susceptible to water leaks.

Where can I get concrete blocks in Bangladesh?

Ans: A wide variety of high-quality concrete blocks are made by a number of Bangladeshi producers, including Mir Concrete Block.

Concrete blocks are usually highly porous. Meaning water or other thin liquid can easily pass through concrete blocks. One can quickly notice the spongy appearance of concrete blocks. The small voids on the surface make an easy avenue for any type of moisture to penetrate using capillary pressure and migrate into the concrete blocks. It is crucial to understand the reasons behind the water leakage issue. If the engineers and project managers understand the issue from the core, water leakage in concrete blocks can be stopped completely.

A typical concrete mixture contains powdered Portland cement, sand, gravel, and water. The light concrete blocks are produced using clay, shale, or slate instead of gravel and sand. Hollow concrete blocks, the most common and popular concrete block, contain a void in the block’s interior, which drastically reduces the overall weight of the block. The lighter-weight concrete blocks bring many advantages, such as helping with the installation process. However, they are more prone to water leakage than other concrete blocks.

Degree of Porosity

The degree of porosity of a concrete block depends on several aspects.

• Due to specific requirements of the manufacturer
• Manufacturers may fabricate the available materials and downgrade the quality
• The ratio of Portland cement to water (More water, more permeability)
• Compaction ratio at the plant of the concrete manufacturer

A concrete block typically cures within sixteen to twenty-four hours in the manufacturing process in a high humid atmosphere and at an approximate temperature of one hundred degrees Fahrenheit. Shortly after completing the manufacturing process, concrete blocks are usually delivered to the project site and assembled to create the walls while the curing is still an ongoing process. The average curing period for most concrete blocks is between three weeks to four weeks. During this period, the concrete blocks become vulnerable to developing hairline cracks or creeping cracks. Such cracks are one of the primary ways for water to leak through the blocks.

Leaks at the Flashing

Apart from the concrete block’s composition, there are flashing issues that can cause water leakage in the concrete blocks. Usually, metal or a composite of membrane and runner are used for creating a drainage system and an impermeable water barrier throughout the masonry walls. This flashing system goes through the concrete block. If poor quality material is used in the system, it affects the concrete blocks and eventually downgrades the quality of the concrete blocks. The chemical reaction between the concrete and the metal from the flashing system may create holes in the concrete, which will allow water to seep through.

Honeycomb

Honeycomb is a faulty formation in the structure of concrete blocks. When the curing process is not rightly done, and the process gets corrupted by outside forces, a faulty and porous honeycomb structure is formed. The presence of a honeycomb dramatically enhances the probability of water leakage. Hence, upon discovering, the honeycomb issue should be treated immediately.

Corrupt Coarse Aggregate

If the materials in the mix are corrupted, the quality of the concrete blocks will be below, and they will be prone to water leakage. Coarse aggregate is one of the significant factors in leakage in concrete blocks. If the aggregates are poorly graded, dirt-contained, and more significant in size, the aggregates are considered corrupt. These corrupt aggregates increase the voids in concrete blocks and thereby increase the permeability, which results in water leakage.

Impure Fine Aggregate

If the fine aggregate is impure, the quality of concrete blocks will be at risk. Improper fineness in the fine aggregate will produce more voids in the concrete blocks and leave more holes open for water to leak through. In addition, if pollutants are present in the fine aggregate, more voids will be created during the curing process of concrete blocks. Both coarse and fine aggregates should be adequately moisturized and cleaned before mixing. The aggregates should be in saturated surface dry condition before getting mixed in the plant.

Reinforcement Bars

Old and rusty steel bars, shutter oil, and cement mortar may cause water leakage within the concrete blocks. In addition, over reinforcing may weaken the concrete blocks and leave them for water leakage. At the same time, a low amount of rust can improve the quality of the bond between the concrete and the steel bars. However, over reinforcement or high rust will create steel congestion, and the concrete placement will become extremely tough. Lastly, the concrete may fall at risk of forming honeycombing.

Admixtures

Admixtures are also crucial in water leakage through concrete blocks. If the admixtures are expired or used more than necessary, the concrete blocks will lose their inherent qualities. Moreover, if admixtures are mixed with inappropriate materials, the concrete blocks will react adversely and create open spaces within the blocks and allow water to leak through. Hence, admixtures should be applied according to the overall concrete mix design specifications. The location of the applications should also be kept in mind. To ensure high-quality concrete blocks, experimenting with the dosage and changing the type of admixtures during the process must be avoided.

Cement Type and Mixing Water

The type and quality of cement are significant factors in preparing high-grade concrete blocks. If the wrong type of cement is used or the quality of cement is poor, the outcome of concrete blocks will be poor too. It will produce weak concrete blocks with numerous voids. In addition, during the mixing process, proper freshness is required. If polluted water is used or salt water is used, the materials will not be adequately mixed. Instead, the materials will start a chemical reaction with the water and form poor concrete blocks. Nowadays, the usage of superplasticizers is increasing instead of freshwater. Superplasticizers can achieve the required workability while significantly decreasing the chance of water leakage in concrete blocks. However, the application of superplasticizer should be made under the supervision of an experienced engineer.

Deviation from Designed Mix Ratio

The proper ratio of materials is very crucial in the process of making concrete blocks. If the ratio gets deviated, the quality will deviate as well. Often, manufacturers tweak the ratio to adjust to the customer demands. However, during the tweaking, the correct ratio gets altered. Usually, manufacturers use a higher quantity of water and incorrect aggregates and create voids in the concrete blocks. These voids contribute to the future water leakage issue.

Concrete Placement Issue

Segregation and bleeding of concrete are significant issues when it comes to concrete placement. If anything goes wrong during that process, the concrete blocks will risk water leakage. The probability of segregation and bleeding is at its highest during concrete pumping. Therefore, a mix of concrete blocks should be created, considering that the concrete mixture will require pumping.

Workmanship Quality

The workmanship determines the quality of the concrete. If the workers are poor in mixing and preparing a poor framework for installation, the concrete blocks will be vulnerable to water leakage. In addition, the lack of clear cover, improper compaction of concrete, faulty curing process, and plumbing failure will add to the risk of water leakage in concrete blocks.

Hence, uniform mixing of concrete needs to be ensured. If the workers use a machine to mix the concrete materials, the virtual inspections should be very thorough and ensure a uniform mixture. The concrete mixture should be poured before it loses its workability. One can always use a retarder to increase the time frame in which concrete mixture can be placed, compacted, and completed.

The formwork of the concrete blocks should be appropriately sealed to prevent any escape of water from the fresh concrete mixture. Otherwise, the mixture will be at risk of forming a honeycomb formation. Manufacturers must not use polythene to seal the formworks as it can cause a separator effect on the concrete mixture.

Improper concrete Cover

The concrete mixture should be adequately covered. If there are any open spaces, the air will seep through and begin a chemical reaction with the mixture. It may corrupt the quality of the aggregates. This is crucial because if the aggregates get corrupted, the quality of the concrete block will be poor. There may be an increased number of holes for water to leak. Hence, the workers should use proper material to cover the concrete firmly.

Inadequate Curing

Curing is the most sensitive period in the process of preparing concrete blocks. If the ideal condition is not ensured during the curing process, cracks will form in the concrete blocks. Hence, ensuring the concrete gets an adequate atmosphere to continue the curing process is crucial. There are many curing methods that will induce an effective outcome. Steam curing can be a valuable method to ensure high water resistance in concrete blocks. The concrete should be kept in a moist condition for a smooth curing process.

Source: waterdamageplus

Summary

Water leakage in concrete blocks is a serious issue. It is the primary cause of most building defects. However, if water leakage issues get addressed immediately, the defects can be eradicated eight out of ten times. In modern times, the concrete industry is saturated with different concrete blocks. Some types of concrete blocks are not porous and highly resistant to water. However, if prepared to maintain all the precautions, traditional concrete blocks will be free from water leakage.

FAQ (Frequently Asked Questions)

Does water leakage in concrete blocks affect the steel?

Ans: Yes, it does. If there are any leaks in the concrete slabs, it will cause steel corrosion and simultaneously deteriorate the concrete blocks.

Can I use muddy water in the concrete mixture?

Ans: No. If the water contains mud, it will hamper the curing process, and a honeycomb structure may be formed.

Can I use an additive to my concrete blocks to stop water leakage?

Ans: Additive is the final answer to battle water leakage. If the water leakage issue is found early, it can be fixed by changing the concrete blocks.

Shall I use water-resistant concrete blocks in my garage?

Ans: No. You should instead use concrete blocks that are highly porous for your garage. Otherwise, during rain, there may be a water logging situation.

What additive can I use to prepare waterproof concrete blocks?

Ans: You can use a liquid-applied membrane on the surface of the concrete blocks to create water-resistant concrete blocks.

Concrete block is gaining mass appeal in Bangladesh. Currently, the housing sector largely depends on traditional red bricks as the primary building block unit. However, numerous advantages of concrete blocks have persuaded many property owners to opt for concrete blocks. Integrating concrete blocks in building houses has made the process much easier and faster. Furthermore, concrete blocks have enabled the making of high-rise buildings. Among many types of concrete blocks, lightweight blocks are beneficial to build robust structures while keeping the overall weight of the building relatively lower than traditional brick-built structures. The popularity of lightweight concrete blocks in Bangladesh is also increasing.

What is a Lightweight Concrete Block?

Lightweight concrete blocks weigh much less than solid blocks. Lightweight blocks are made from lightweight concrete. It is a blend of lightweight coarse aggregates like shale, clay, and slate, providing low density. Lightweight concrete’s density ranges from 1440 to 1840 kg/m3. The most crucial property of lightweight concrete is generated by introducing air into the concrete.

Lightweight concrete blocks are commonly AAC blocks (Autoclaved Aerated Concrete). AAC is lightweight precast foam concrete. AAC’s significant properties include lower density, porousness, reusability, non-toxicity, renewability, and recyclability. These blocks came into reality after a Swedish architect thought of an alternative to wood in 1924. Wood is beneficial in building houses due to its properties like thermal insulation, firm structure, and smooth workability while being lightweight. But wood has major disadvantages like combustibility, decay, and termite damage. AAC blocks have all the advantages of wood while being fire and termite resistant.

AAC blocks offer superior performance and durability. People opt for lightweight concrete blocks in Bangladesh as they are a more sustainable and better alternative to traditional red clay bricks. These blocks are eight to nine times the size of a traditional red brick and provide much better compressive strength. Furthermore, these blocks are three times lighter than red bricks.

Lightweight Block Specifications

Generally, AAC blocks have regular size dimensions that are 600mm in length and 200mm in height. The width can range between 75mm to 300mm. These blocks have compressive strength between 7.5 to 10 MPa. The block density ranges from 550 – 650 kg/m3. The fire resistance of the block largely depends on the thickness of the blocks. However, it can be fire resistant from 2 to 6 hours. Drying shrinkage is around 0.04%, and the sound reduction index is 45 DB for a 200mm thick wall. Per block weight can range from 6 to 20 kg.

Source: Civil Lead

Advantages of Lightweight Blocks in Bangladesh

Building with lightweight concrete blocks can provide various advantages over other options available. Here is a list of advantages:

Lightweight

The most crucial benefit of using lightweight AAC blocks is their lighter weight than other options. These are typically three to four times lighter. Furthermore, AAC blocks weigh almost 50% less than standard concrete masonry blocks. Constructing high-rise buildings provides a better solution in high-density population zones. So, more people can live inside one apartment complex. The usage of lightweight blocks is of paramount importance in high-rise buildings. They allow reducing the overall dead load of the building. Hence, taller buildings can be constructed with lightweight blocks.

Easier Workability and Aesthetics

Lightweight blocks are very easy to work with. Workers can maneuver the blocks to build structures without much hassle compared to other types of blocks. Due to their aerated concrete nature, they have more air voids. So, it becomes easier to handle these blocks even if they have high volumes. AAC blocks can be cut, drilled, nailed, and grooved to fit specific requirements. Custom-sized blocks are also available. Sometimes large construction projects require specific block sizes to adjust sanitary and electrical equipment. Lightweight blocks can be altered according to project requirements.

Better Construction Pace

The housing industry is booming in Bangladesh. In order to meet the demand of the influx of people in Dhaka, various construction projects are ongoing in places like Purbachal New Town. It is the most significant planned township in Bangladesh. There is supposed to be a provision of 26,000 residential plots of different sizes. It requires many building block units to build houses at such a scale. Lightweight concrete blocks can increase the pace of construction many times if the blocks are implemented.

Furthermore, different sizes of blocks reduce the number of joints in wall masonry. Lighter blocks facilitate faster construction and a more comfortable workspace. These blocks are easy to implement and harden quickly to set appropriately.

Minimum Wastage

Traditional red bricks increase the construction cost by a lot due to wastage. Clay bricks can break easily due to transportation or mishandling on construction sites. On the other hand, lightweight blocks have negligible breakage reporting less than 5%. Hence, the utilization rate of lightweight blocks is much higher, which increases work efficiency.

Thermal Insulation

Thermal insulation is one of the essential advantages of lightweight blocks. Lightweight blocks have tiny air pores inside them. It makes it an excellent insulating material. So, heat gets trapped inside during the winter seasons, and the insides remain calm during the summer season. As a result, air conditioning bills reduce by a large margin if homes are fitted with lightweight blocks.

Acoustic Performance

Another significant benefit of using lightweight blocks in Bangladesh is their sound isolation properties. Lightweight blocks have superior sound absorption properties due to the porous nature of the blocks, offering a sound attenuation of about 42 decibels. Significant cities in Bangladesh suffer from extreme noise pollution due to unregulated traffic and the malpractice of drivers. Car horns, bike horns, loudspeakers in streets, etc., create an extremely painful experience for city dwellers. Dhaka is one of the worst victims of sound pollution in the world. So, if your property is near a busy street, you must think about the consequences of noise pollution if your building does not incorporate sound-insulating materials. Lightweight blocks offer excellent performance in this regard by providing sound isolation.

Fire Resistance

Lightweight AAC blocks are non-combustible and fire-resistant. They can survive even at 1600 degrees Celsius for up to six hours, depending on the thickness of the wall. Lightweight blocks are extremely helpful in fire-hazard zones.

Cost Saving

Lightweight blocks can save a lot of cost during construction. The surface accuracy of lightweight blocks is very high, and as a result, the requirement for plaster is less. It can save up to 2.5% of the construction cost.

Lightweight blocks require less jointing and minimize the requirement for cement and steel. Different sizes of lightweight blocks help in increasing the carpet area. Furthermore, lightweight blocks do not require much repairing.

Due to their lightweight nature, these blocks are much easier to transport. It reduces the transportation cost and installation costs.

Earthquake Resistant

Lightweight blocks are excellent at absorbing seismic pressure waves. So, buildings can be much more resistant to earthquakes. The lightweight property provides outstanding steadiness of the core structure.

Accuracy in Shape

Lightweight blocks are very accurate in their shapes and sizes. These blocks offer exceptional smoothness on walls with perfect joints between different elements. It also reduces the use of mortars and offers more aesthetic values.

Pest Resistance

Lightweight blocks are made from inorganic materials. Therefore, pests or termites cannot attack the concrete block surface. It saves a lot of repairing costs due to damage and losses.

Reducing Water Consumption

Lightweight concrete blocks do not require any water curing. So, water consumption can be reduced where water is scarce. However, the mortar joints will still require water for curing.  

Versatility and Longevity

Lightweight blocks reflect the urban nature of society. Modern and readily adaptable to different styles of architecture make it an attractive choice for many property owners.

Lightweight blocks are superior in terms of strength. Higher compressive strength gives the whole structure better durability and longevity. Lightweight concrete blocks do not get affected by harsh climatic conditions. Their degradation is negligible due to changing atmospheric conditions. Moreover, lightweight blocks resist chipping and cracking.

Moisture Resistance

Moisture can cause damage to the structure of the building. It is an essential issue in countries with higher rainfall like Bangladesh. Moisture protection is a primary concern in a building both from the inside and outside. Rainfall and water from soil are external sources of moisture. The internal source of moisture mainly comprises humidity. Lightweight blocks contain a very porous structure, commonly known as macropores. These pores are evenly distributed throughout the material. As a result, the absorption of water into the lightweight blocks is minimal.

Eco-friendly and Sustainability

People have become very aware of their impact on the environment. It is our responsibility to reduce our impact on the environment. Lightweight concrete blocks have the most negligible impact on the environment than other building blocks. They help reduce at least 50% of greenhouse emissions and decrease 30% of environmental waste.

Some Disadvantages of Lightweight Blocks

No product exists without its demerits. Lightweight blocks are no exception to that. Despite so many advantages, there are some factors you should consider before opting for lightweight blocks in your next construction project.

• Due to their lightweight nature, these blocks can only be used in partition walls. So, these cannot be used in load-bearing walls. Typically, solid and dense blocks are more suitable for load-bearing walls.
• Sometimes cracks can appear in lightweight blocks after installation if the proper method is not maintained.
• Lightweight blocks are brittle. So, they should be handled carefully.
• The cost per block is relatively higher than other alternatives. However, the overall construction cost reduces as installing lightweight blocks is cheaper due it requires less mortar, cement, and steel.
• To meet the demand for hanging requirements, long and thin screws should be used due to the brittle nature of lightweight concrete blocks. Large diameter wall plugs are more suitable than a standard plug, which costs a bit higher.
• Thicker lightweight blocks are more appropriate for establishing proper insulation in the home. Thicker blocks might increase the price of the construction process.
• Lightweight blocks cannot be hammered for chiseling services due to their brittle nature. However, these blocks can be cut easily by a carpenter’s saw, which is a time-consuming process that requires the help of professionals.
• If lightweight blocks are installed in high humidity environments, interior finishes must contain low vapor permeability, and exterior finishes require high permeability.
• Contractors are not familiar with the installation process of lightweight blocks.

Why Should You Choose Lightweight Concrete Blocks in Bangladesh?

As discussed earlier, there are many benefits of incorporating lightweight concrete blocks in construction projects in Bangladesh. So, it can make the process of building homes much easier and faster. Various properties of lightweight blocks are very suitable in Bangladeshi weather conditions. Large construction projects are already establishing the use of these blocks to make the lives of residents more comfortable.

Summary

There are many types of concrete blocks available in the Bangladeshi market. Property owners should ensure their homes are built with the most appropriate blocks to meet their budget and requirement. The Bangladeshi government is trying to phase out the use of red bricks as it poses severe threats to the environment. On the other hand, concrete blocks offer a more sustainable and eco-friendly solution. The use of lightweight blocks is becoming more appropriate in Bangladesh.

Frequently Asked Questions (FAQs)

Can I use lightweight concrete blocks in load-bearing walls?

Ans: No. It is not recommended to use lightweight concrete blocks in load-bearing walls.

Can I use lightweight blocks in external walls?

Ans: Lightweight blocks can be used in both internal and external walls in a non-load-bearing manner.

Are AAC blocks lightweight?

Ans: AAC blocks are recognized as lightweight concrete blocks.

Is it cheaper to build using red bricks or lightweight blocks?

Ans: Using lightweight blocks is around 20 – 25% cheaper than using red bricks.

Can I install tiles on lightweight concrete blocks?

Ans: Yes. You can use thin-set adhesive to install tiles on AAC/Lightweight concrete blocks.

The use of concrete blocks has substantially increased in the last decade in Bangladesh. There are many advantages of using concrete blocks over traditional masonry units like red bricks. So, property owners are opting for the more modern and eco-friendlier alternative. The government of Bangladesh plans to reduce the use of red bricks to zero by 2025, according to The Business Standard. However, a lack of popularity in Bangladesh and people not knowing how to buy concrete blocks have impeded reaching the target. Property owners who plan to build their homes from scratch should know some essential information on the different purposes of concrete blocks. Different parts of a building are composed of different concrete blocks that are only suitable for those scenarios. Knowing the usability beforehand can help you to make a proper purchasing decision. This article aims to be your guide to buying concrete blocks in Bangladesh.

Different Types of Concrete Blocks for Your Construction Requirements

Concrete blocks are the most common building material in the west. Almost all modern structures require concrete blocks to derive structural strength and other qualities. High-rise buildings require extensive load-bearing capabilities to sustain extremities. Concrete blocks have become an ideal choice in such cases.

The housing market in Bangladesh is booming. Many real estate developer companies are working day and night to build high-rise structures for housing. Dhaka is shifting its trend from building traditional six-storied buildings to twenty-storied or more. Traditional red bricks reduce the pace of construction work and are not suitable for high-rise buildings. So, the trend of using concrete blocks is rising in Bangladesh.

To purchase concrete blocks, you need to have a practical sense of the characteristics, performance benefits, and latest design guidance for concrete blocks in construction. Each type of block will offer its benefits if used appropriately. There are many different types of concrete blocks in the market. The following section will discuss what kind of concrete blocks you should purchase.

Aggregate Blocks

These blocks are available in a wide range of densities and compressive strengths. Different densities of aggregate concrete blocks are grouped into ultra-lightweight, lightweight, and dense categories. All concrete blocks are made from cement and add on different elements to alter the properties. Ultra-lightweight and lightweight blocks contain granulated or foamed blast-furnace slag, expanded clay, pumice, shale, and fly ash collected from various coal-based power stations. As the density increases, the load-bearing capacity or the strength of the block also increases. The first two blocks are used in internal and external walls and applications that do not require special load-bearing capacities. Lightweight blocks can provide lower levels of thermal conductivity due to the increased percentage of air. So, these blocks can offer better thermal insulation compared to denser blocks. Aggregate blocks typically weigh in the range of 8.5 – 20 KG and widths of 100mm. On the other hand, denser aggregate concrete blocks offer higher compressive strength, better acoustic performance, greater thermal mass, and low air permeability.

Source: Mir Concrete Block | Concrete Block in Bangladesh

Aircrete Blocks

Aircrete blocks offer the lightest option in the concrete blocks category. These blocks are made from cement, lime, sand, fly ash, and water. Aluminum powder is later added, which reacts with the lime to form tiny bubbles, causing the mixture to expand into a cake-like figure. After the mixture is partially set, they are cut into concrete block pieces. The concrete is then cured by steam to achieve its desired strength. The blocks’ lightweight nature allows them to perform well in heat insulation by reducing heat loss through external walls and junctions. These blocks are used in places like aggregate blocks. However, its lightweight nature does not make it a good option in places where high compressive strength is required. The general standard is 9N/mm2 or less for Aircrete blocks. These blocks are easy to work with and handle on construction sites.

The lightweight nature of Aircrete blocks makes it possible to manufacture large-format blocks, which can maintain a high margin of dimensional accuracy. This property can enable thin mortar joints, around 2 – 3mm, using a special kind of adhesive. Such adhesives can start setting in under half an hour and reach full strength in only 2 – 3 hours. Conventional mortar applications require a minimum of 24 hours before an additional load can be applied. These features allow an excellent pace in construction works, enabling large projects to be completed within a constrained time frame. The thermal characteristics of large-format blocks are the same as for standard Aircrete blocks. However, thinner mortar joints can cause a reduction in thermal bridging compared to conventional mortar joints.

Foundation Blocks

Foundation blocks are specially designed concrete blocks that are used below ground levels and provide a speedy and well-situated means to construct a base for supporting cavity and solid walls, beams, and block floors. As concrete blocks are precast block elements, the foundation work can be completed within a short time if they are used. Foundations blocks are manufactured both in Aircrete and Aggregate block types so that they are resistant to moisture, freeze/thaw, and sulfate attacks. If Aircrete types are used, compressive strength gets limited in the range of 3.6 – 7.3N/mm2. Lower-storied buildings can opt for these blocks.

On the other hand, high strength like 10.4 N/mm2 can also be achieved but only through aggregate blocks. Foundation walls are manufactured in various sizes that can span cavity walls that differ in widths. Some foundation blocks can be used above ground for solid wall construction.

Concrete Coursing Blocks

It is a particular type of block used for infilling small areas in walls to maintain a consistent level while laying blocks. These blocks are typically reduced in height, around 65mm. These come in very handy when doors or windows are placed in a wall. So, using coursing blocks, lintels above windows and doors can be leveled according to the rest of the wall’s height. Coursing blocks are suitable for almost all types of construction works, above or below damp-proof level, helping maintain a consistent height, and reducing the need for cutting blocks on site. For adjustment purposes, large concrete blocks are usually cut into required lengths, which can increase the cost as concrete cutting machines are required and introduce wastage of some blocks. So, concrete coursing blocks can help in such situations. These blocks are produced in Aircrete and Aggregate formats. Proper block types should be carefully picked to match the wall’s general build properties.

Hollow Blocks (Aggregate Type)

Hollow aggregate blocks contain cavities or holes inside them, passing from top to bottom. These blocks come in a variety of sizes and strengths. Hollow blocks usually carry 30 – 40% of the weight of a similar-sized solid concrete block. These blocks are widely used in the construction industry for general purpose works. It is easy to work with, making it a popular option for commercial works. One of the significant benefits of using hollow blocks is their incredible strength when reinforced with concrete fillings or steel rebar. These blocks can be used above and below damp-proof concrete levels.

Source: Mir Concrete Block | Concrete Block in Bangladesh

Cellular Blocks (Aggregate Type)

These blocks have cavities like hollow blocks. However, the cavities are blind, so they do not pass entirely through the blocks. It allows a full mortar bed on one face, beneficial for construction works. Cellular blocks can be used in one or both leaves of cavity walls. It can serve the purpose of a lower-weight alternative to solid aggregate blocks.

Furthermore, the reduced weight in cellular blocks does not take away its strength. It can perform similarly solid aggregate blocks. Other applications of cellular blocks include internal partitions and infill walling for framed structures. These blocks can achieve strengths from 2.9 – 10.4N/mm2.

Facing Blocks

These blocks are also known as decorative blocks. These are available in various colors and textures for both internal and external usage. The specialty of these blocks is their decorative properties without compromising in strength. These blocks have become quite popular in decorating modern living spaces. Commercial places or office places use these blocks to appeal to customers. They are incredibly well-suited for projects that require color consistency and textures.

Important Concrete Block Properties You Should be Aware of

Concrete blocks are available in different composite materials. The composition and manufacturing process determine the compressive strength of concrete blocks. They are also available in different sizes. Before purchasing concrete blocks, you must make sure what kind of blocks you require for your project. These properties of concrete blocks can determine the quality of your living standard inside the space.

Block Strength

Concrete block strength is an essential factor to decide before beginning project work. If you plan to build one or two-story buildings, concrete blocks with a compressive strength of around 3 N/mm2 are enough for cavity walls’ inner leaf. If a three-story building with a story height of more than 2.7m is considered, blocks with compressive strength of 7.3 N/mm2 or more are required for specific parts of the structure. However, depending on your project’s structural design and purpose, compressive strength requirements can change significantly. Sometimes different qualities of concrete blocks are required more than strength, such as resistance to chemical attacks. Building projects near the seashore can bring a whole new set of challenges to the table. So, it would help to determine what kind of block strength is suitable for your project.

Block Sizes

Concrete blocks are now available in the market in a variety of sizes. But you can purchase standard-size concrete blocks suitable for general purpose construction work that measures 440mm x 100mm x 215mm. For better understanding, you can compare this height with three red bricks and length as two red bricks with 10mm thickness of mortar joints. Furthermore, you can purchase alternative sizes according to your requirements. There are some alternatives readily available in the market that can improve the productivity of construction sites. There are Aircrete blocks with larger face sizes light enough to be handled manually, improving the pace and quality of construction work. Smaller-sized dense blocks can be used where manual handling is the only option.

Insulation

The insulation property of concrete blocks will heavily influence how you live inside your home. Insulation properties depend on the density and brand of your concrete block. By reducing the density in concrete blocks, manufacturers can drastically reduce the thermal conductivity. Thus, increasing the heat-insulation properties of the concrete blocks. It is an essential factor in places where it gets scorching during the summer, like in Bangladesh. Air conditioners can increase electricity bills during the summer seasons if your home is not protected against the heat. Furthermore, good insulation properties keep your home warm and comfortable during the winter season.

Acoustic Performance

The acoustic performance or outside noise can enter your living space depending on the concrete block structure, manufacturing method, block composition, the junction between different blocks, and the density of concrete blocks. If your property is near a busy street where you plan to build your home, keeping the acoustic performance of concrete blocks in mind can immensely impact how you live in your home. Noise pollution is one of the significant concerns in Bangladesh that is responsible for degrading the quality of life for many residents near streets, mainly in Dhaka. The unregulated honking of horns adds to an unbearable amount of cacophony in the city. Building homes with concrete blocks can somewhat mitigate these alarming issues.

All solid materials have a natural frequency of vibration. If a sound strikes the wall with the same frequency, the wall starts to vibrate in sympathy with the sound, translated on the opposite side. Light or thin partition walls suffer from noise pollution more. If the wall is made with denser material like concrete blocks, the natural frequency of that will be very low. So, only lower frequency sounds will transmit through the wall. As a result, concrete blocks play a significant role in reducing sound transmission.

Resistance to Fire

Fire-related incidents have tripled over the last 22 years in Bangladesh, according to Dhaka Tribune. So, making your home safe and resistant to fire is a crucial aspect of living in the city. You can check the quality of fire resistance before purchasing concrete blocks. Fire resistance properties vary significantly due to the choice of manufacturing material and density. You can check for additional information on the fire ratings of the concrete block that you wish to purchase.

Designs and Aesthetics

The design elements of your living space reflect your taste and personality. So, it is of paramount importance that you choose something that best suits your taste. With concrete blocks, you get a range of choices. If you are doubtful about which design element to go for, you can always consult with an architect who will walk you through the process of designing your dream home. Sometimes people relate concrete block homes to utilitarian aspects. However, there is a wide variety of colors and textures available in the concrete block market.

Sustainability

If you plan to build your home with sustainable materials, concrete blocks can offer the best option. Blocks contain a high level of recycled materials. Furthermore, they make less impact on the environment, unlike brick production, which can severely hamper the environment by releasing an extensive amount of CO2 and diminishing the topsoil, which is regarded as the life of agriculture. Using concrete blocks is a greener alternative in the construction workspace.

How to Buy Concrete Blocks in Bangladesh?

There are many concrete block manufacturers in Bangladesh. Concrete block prices vary depending on their types. You can purchase them directly from manufacturers or 3rd party suppliers. However, you should ensure you are purchasing authentic products by verifying them properly.

Mir Concrete Blocks offer one of the best quality concrete blocks in Bangladesh. The company’s solid blocks come in 240 x 107 x 70 mm sizes. The hollow blocks can be purchased in different thicknesses ranging from 390 x 190 x 90 mm to 390 x 190 x 240 mm. Furthermore, the company has a range of paver blocks suitable for your patios or driveways.

Summary

The Bangladesh government aims to popularize the usage of concrete blocks in upcoming years. All government projects should use 100% concrete blocks from the 2024 – 2025 fiscal year to curb brick kiln-related pollution. Concrete blocks are a sustainable building block material. Reducing our dependence on traditional red bricks will allow our environment to remain free from extreme pollutants. Furthermore, there are numerous benefits of using concrete blocks over other masonry units. However, you should make your purchase decision carefully to maximize the productivity and efficiency of your construction project.

Frequently Asked Questions (FAQs)

How can you know the quality of concrete blocks?

Ans: There are many tests to check the quality of concrete blocks. Drop test, corner test, chisel test, nail test, etc., methods can be applied to determine the quality of blocks.

How to know if a concrete block is hollow?

Ans: If you want to know this before purchasing, you can quickly identify hollow blocks through their cavities. If a wall is already built using blocks and you want to know whether it is hollow or solid, you can simply drill a part of the wall. If it provides a strong resistance all the way through, then it is solid, and if little resistance is shown, then the block is hollow.

What type of block should I purchase for my residential building?

Ans: You can choose hollow and solid concrete blocks depending on your requirements.

Are concrete blocks more expensive than red bricks?

Ans: No. You can complete your construction work at a cheaper rate with concrete blocks.

Is it an excellent choice to build my home with concrete blocks in Bangladesh?

Ans: Absolutely. Using concrete blocks is the most advantageous and eco-friendly option you can go with.

Concrete blocks have become an integral part of all modern structures. The use of concrete blocks has made it easier to build mammoth structures within a short period. Furthermore, concrete blocks have promised more reliable, durable, and rigid structures. Concrete blocks are more affordable than traditional red bricks. It is an excellent choice for constructing walls for foundations or utility buildings.

There are numerous types of concrete blocks available for different construction purposes. Concrete blocks are commonly known as CMU or concrete masonry units. They come in different shapes and sizes as well. It is essential to calculate how many concrete blocks you require before starting construction. Knowing beforehand can save you from extra costs and increase efficiency in the construction work. Furthermore, you do not have to appoint an expert to calculate the number of concrete blocks required for your work. You can do it easily by simply doing some math with a pen and paper.

How to Calculate the Number of Concrete Blocks

There are many ways you can calculate the number of concrete blocks you might require for building a wall or other parts of the project. From all these methods, two are very simple to understand and apply. These are:

1.   Surface Area Calculation Method
2.   Volume Calculation Method

How to Calculate the Number of Concrete Blocks Using Surface Area Calculation Method

To perform this method, you need to collect some data first. You need to know the wall’s surface area that you intend to build, the surface area of a standard concrete block that you want to use, and the surface area of any opening in the wall, e.g., windows doors. The following steps will guide you:

Step 1

First, you need to determine the height and length of the wall you want to build. Generally, the height is around 10 feet, and the length will depend on how long you want. For ease of calculation, let’s assume the length is 10 feet.

Length=	10 feet
Height=	10 feet

Step 2

After calculating the height and length, now it’s time to figure out the wall’s surface area. It can be determined using a simple formula, Surface Area = Length * Height.

For our example, the surface area of the wall becomes:

• Surface Area = 10 * 10 = 100 square feet.

Step 3

If you plan to place any windows or doors in the wall, you need to subtract its surface area from the total surface area of the wall. Let’s assume you plan to place a window that measures 5 feet in length and 5 feet in height. So, the surface area of the window becomes:

• Surface Area of the Window = 5 * 5 = 25 square feet.

Step 4

Now, you need to subtract the window’s surface area from the total area you calculate in step 2. For our case, it becomes:

• Final Surface Area of the Wall = 100 – 25 = 75 square feet

Step 5

At this stage, we have calculated everything about the wall. We need to figure out what kind and what size of concrete block you want to use in the wall. Let’s assume the measurement of a standard-sized concrete block.

• Block Measurement        = 16” * 8” * 8” (measurements are in inch)
• Mortar Allowance            = 1”
• Total Surface Area of One Block with Mortar  = (16+1) * (8+1) = 153 square inch.

                                                                                              = 153 / (12 * 12) (1 feet = 12 inch)                                                        

                                                                                              = 1.0625 square feet

Step 6

This is the final step of your calculation. You need to divide the total surface area of the wall by the surface area of one block to calculate the number of concrete blocks.

Number of Blocks = Final Surface Area of the Wall / Total Surface Area of One Block = 75 / 1.0625 = 71 blocks

However, it would help if you considered wastage as many blocks can get damaged due to transportation, poor handling, or other reasons. Considering a 5% wastage should be more than enough. So, for our example:

• Total Number of Blocks = 71 + (71 * 5 / 100) = 71 + 4 = 75 blocks

By following these six steps, you can easily calculate the number of concrete blocks required to construct a wall.

Source: Daily Civil

How to Calculate the Number of Concrete Blocks Using Volume Calculation Method

Like the surface calculation method, you need some data about the volume of the wall, the volume of the concrete block, and the volume of the openings in the wall. The following steps can be followed to calculate the number of concrete blocks.

Step 1

In volume calculation, you need a third parameter to determine the volume. You need to determine the wall’s length, height, and thickness for this measurement. Taking our previous example, we get

• Length       = 10 feet
• Height        = 10 feet
• Thickness  = 8” = 0.67 feet     (thickness of the wall is comparable to the thickness of the concrete block)

Step 2

Now, you can calculate the volume of the wall by using the following formula

• Volume = length * Height * Thickness
• So, volume of the wall = 10 * 10 * 0.67 = 67 cubic feet

Step 3

If you plan to place any doors or windows, you need to subtract the volume of that opening from the wall area.

Taking our previous measurement, we get

The volume of the window = 5 * 5 * 0.67 = 17 cubic feet (thickness of the window is comparable to the thickness of the concrete block)

Step 4

Now, you can subtract the amount.

• Final Volume of the Wall = 67 – 17 = 50 cubic feet

Step 5

Now, you need to calculate the volume of a single concrete block with a mortar allowance.

If the block is of the same size as in the previous case and mortar allowance is 1 inch, we get

Volume of a Single Block with Mortar = (16 + 1) * (8+1) * 8 = 1224 cubic inch

                                                                     = 1224 / 12 * 12 * 12 = 0.70 cubic feet

Step 6

• Number of Blocks = Final Volume of Wall / Volume of a Block with Mortar = 50 / 0.70 = 71 blocks
• Considering 5% wastage of blocks like the previous case will increase the number.
• Total Number of Blocks = 71 + (71 * 5 / 100) = 71 + 4 = 75 blocks

Summary

Calculating the number of concrete blocks on a wall beforehand can help you reduce cost and increase efficiency. Suppose the wall is already constructed, and for some reason, you need to calculate the number of concrete blocks on that wall. In that case, you can count the number of blocks individually or follow the discussed method, which is much easier. Without any engineering or architect skills, anyone can figure out the number of blocks required for a project. However, you should keep in mind that blocks are not abstract unit areas. Concrete blocks are physical objects. If you get fractional results, do not get confused. You should take the higher integer number in such cases.

Frequently Asked Questions (FAQs)

Do I need the help of experts to calculate the number of required blocks in a wall?

Ans: No. Anyone can figure it out by following simple steps of arithmetic.

What size is a concrete block?

Ans: In Bangladesh, Concrete blocks come in a different range of shapes and sizes. They can also be custom-made. So, the size will depend on the category you select.

How to measure the length of a wall?

Ans: You can measure any length by using tape measures.

How are concrete blocks priced?

Ans: Concrete blocks are priced per block or meter square.