{"id":99,"date":"2022-02-24T06:02:44","date_gmt":"2022-02-24T06:02:44","guid":{"rendered":"https:\/\/mirconcreteblock.com\/blog\/?p=99"},"modified":"2022-02-24T06:06:52","modified_gmt":"2022-02-24T06:06:52","slug":"how-the-concrete-is-cured-by-steam-at-atmospheric-pressure","status":"publish","type":"post","link":"https:\/\/mirconcreteblock.com\/blog\/how-the-concrete-is-cured-by-steam-at-atmospheric-pressure\/","title":{"rendered":"How the Concrete is Cured by Steam at Atmospheric Pressure?"},"content":{"rendered":"<p><span style=\"font-weight: 400;\">Curing is a critical process that ensures the concrete\u2019s durability, strength, and longevity. It helps to accelerate the hydration of cement by controlling moisture and temperature. There are<\/span> <a href=\"https:\/\/mirconcreteblock.com\/blog\/the-most-effective-concrete-curing-methods-know-before-curing\/\"><span style=\"font-weight: 400;\">different concrete curing methods<\/span><\/a><span style=\"font-weight: 400;\">, and steam curing is one of them. Steam curing is an excellent way to push the concrete to reach its maximum potential faster. Primarily, curing aims to prevent moisture loss from concrete and keep it saturated with water to aid the hydration process. Steam curing at atmospheric pressure makes curing the concrete with water vapor.<\/span><\/p>\n<div id=\"ez-toc-container\" class=\"ez-toc-v2_0_18 counter-hierarchy counter-decimal ez-toc-grey\">\n<div class=\"ez-toc-title-container\">\n<p class=\"ez-toc-title\">Checklist<\/p>\n<span class=\"ez-toc-title-toggle\"><a class=\"ez-toc-pull-right ez-toc-btn ez-toc-btn-xs ez-toc-btn-default ez-toc-toggle\" style=\"display: none;\"><i class=\"ez-toc-glyphicon ez-toc-icon-toggle\"><\/i><\/a><\/span><\/div>\n<nav><ul class=\"ez-toc-list ez-toc-list-level-1\"><ul class=\"ez-toc-list-level-2\"><li class=\"ez-toc-heading-level-2\"><a class=\"ez-toc-link ez-toc-heading-1\" href=\"https:\/\/mirconcreteblock.com\/blog\/how-the-concrete-is-cured-by-steam-at-atmospheric-pressure\/#What-is-Steam-Curing\" title=\"What is Steam Curing?\">What is Steam Curing?<\/a><\/li><li class=\"ez-toc-page-1 ez-toc-heading-level-2\"><a class=\"ez-toc-link ez-toc-heading-2\" href=\"https:\/\/mirconcreteblock.com\/blog\/how-the-concrete-is-cured-by-steam-at-atmospheric-pressure\/#Difference-Between-Steam-Curing-at-High-Pressure-and-Atmospheric-Pressure\" title=\"Difference Between Steam Curing at High Pressure and Atmospheric Pressure\">Difference Between Steam Curing at High Pressure and Atmospheric Pressure<\/a><\/li><li class=\"ez-toc-page-1 ez-toc-heading-level-2\"><a class=\"ez-toc-link ez-toc-heading-3\" href=\"https:\/\/mirconcreteblock.com\/blog\/how-the-concrete-is-cured-by-steam-at-atmospheric-pressure\/#Steam-Curing-Phases-of-Concrete-at-Atmospheric-Pressure\" title=\"Steam Curing Phases of Concrete at Atmospheric Pressure\">Steam Curing Phases of Concrete at Atmospheric Pressure<\/a><\/li><li class=\"ez-toc-page-1 ez-toc-heading-level-2\"><a class=\"ez-toc-link ez-toc-heading-4\" href=\"https:\/\/mirconcreteblock.com\/blog\/how-the-concrete-is-cured-by-steam-at-atmospheric-pressure\/#How-the-Concrete-is-Cured-by-Steam-at-Atmospheric-Pressure\" title=\"How the Concrete is Cured by Steam at Atmospheric Pressure?\">How the Concrete is Cured by Steam at Atmospheric Pressure?<\/a><\/li><li class=\"ez-toc-page-1 ez-toc-heading-level-2\"><a class=\"ez-toc-link ez-toc-heading-5\" href=\"https:\/\/mirconcreteblock.com\/blog\/how-the-concrete-is-cured-by-steam-at-atmospheric-pressure\/#Usability-of-Steam-Curing\" title=\"Usability of Steam Curing\">Usability of Steam Curing<\/a><\/li><li class=\"ez-toc-page-1 ez-toc-heading-level-2\"><a class=\"ez-toc-link ez-toc-heading-6\" href=\"https:\/\/mirconcreteblock.com\/blog\/how-the-concrete-is-cured-by-steam-at-atmospheric-pressure\/#Advantages-of-Steam-Curing-Process\" title=\"Advantages of Steam Curing Process\">Advantages of Steam Curing Process<\/a><\/li><li class=\"ez-toc-page-1 ez-toc-heading-level-2\"><a class=\"ez-toc-link ez-toc-heading-7\" href=\"https:\/\/mirconcreteblock.com\/blog\/how-the-concrete-is-cured-by-steam-at-atmospheric-pressure\/#Disadvantages-of-Steam-Curing-Process\" title=\"Disadvantages of Steam Curing Process\">Disadvantages of Steam Curing Process<\/a><\/li><li class=\"ez-toc-page-1 ez-toc-heading-level-2\"><a class=\"ez-toc-link ez-toc-heading-8\" href=\"https:\/\/mirconcreteblock.com\/blog\/how-the-concrete-is-cured-by-steam-at-atmospheric-pressure\/#-Summary\" title=\"\u00a0Summary\">\u00a0Summary<\/a><\/li><\/ul><\/li><li class=\"ez-toc-page-1 ez-toc-heading-level-1\"><a class=\"ez-toc-link ez-toc-heading-9\" href=\"https:\/\/mirconcreteblock.com\/blog\/how-the-concrete-is-cured-by-steam-at-atmospheric-pressure\/#Frequently-Asked-Questions-FAQs\" title=\"Frequently Asked Questions (FAQs)\">Frequently Asked Questions (FAQs)<\/a><ul class=\"ez-toc-list-level-3\"><li class=\"ez-toc-heading-level-3\"><ul class=\"ez-toc-list-level-3\"><li class=\"ez-toc-heading-level-3\"><a class=\"ez-toc-link ez-toc-heading-10\" href=\"https:\/\/mirconcreteblock.com\/blog\/how-the-concrete-is-cured-by-steam-at-atmospheric-pressure\/#What-is-the-minimum-curing-period\" title=\" What is the minimum curing period?\"> What is the minimum curing period?<\/a><\/li><\/ul><\/li><\/ul><\/li><\/ul><\/nav><\/div>\n<h2><span class=\"ez-toc-section\" id=\"What-is-Steam-Curing\"><\/span><b>What is Steam Curing?<\/b><span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p><span style=\"font-weight: 400;\">Steam curing is a process of concrete curing that uses water vapor at atmospheric or higher pressure. The steam chamber temperature reaches between 40 \u2013 70 degrees Celsius at atmospheric pressure. The temperature varies due to the size and shape of concrete precast elements. This method provides excellent benefits in manufacturing large precast units and enclosed cast-in-place structures. Steam curing can accelerate the strength gain process of concrete by increasing the temperature and providing moisture simultaneously. Steam curing is a standard process used in producing precast concrete products and elements for high productivity. The leading reason steam curing is used is its ability to provide high early strength in concrete. It is used where high early strength is necessary, and heat is essential for hydration, like in colder climates.<\/span><\/p>\n<p><span style=\"font-weight: 400;\">In prestressing and precast plants, steam curing methods can provide early strength without demerits. It enables the usage of rapid demolding and reuse of forms. There are two types of steam curing:<\/span><\/p>\n<ol>\n<li><span style=\"font-weight: 400;\">Steam curing at atmospheric pressure<\/span><\/li>\n<li><span style=\"font-weight: 400;\">Steam curing at high pressure<\/span><\/li>\n<\/ol>\n<h2><span class=\"ez-toc-section\" id=\"Difference-Between-Steam-Curing-at-High-Pressure-and-Atmospheric-Pressure\"><\/span><b>Difference Between Steam Curing at High Pressure and Atmospheric Pressure<\/b><span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p><span style=\"font-weight: 400;\">Steam curing at atmospheric pressure uses steam that is below 100 degrees Celsius. This method can also be labeled as hot water curing. Furthermore, this method is performed under an open atmosphere. On the other hand, steam curing at high pressure is quite different. High-pressure steam curing is performed in closed chambers. Superheated steam is used at pressures reaching 80 \u2013 170 psi and between 160 \u2013 190 degrees Celsius. This method of concrete curing is commonly known as \u201cAutoclaving.\u201d<\/span><\/p>\n<h2><span class=\"ez-toc-section\" id=\"Steam-Curing-Phases-of-Concrete-at-Atmospheric-Pressure\"><\/span><b>Steam Curing Phases of Concrete at Atmospheric Pressure<\/b><span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p><span style=\"font-weight: 400;\">Steam curing at atmospheric pressure requires the concrete to be prepared in four phases. These phases allow the process to be carried out in a standard and effective method.<\/span><\/p>\n<ol>\n<li><b> Delay before Starting the Steam Curing Process: <\/b><span style=\"font-weight: 400;\">Concrete is placed under high temperature for 180 minutes in this phase. It creates a good environment in the concrete for hydration to occur.<\/span><\/li>\n<li><b> Increasing Temperature Phase: <\/b><span style=\"font-weight: 400;\">The steam curing begins at this phase. Curing temperature is increased to 60 degrees Celsius by maintaining 120 minutes.<\/span><\/li>\n<li><b> Maximum Temperature Phase: <\/b><span style=\"font-weight: 400;\">In this phase, the steam curing process reaches its maximum temperature, typically more than 70 degrees Celsius, and is maintained for around 120 minutes.<\/span><\/li>\n<li><b> Declining Temperature Phase: <\/b><span style=\"font-weight: 400;\">In the last phase, concrete products are allowed to cool down for a time of 120 minutes.<\/span><\/li>\n<\/ol>\n<p><em><span style=\"font-weight: 400;\">Source: <\/span><a href=\"https:\/\/theconstructor.org\/concrete\/steam-curing-concrete-methods-advantages\/38837\/\" target=\"_blank\" rel=\"noopener\"><span style=\"font-weight: 400;\">The Constructor<\/span><\/a><\/em><\/p>\n<h2><span class=\"ez-toc-section\" id=\"How-the-Concrete-is-Cured-by-Steam-at-Atmospheric-Pressure\"><\/span><b>How the Concrete is Cured by Steam<\/b><b> at Atmospheric Pressure?<\/b><span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p><span style=\"font-weight: 400;\">The steam curing method requires an enclosed space to avoid moisture and heat loss. This makes the whole process more efficient. Generally, water repellant membranes like tarpaulins form the enclosed space.<\/span><\/p>\n<p><span style=\"font-weight: 400;\">Before applying steam, the concrete must be hardened enough to sustain the vapor. It should be delayed for at least three hours or as long as the concrete is required to harden after its final placement. After placing the concrete elements in the steam enclosure, these should remain there for three to five hours. This time range makes sure the concrete reaches its <a href=\"https:\/\/mirconcreteblock.com\/quality-assurance\"><span style=\"text-decoration: underline;\">desired high early strength<\/span><\/a>.<\/span><\/p>\n<p><span style=\"font-weight: 400;\">The steam curing process of concrete is sophisticated, where all variables play a crucial part. Ignoring one factor might bring negative results for the longevity and durability of the concrete. Control plays a big part in steam curing concrete. The following variables should be carefully examined to avoid any shortcomings.<\/span><\/p>\n<ul>\n<li><span style=\"font-weight: 400;\">The period of steam curing<\/span><\/li>\n<li><span style=\"font-weight: 400;\">Steam curing temperature<\/span><\/li>\n<li><span style=\"font-weight: 400;\">Delay period of the time between concrete mixing and the starting of the curing process<\/span><\/li>\n<li><span style=\"font-weight: 400;\">The rate at the temperature increases in the enclosure<\/span><\/li>\n<li><span style=\"font-weight: 400;\">The maximum rate of temperature decrease<\/span><\/li>\n<\/ul>\n<h2><span class=\"ez-toc-section\" id=\"Usability-of-Steam-Curing\"><\/span><b>Usability of Steam Curing<\/b><span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p><span style=\"font-weight: 400;\">Precast concrete elements are highly benefited by steam curing at atmospheric pressure. Modern structures are primarily dependent on concrete elements. This method is very useful in developing countries where large infrastructural projects are ongoing. Bridges require precast prestressed girders. These girders are cured at steam for faster development of strength and durability. Furthermore, large construction sites require a <a href=\"https:\/\/mirconcreteblock.com\/product\"><span style=\"text-decoration: underline;\">lot of precast blocks<\/span><\/a> that can achieve strength faster than <a href=\"https:\/\/mirconcreteblock.com\/blog\/the-most-effective-concrete-curing-methods-know-before-curing\/\"><span style=\"text-decoration: underline;\">traditional curing methods<\/span><\/a> that require 28 days. So, steam curing is highly useful in these scenarios.<\/span><\/p>\n<p><span style=\"font-weight: 400;\">However, steam curing on the construction site is difficult to execute. But at some construction sites, it can be executed by forming a steam jacket by trapping the vapor with tarpaulin or thick polythene sheets. But these methods are sometimes costly and do not show effective results as steam can escape making the concrete drier than expected.<\/span><\/p>\n<p><span style=\"font-weight: 400;\">The steam curing method is beneficial in precast elements, which can be stored in enclosures, ensuring steam cannot escape. At atmospheric pressures, raising the temperature by more than 70 degrees is not recommended as it does not help with the strength development of concrete. Raising temperature more than the limit may not be economically viable, and also it can induce damage in the concrete if not appropriately supervised. If the internal temperature of concrete exceeds 70 degrees, it can introduce delayed expansion and reduce its ultimate strength gain. The type of cement used to manufacture concrete also plays a vital role in the ultimate strength gain process of concrete. So,<\/span> <span style=\"font-weight: 400;\">choosing the right cement<\/span><span style=\"font-weight: 400;\"> aids in the steam curing of concrete.<\/span><\/p>\n<p><span style=\"font-weight: 400;\">One of the most important things to avoid during steam curing is excessive heating and cooling rates. This can introduce a weakened bond on the concrete. The temperature in the enclosure should always stay in the recommended range; otherwise, the concrete can get damaged. The range might fluctuate due to the shape and size of the concrete element.<\/span><\/p>\n<h2><span class=\"ez-toc-section\" id=\"Advantages-of-Steam-Curing-Process\"><\/span><b>Advantages of Steam Curing Process<\/b><span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p><span style=\"font-weight: 400;\">The key advantages of using the steam curing process are:<\/span><\/p>\n<ul>\n<li><span style=\"font-weight: 400;\">Steam curing provides the best solution in colder climates as it can facilitate the rapid hardening of concrete without sacrificing any strength.<\/span><\/li>\n<li><span style=\"font-weight: 400;\">High-early strength can be achieved.<\/span><\/li>\n<li><span style=\"font-weight: 400;\">Construction pace can be increased.<\/span><\/li>\n<li><span style=\"font-weight: 400;\">Steam curing provides one of the fastest strength developments in concrete.<\/span><\/li>\n<\/ul>\n<p><span style=\"font-weight: 400;\">So, time-sensitive construction projects are highly benefited from using the steam curing method.<\/span><\/p>\n<h2><span class=\"ez-toc-section\" id=\"Disadvantages-of-Steam-Curing-Process\"><\/span><b>Disadvantages of Steam Curing Process<\/b><span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p><span style=\"font-weight: 400;\">A few disadvantages of using the process are:<\/span><\/p>\n<ul>\n<li><span style=\"font-weight: 400;\">This method is not suitable for on-site curing methods.<\/span><\/li>\n<li><span style=\"font-weight: 400;\">Not effective on large surfaces.<\/span><\/li>\n<li><span style=\"font-weight: 400;\">The process demands skilled workers.<\/span><\/li>\n<li><span style=\"font-weight: 400;\">The initial cost of steam curing is higher compared to other methods.<\/span><\/li>\n<\/ul>\n<h2><span class=\"ez-toc-section\" id=\"-Summary\"><\/span><span style=\"font-weight: 400;\">\u00a0<\/span><b>Summary<\/b><span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p><span style=\"font-weight: 400;\">Steam curing is a highly effective method but costly. It is beneficial when dealing with concrete precast elements. Adequate curing after placing concrete is a vital requirement, as it can bring high strength, durability, volume stability, water-seal, and abrasion resistance. Adequately cured concrete does not crack under extreme weather conditions. Steam curing at atmospheric pressure is a suitable curing method in which high early strength is required and colder climates.<\/span><\/p>\n<h1><span class=\"ez-toc-section\" id=\"Frequently-Asked-Questions-FAQs\"><\/span><b>Frequently Asked Questions (FAQs)<\/b><span class=\"ez-toc-section-end\"><\/span><\/h1>\n<h3><span class=\"ez-toc-section\" id=\"What-is-the-minimum-curing-period\"><\/span><strong> What is the minimum curing period?<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p><span style=\"font-weight: 400;\"><strong>Ans<\/strong>: To get maximum strength, 28 days of curing is recommended.<\/span><\/p>\n<p><strong> When is steam curing preferred over other methods?<\/strong><\/p>\n<p><span style=\"font-weight: 400;\"><strong>Ans<\/strong>: Steam curing is preferred in colder climates and requires high early strength.<\/span><\/p>\n<p><strong> Why is an enclosure required for atmospheric pressure steam curing?<\/strong><\/p>\n<p><span style=\"font-weight: 400;\"><strong>Ans<\/strong>: An enclosure ensures minimum moisture loss, and the whole process becomes much more efficient.<\/span><\/p>\n<p><strong> What is the fastest way to cure concrete?<\/strong><\/p>\n<p><span style=\"font-weight: 400;\"><strong>Ans<\/strong>: Steam curing at high pressures can yield the best results in gaining high early strength.<\/span><\/p>\n<p><strong> Can I use steam curing for building construction?<\/strong><\/p>\n<p><span style=\"font-weight: 400;\"><strong>Ans<\/strong>: It is not an efficient process for on-site curing. Concrete precast elements are usually steam cured.<\/span><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Curing is a critical process that ensures the concrete\u2019s durability, strength, and longevity. It helps to accelerate the hydration of cement by controlling moisture and temperature. There are different concrete curing methods, and steam curing is one of them. Steam curing is an excellent way to push the concrete to reach its maximum potential faster. [&hellip;]<\/p>\n","protected":false},"author":2,"featured_media":100,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[5],"tags":[],"class_list":["post-99","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-concrete-curing"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v18.0 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>How the Concrete is Cured by Steam at Atmospheric Pressure? - Mir Concrete Block<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/mirconcreteblock.com\/blog\/how-the-concrete-is-cured-by-steam-at-atmospheric-pressure\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"How the Concrete is Cured by Steam at Atmospheric Pressure? - Mir Concrete Block\" \/>\n<meta property=\"og:description\" content=\"Curing is a critical process that ensures the concrete\u2019s durability, strength, and longevity. It helps to accelerate the hydration of cement by controlling moisture and temperature. There are different concrete curing methods, and steam curing is one of them. Steam curing is an excellent way to push the concrete to reach its maximum potential faster. 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