Concrete cast in massive sections requires special consideration be given to handling the heat of hydration and the temperature rise after casting. Uncontrolled temperature rise can result in unacceptable surface cracks or internal damage to the concrete.
CTLGroup is a world leader in consulting services related to mass concrete technology. We have helped countless contractors, engineering/ design firms, and owners to write, adapt, understand and work within specifications for mass concrete elements and structures. CTLGroup can work with owners, engineers,architects, material suppliers, and contractors to develop project-specific thermal control plans based on thermal modeling. If necessary, these requirements can be supplemented and verified using laboratory tests.
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 | Precooling Mass Concrete
In this article, reproduced with permission from the August 2005 issue of Concrete Construction, principal engineer John Gajda and project partners Alfred Kaufman and Francisco Sumodjo discuss the use of liquid nitrogen to cool concrete for the massive foundations of the San Francisco-Oakland Bay Bridge. (Download PDF - 506 KB) |
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 | Controlling Temperatures in Mass Concrete
Reproduced with permission from Concrete International, the magazine of the American Concrete Institute: "Specifications generally limit temperatures in mass concrete to prevent cracking and durability problems. Temperature limits are specified to seemingly arbitrary values of 135 F (57 C) for the maximum allowable concrete temperature and 35 F (19 C) for the maximum allowable temperature difference between the center and surface of the mass concrete section. Typically, the contractor must meet all of the specification requirements, but without a good understanding of mass concrete, keeping concrete temperatures within limits can be a difficult task." (Download PDF - 132 KB) |
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 | Mass Concrete
Describes and answers questions about CTLGroup's mass concrete consulting services. (Download PDF - 247 KB) |
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 | Save Time and Money on Mass Concrete Construction
In this article reproduced with permission from Concrete Technology Today, Principal Engineer John Gajda discusses how consultation on placement of a massive bridge foundation saved 31 days in the construction cycle. (Download PDF - 595 KB) |
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 | Great Thickness Requires Great Lengths
As the need for larger, stronger, and more durable concrete bridge structures has grown, so have strategies to improve concrete performance. In this article from the January 2005 issue of Roads and Bridges, principal engineer John Gajda describes one approach. (Download PDF - 497 KB) |
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