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Founded in 1904 and headquartered in Farmington Hills, Michigan, USA, the American Concrete Institute is a leading authority and resource worldwide for the development, dissemination, and adoption of its consensus-based standards, technical resources, educational programs, and proven expertise for individuals and organizations involved in concrete design, construction, and materials, who share a commitment to pursuing the best use of concrete.
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Home > Tools > Frequently Asked Questions
Q. Can the test results of concrete specimens at 28 days be accepted if the specimens were cured at a temperature of 104ºF (40ºC)? A. Curing at high temperatures will accelerate the initial strength gain of concrete. Specimens for acceptance of concrete should always be cured at the standard temperatures given in the standard. If these were field cured specimens that were being used to determine stripping time of formwork or prestressing strength, then the specimens should be cured as close as possible to the environment of the structure. If they are specimens for acceptance of the concrete, then they should be cured at the prescribed temperatures. References: ACI 301-20; ACI 311.6-18 Topics in Concrete: Testing of Concrete
Q. Can the test results of concrete specimens at 28 days be accepted if the specimens were cured at a temperature of 104ºF (40ºC)?
A. Curing at high temperatures will accelerate the initial strength gain of concrete. Specimens for acceptance of concrete should always be cured at the standard temperatures given in the standard. If these were field cured specimens that were being used to determine stripping time of formwork or prestressing strength, then the specimens should be cured as close as possible to the environment of the structure. If they are specimens for acceptance of the concrete, then they should be cured at the prescribed temperatures.
References: ACI 301-20; ACI 311.6-18
Topics in Concrete: Testing of Concrete
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