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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 > Publications > International Concrete Abstracts Portal
The International Concrete Abstracts Portal is an ACI led collaboration with leading technical organizations from within the international concrete industry and offers the most comprehensive collection of published concrete abstracts.
Title: Low Initial Curing Temperature Improves
the Strength of Concrete Test Cylinders
Author(s): B. D. Barnes, R. L. Orndorff, and J. E. Roten
Publication: Journal Proceedings
Appears on pages(s): 612-615
Keywords: compressive strength; concretes: curing; freezing;research: temperature.
Abstract:The curing temperature of concrete during the first 24 hr of hydration is important. When comparisons are made between concrete specimens cured at 35 F (2 C) as opposed to about 65 F (I 8 C) for the first 24 hr the lower temperature specimens exhibit strengths on the order of IO percent higher than those exposed to the higher temperature after a total of 28 days of curing. Concrete which has been moderately frozen initially may show higher compressive strengths than concrete which has been continuously cured at a temperature of 50 F (16 C) to 70 F (2 I C). Consequently it is believed that suitable comparisons between test cylinders prepared in accordance with ASTM C 3 I and in-place concrete can be made only when records of the ambient temperatures are available.
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