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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: Influence of Drying on Strength
of Concrete Specimens
Author(s): C. D. Johnston and E. H. Sidwell
Publication: Journal Proceedings
Appears on pages(s): 748-755
Keywords: cracking (fracturing) ; drying; moisture content;plain concrete; shrinkage; specimens;tensile strength.
Abstract:Observed reductions in the 28 day strength of plain concrete specimens, dried in air before testing, are shown to agree with theoretical values calculated using a reduced effective cross-sectional area, which results when moisture diffusion from a specimen causes varying degrees of shrinkage across its cross section, to such an extent that cracking penetrates from the surface inwards. The results show that this reduction in tensile strength cannot exceed one third of the strength of the saturated concrete, and that it is independent of specimen size.
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