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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: Effect of Various Coarse Aggregates Upon the Cement-Aggregate Reaction
Author(s): C. H. Scholer and W. E. Gibson
Publication: Journal Proceedings
Appears on pages(s): 1009-1032
Abstract:Concrete made with native Kansas sand-gravel (an aggregate containing little coarse material) began, about 1930, to show abnormal expansion, map cracking and loss in flexural strength. Tests were made by the Engineering Experiment Station at Kansas State College, in cooperation with several other agencies, to determine the causes of and prescribe cures for this condition. Concrete samples were made with 24 different cements using two trouble-making aggregates and were submitted to varying exposure tests. It was found that deterioration varied with the different cements, but there was no consistent relation between cement composition and extent of deteriorarion. Hence it was concluded that the cement-aggregate reaction causing deterioration was not primarily an alkali-aggregate reaction. Extensive tests on concrete made of sand gravel combined with some coarser aggregates indicate reduced expansions and less tendency toward deterioration. Addition of 25 percent or more (by weight) coarse limetone is adequate sandstone, as much as 40 percent may be required.
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