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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: Abnormal Cracking in Highway Structures in Georgia and Alabama
Author(s): Calvin C. Oleson
Publication: Journal Proceedings
Appears on pages(s): 329-354
Abstract:In 1947-1948, an investigation was made of abnormal cracking in concrete highway structures in Georgia and Alabama. Highway department records were searched for reliable data on cements and aggregates used in the con-struction. A preliminary analysis of the data indicated the possibility of alkali-aggregate reaction. Subsequent studies were made to determine probable average alkali contents of all cements included in the survey. It was found that three cements, all having average alkali contents of more than 0.6 percent, when used with-natural siliceous aggregates from Montgomery, Ala., and allied sources, were involved in the cracking. A restriction of alkali in cements was imposed in 1947. A continuing observation of the performance of approved cements in concrete in the two states has been in progress since the initial investigation. Visual observations, comprehensive soniscope tests, and precise measurement of length changes have been included in the studies. Extensive laboratory tests of aggregates have been undertaken.
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