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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: An Interpretation of Some Published Researches on the Alkali-Aggregate Reaction
Part 2 - A Hypothesis Concerning Safe and Unsafe Reactions with Reactive Silica in Concrete
Author(s): T. C. Powers and H. H. Steinour
Publication: Journal Proceedings
Appears on pages(s): 785-812
Keywords: no keywords
Abstract:Enlarging on considerations set down in Part 1, the authors develop a hypothesis concerning reactions between reactive silica, calcium hydroxide, and alkali in concrete. The hypothesis is that the reaction proceeds safely or unsafely according to the relative amounts of calcium hydroxide and alkali absorbed in the outer part of the reacted layer of the opal particle. Published experimental data are analyzed according to the hypothesis with the aid of Kalousek's data on the lime-alkali-silica-water system. Several conclusions are drawn, bearing on safe limits of alkali content and safe silica-alkali ratios.
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