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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: Alkali Etching Tests on Concrete Aggregates
Author(s): Willard H. Parsons and Herbert Insley
Publication: Journal Proceedings
Appears on pages(s): 229-244
Abstract:A test for determining the reactivity of an aggre- gate with high-alkali cements is described, which consists of microscopic examination of polished sur- faces of rocks and minerals after etching in various alkaline hydroxide and sulfate solutions. Pure opal, opaline chert and opaline limestone are readily etched, while volcanic glass, certain feldspars, chal- cedony, calcite, and dolomite are slightly etched under some of these test conditions. Photomicrographs of etched rocks and minerals are included.
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