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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: Crystal Growth In Entrained-Air Voids
Author(s): Bryant Mather
Publication: Special Publication
Appears on pages(s): 105-106
Abstract:Crystals are found in some entrained-air voids of all concrete that has been "left out in the rain" or stored while damp. These crystals can be observed through petrographic examination of thin or ground concrete sections at normal magnification. If the concrete was made using a cement with a high tricalcium aluminate (C3A) content (over 8%), it is likely that areas in it will be covered with ettringite crystals - secondary ettringite.
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