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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: Autogenous Healing of Cement Paste
Author(s): Kenneth R. Lauer and Floyd 0. Slate
Publication: Journal Proceedings
Appears on pages(s): 1083-1098
Keywords: no keywords
Abstract:It is a recognized fact that cracks in concrete sometimes become "healed." This paper reports a study of the nature of the healing action, and of the increases in tensile strength measured perpendicular to the plane of the crack. Study was made of effects on healing of time of healing, conditions of curing, additions of lime and of fly ash, and cycles of wetting and drying. The healing action is caused by formation of crystals of calcium carbonate and calcium hydroxide in the cracks. Healing can increase tensile strength from 0 psi to 25 percent of normal tensile strength. It occurs far more rapidly under water than in air. Additions of lime and fly ash have little effect.
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