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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: Influence of Aggregate Restraint on the
Shrinkage of Concrete
Author(s): D. W. Hobbs
Publication: Journal Proceedings
Appears on pages(s): 445-450
Keywords: aggregate gradation; aggregates; bulk density;
cement pastes; lightweight aggregates; modulus of elasticity;
shrinkage; water content.
Abstract:A comparison is made of the various models which have been proposed to predict the dependence of concrete shrinkage upon the properties of its constituents and the aggregate volume concentration. The predictions of one of these models, the Cement and Concrete Association model, are compared in a general way with the observed shrinkagebehavior of concrete. It is shown that the shrinkage of normal aggregate concretes is dependent primarily on only three parameters-the paste shrinkage, the aggregate shrink-age, and the aggregate volume concentration. The observed dependence of concrete shrinkage upon original water content by weight, Young’s modulus of the concrete and aggregate grading, for specimens of the same water-cement ratio, is shown to follow directly from the simple depen-dence of concrete shrinkage upon aggregate volume concen-tration. [Author]
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