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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: The Influence of Vibration, Consistency and Grading of Aggregate Upon the Desing of Concrete
Author(s): G. W. Hutchinson
Publication: Journal Proceedings
Appears on pages(s): 9-28
Abstract:Data supplement those previously published: "Con crete Aggreqate Development on the Claytor Hydr Project (ACI Journal January 1940). They are fror the results of several investigations in the Claytc laboratory of factors affecting the design of concrete which could not be fully reconciled with existing theory. The more important indications: I.-That an optimum gradation exists. for each aggregate or set of aggregates, when of given maximum size and combined with a given paste content, which provides maximum workability in concrete. Gradations of aggregate either finer or coarser than the optimum require additional mixing water to maintain equal workability. 2.-To maintain a given consistency of concrete, a greater water content per unit volume of concrete is required as the paste content is increased. 3.-The compressive strenath and durabilitv of con- crete especially in the mixtures sufficiently dry to re quire placement by vibration, are affected by the consistency of the concrete in a manner not definitely related to the water cement ratio except when the cement content is constant.
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