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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: Concrete Studies at the Bull Run Dam, City of Portland, Oregon
Author(s): T.C. Powers
Publication: Journal Proceedings
Appears on pages(s): 388-420
Abstract:The problem of estimating the strength of concrete containing aggregate too large for the test specimen is studied. In addition to the water-cement ratio, two more variables are introduced, (1) the paste content (paste is cement plus water) and, (2) the physical condition of the paste at the time of hardening, i.e., its homogeneity. The latter variable is shown to influence permeability as well as strength. The dependence of the water-cement-ratio-strength relation upon the other two variables is discussed, and conditions are cited under which it does not exist at all. The modulus of elasticity appears to be greatly influenced by the paste content.
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