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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: Water-Cement Ratio Versus Strength-Another Look
Author(s): Herbert J. Gilkey
Publication: Journal Proceedings
Appears on pages(s): 1287-1312
Abstract:The water-cement ratio (W/C) pronouncement prob- ably marked the most useful and significant advance in the history of concrete technology. From the beginning, however, there have been dissenters who in their tests or research have happened to touch areas of unusual gradings or areas that entailed com- parisons between mortars and concretes or between neat cement pastes and sond-cement mortors. Besides the actual dissenters there have been thoughtful operators in the area of large-aggregate concrete, used regularly in dams, who on possible effects o recognizing the lock of information large aggregates and/or large specimens on strength hove serious doubts as to whether or nor the moss concrete in the structure would develop the strength that the W/C relationship has allocated to it. With current attention being redirected toward possible limitations in the W/C generalization, now may be the time to exhume and pull together scattered pertinent evidence that hos, bit-by-bit over the years been pre- sented, and forthwith become buried in the voluminous literature of concrete. The aim is not to discredit the water-cement ratio as a useful empiricism but rather to focus attention on both its range of applicability and on its limitations. The paper calls attention to, and discusses briefly, a number of the published allegations of invalidity, indicat- ing some of the pros and cons brought out in discussions thereof. As support for tentative explanations, pertinent stress-strain and water-gain data ore presented. Finally a modified, duly restricted and qualified version of a W/C versus strength relationship is proposed.
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