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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 Fly Ash Upon the Workability and Early Strength of Concrete
Author(s): D.W. Hobbs
Publication: Special Publication
Appears on pages(s): 289-306
Keywords: cement pastes; compacting; compressive strength;
concretes; fly ash; mix proportioning; slump tests; workability. --
Abstract:Workability and strength measurements made on concretes in which up to 20 per cent by weight of the aggregate was replaced by an equal volume of fly ash are described. This method of proportioning the concrete mix has the advantage that both the water-Portland cement ratio and the volume of the water-Portland cement fraction can be held constant so that the extent to which fly ash is inert or cementitious at early ages can be assessed. It is shown that the variations in slump are in broad agreement with the predictions for a Bingham suspension in which a proportion of the particles is replaced by an equal volume of finer particles and that the strength contribution attributed to the fly ash is dependent upon the water-Portland cement ratio.
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