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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: What Do We Know about the Contribution of Fly Ash to the Strength of Concrete?
Author(s): Sandor Popovics
Publication: Special Publication
Appears on pages(s): 313-332
Keywords: compressive strength; concretes; fly ash; mineral
admixtures; portland cements; quartz; water-cement ratio; water-cementitious
Abstract:Experiments are reported where the strength development of concretes is investigated containing 75% by weight of portland cement and 25% fly ash with various water-cementitious materials ratios. The strength results of these concretes are compared not only to concretes containing no mineral admixtures but also to concretes containing 75% by weight of portland cement and 25% quartz powder. New as well as old experimental data seem to in-dicate that the contribution of fly ash to the quality of concrete is not a constant value determined solely by the physical and chemical characteristics of the fly ash but rather it can vary in different concretes. For instance, the relative contribution of a fly ash to concrete strength is increasing with decreasing water-cementitious materials ratio. The paper closes with a discussion of research needed for the clarification of the factors that maximize the contribution of fly ash to the strength of concrete.
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