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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 Binder Composition on Chloride Penetration Resistance of Concrete
Author(s): P. F. McGrath and R. D. Hooton
Publication: Special Publication
Appears on pages(s): 331-348
Keywords: Chlorides; concretes; diffusion; fly ash; mortars (materials); silica fume;
Abstract:Choosing the optimum cementing material system is a key question when designing a concrete structure to last for a long time in a chloride environment. There is a lack of reliable comparative information on the short and long term performance of cementing material blends, incorporating materials such as silica fume, fly ash and slag. In this contribution, various cementing material blends are examined for their potential ability to resist chloride ion penetration. A range of mixtures was tested to assist designers in material selection for concrete in a chloride environment. Silica fume, blast furnace slag, Class C and F fly ash were examined at 0.30 and 0.40 water to cementing materials ratios (w/cm) for mortars and concrete. Ternary blends of normal portland cement/slag/silica fume and normal portland cement/slag/fly ash were also tested. The diffusion coefficients were determined by chloride migration using a D.C. potential gradient, and by chloride pending/profile grinding. Silica fume was found to be essential to obtain low diffusion coefficients particularly at an early age. Some additional reduction in diffusion coefficient is obtained with ternary blends of silica fume plus slag or silica fume plus Class F fly ash.
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