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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: Chloride Permeability of Fly Ash-Cement Pastes and Mortars
Author(s): D. M. Roy, R. I. A. Malek, and P. H. LicastroI
Publication: Special Publication
Volume: 100
Issue:
Appears on pages(s): 1459-1476
Keywords: blended cements; cement pastes; chlorides; diffusion; fly ash; mortars (material); permeability; Materials Research
Date: 4/1/1987
Abstract:Results of an accelerated electro-osmosis experiment to determine the effectiveness of different cement/fly-ash blends (cured for 28 days) in resisting chloride ion diffusion are presented. Effects of curing temperature, water-cementitious materials ratio, presence of sand, etc., on the chloride ion migration were determined. Class F fly ashes increase the effectiveness of the blend to resist chloride ion migration at any fly ash replacement level. The effect increases with increasing percentages of replacement. This is possibly due to the strong interactions between Class F fly ash or its reaction products with cement and ionic species in pore fluids. A higher replacement level, on the other hand, is required to significantly decrease chloride ion diffusion in cement/Class C fly-ash blends.
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