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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: Effect of Non-Linear Chloride Binding on the Prediction of Chloride Penetration Into Concrete Structures
Author(s): L. O. Nilsson, M. Massat, and L. Tang
Publication: Special Publication
Appears on pages(s): 469-486
Keywords: binders (materials); chlorides; diffusivity; finite difference theory; penetration tests; Materials Research
Abstract:Fick's second law is usually used to predict the penetration of chloride ions into concrete. The diffusion coefficient depends on the chloride binding properties. Since the chloride binding capacity varies with chloride concentration, the diffusion coefficient is not a constant. This may introduce large errors in predicting the chloride penetration using constant diffusion coefficients experimentally determined at high chloride concentrations. The effects of nonlinear chloride binding and nonconstant diffusion coefficients are calculated with the finite difference method. The effects are shown to be significant on the results of diffusion cell experiments, immersion tests, and predicted chloride penetration. Predicted chloride profiles coincide well with accurate laboratory and field test results.
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