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An effective diffusivity for sulfate transport into concrete

Authors
Journal
Cement and Concrete Research
0008-8846
Publisher
Elsevier
Publication Date
Volume
25
Issue
6
Identifiers
DOI: 10.1016/0008-8846(95)00108-o

Abstract

Abstract The effective non-steady state diffusivity of sulfate ingress from a mixed sulfatechloride solution into Type 50 cement concrete was determined from concentration profiles at various times up to five years. Furthermore, the influence of CO 2 saturation on the effective diffusivity was determined. The time dependence of the effective non-steady sulfate diffusivities were, log (D effective sulfate) = − 6.6543 − 0.7626 log (t) and, log(D effective sulfateCO 2) = − 6.2873 − 0.8559 log(t) where D effictive sulfaterepresents the effective sulfate diffusivity, D effective sulfate CO 2 represents the effective sulfate diffusivity of the solution saturated with respect to CO 2, and t represents the time ( months).

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