MODELING OF CHLORIDE DIFFUSION IN CONCRETE AND DETERMINATION OF DIFFUSION-COEFFICIENTS

In this paper a new form of mathematical model for chloride ingress in concrete is presented to review the process of chloride ingress in sa turated and unsaturated concrete. Material parameters reviewed are the ion diffusion coefficient and solution diffusion coefficient, both of which have been shown to be concentration dependent, rendering the ch loride diffusion process to be nonlinear. A simple experimental method ology and a calculation procedure are proposed enabling the estimation of chloride diffusion coefficients from experimentally determined chl oride and solution profiles in a short time.