Chloride-induced corrosion of reinforcement in concrete bridges is a very complex process. A robust mathematical model capable of predicting the duration of the initiation period has not yet been developed. In this paper the widely used analytical solution to Fick's second law of diffusion has been used to illustrate the application of random field theory in the probabilistic estimation of the duration of the initiation period in bridges. In this study site data has been used to determien the probability density functions of the apparent diffusion coefficient D_app and surface chloride concentration C_s.
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