Abstract
This paper aims to develop the evaluation method of chloride penetration in cracked concrete. The method is based on a simple apparent diffusion theory of chloride through concrete, enabling the prediction by obtaining the data at periodic inspection. Considering the chloride distribution in crack and mass preservation rule of chloride ion and applying different boundary chloride conditions to cracked portion and other surface, chloride penetration in cracked concrete can be predicted numerically in case of the wetting condition and cyclic wetting and drying condition. And effects of crack widths and apparent diffusion coefficient inside crack can be evaluated numerically.