The corrosion progresses at the crack in the some existing reinforced concrete
structures, and the life cycle is finished. So, the life cycle must be set considering the macrocell corrosion at the crack. From the above background, recently the experiment and analysis on the microcell and macrocell corrosions in reinforced concrete have been investigated. However, there is no model which analyses the corrosion rate of reinforced concrete considering the corrosion cell formation pattern.
Therefore, in order to set the life cycle of reinforced concrete structure, it is
necessary to establish the analytical model for the corrosion rate induced by the cracks and the chloride ions rate. For the first step, in this study, the basic method for analyzing the microcell and macrocell corrosion rates is proposed. Herein, input data in this model are the polarization curve, the mortar resistance and the polarization resistance, while output data are the microcell and macrocell corrosion current densities. Besides, the validity of the corrosion rate analytical model is qualitatively checked by the verification experiment using mortar specimen with the slit which simulated the crack and the cold joint.