2017 Volume 71 Issue 1 Pages 295-301
Electrochemical non-destructive inspection of steel corrosion needs to use electric equivalent circuit model. Electric characteristics of hardened cementitious materials change according to mix proportion and chloride content. However, the relationship between the electric equivalent model and chloride content has not been clarified. Therefore, this study was performed to find out the effects of chloride content on the electric equivalent circuit model of the hardened cementitious materials. Previous studies have reported that the pore structure and the ion composition of the pore solution change due to chloride content. The hardened cementitious materials permeated chloride ions were used in this study. The effects of the pore structure and the ion composition of the pore solution on the electric equivalent circuit model of hardened cementitious materials were examined.
It is found that chloride ions affect the surface potential of pores. The charge transfer resistance of the cementitious materials permeated chloride ions can be evaluated by the pore structure, the ion compositions of the pore solution and chloride contents.
