ABSTRACT
In this study, we investigated the electrical properties of silane-based impregnated mortar to quantitatively evaluate the effect of silane-based impregnation on the mitigation of chloride ions penetration. Electrical resistivity and frequency characteristics were measured using electrochemical impedance spectroscopy on mortar specimens simulating the incomplete modification effect and deterioration of the silane-based impregnating. The diffusion coefficients of chloride ions were also determined by chloride migration tests. As a result, we found a correlation between the electrical resistivity and the effective diffusion coefficient of chloride ions. Using the frequency response of impedance, the electrical resistivity of the silane-impregnated layer and that of the unimpregnated mortar could be extracted in a single measurement. These results showed the possibility of quantitatively evaluating the effect of silane-based impregnation on the mitigation of chloride ions penetration from the electrical properties of silane-impregnated mortars.
