Abstract
In this study, the electrochemical impedance spectrum (EIS) is proposed to evaluate the effectiveness of concrete cracks repaired through electrodeposition. The EIS responses of the concrete cracking and electrodeposition repairing processes are investigated. The obtained results show that the impedance of concrete decreases with increasing crack width. The impedance of concrete increases gradually during the electrodeposition process. In order to characterize and forecast the EIS responses during the concrete cracking and electrodeposition repairing processes, a new equivalent circuit model is proposed. The crack repairing rates are defined in terms of the crack resistance and total impedance of concrete. After 14 days of electrodeposition repairing, the crack repairing rates can eventually reach 79.35% and 77.81% in terms of crack resistance and total impedance, respectively. In addition, the influences of the w/c ratio, crack width, and crack tortuosity of concrete on the EIS responses of concrete repaired by the electrodeposition process are calculated and discussed.
Published Version
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