Crack Closure and Chloride Extraction of Concrete by Electrodeposition Method

摘要

In this paper we present the electrodeposition method as a means of repair for deteriorated and cracked concrete structures and investigate the effects of this method on various concrete properties. We investigated the effects of electrodeposition on phi 10 X 20 cm concrete specimens with embedded reinforcing steel. After causing the specimens to crack under a specified load, we immersed them in a solution, and then imparted a constant current between the embedded steel in concrete and an electrode in the solution for 12 weeks. Afterwards, we examined and evaluated the weight change of the specimens, the degree of crack closure, the chloride concentration, and polarization curve. The results indicate that electrodeposits can close concrete crack. In addition, our investigation shows that electrodeposition method has effect of chloride extraction from concrete.