Use of electrochemical method for repair of concrete cracks

With the ZnSO4 and MgSO4 solutions, the impact of electrolyte solution concentration on the electrodeposition healing effect was investigated, four parameters (i.e., rates of weight gain, surface coating, crack closure and crack filling depth) were measured, the mineral composition and appearance of electrodeposit in the cracks were analyzed. The results demonstrate that, regardless of how to select electrolyte solution concentration, the healing speed of cracks is the fastest during the 5 days at the beginning and the cracks basically complete healing after 20 days. In both solutions, rates of weight gain, surface coating, crack closure and crack filling depth decrease with the increase of electrolyte solution concentration. The microscopic analysis shows that the concentration of the electrolyte solution has no impact on the composition of the sediment, only affecting its morphology.