Effect of Pulse Parameters on Deposition in Concrete Crack using Pulse Current Electro-deposition

Abstract

To evaluate the effect of pulse parameters on the formation of electrodeposits in concrete cracks, five different types of pulse current were set up, and ZnSO₄ and MgSO₄ solutions were used as the electrolytes. The rate of weight gain, rate of surface coating, rate of crack closure and crack filling depth were measured. Scanning electron microscopy was used to assess the morphology of the electrodeposits, and energy dispersive spectroscopy was used to analyze the mineral composition of the electrodeposits in the cracks. The experimental results demonstrate that, among five different pulse parameters, when T _on/T _off=0.8 ms/0.8 ms, the healing effect of electro-deposition is the best. The pulse mode hardly affects the mineral composition of the electrodeposits but changes the micromorphology. In addition, for both ZnSO₄ and MgSO₄ solutions, when T _on/T _off=0.8 ms/0.8 ms, the crystal structure of the electrodeposits is the most uniform and the densest.

Keywords

pulse electro-deposition / repair of concrete cracks / pulse parameters / healing effect