Use of electrochemical method for repair of concrete cracks

作者：Chu Hongqiang; Jiang Linhua^*; Xiong Chuansheng; You Lushen; Xu Ning

来源：Construction and Building Materials, 2014, 73: 58-66.

DOI：10.1016/j.conbuildmat.2014.09.031

• Electrodeposition
• Repair of concrete cracks
• Electrolyte solution concentration
• Healing effect

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.

• 出版日期2014-12-30
• 单位水利部交通运输部国家能源局南京水利科学研究院; 河海大学