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

作　　者：储洪强 WANG Tingting JIANG Linhua XU Yi SONG Zijian XU Ning ZHAO Sujing 

机构地区：[1]College of Mechanics and Materials, Hohai University [2]Nanjing Hydraulic Research Institute

出　　处：《Journal of Wuhan University of Technology(Materials Science)》2018年第4期908-914,共7页武汉理工大学学报（材料科学英文版）

基　　金：the National Natural Science Foundation(Nos.51479051,51778209,51609075,and 51508158);the Fundamental Research Funds for the Central Universities(2016B08414);the National Key R&D Program of China(Nos.2016YFC0401610 and2016YFC0401804)

摘　　要：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 ZnSO_4 and MgSO_4 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 ZnSO_4 and MgSO_4 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.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 ZnSO_4 and MgSO_4 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 ZnSO_4 and MgSO_4 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.

关 键 词：pulse electro-deposition repair of concrete cracks pulse parameters healing effect 

分 类 号：TU528[建筑科学—建筑技术科学]