EIS based assessment of electrodeposition effect of concrete cracks: Experiment and equivalent model. (9th May 2023)

• Record Type: Journal Article
• Authors: Huang, Anlan; Chen, Qing; Xie, Linjun; Zhang, Qian; Sun, Yuxing; Li, Bin; Li, Wenting; Jiang, Zhengwu; Zhu, Hehua
• Is Part Of: Construction & building materials. Volume 377(2023)
• Publication Date: 2023-05-09
• Subjects: Electrodeposition repairing -- EIS -- Nondestructive test -- Concrete -- Crack; Building materials -- Periodicals; 624.18
• DOI: 10.1016/j.conbuildmat.2023.131080
• Languages: English
• ISSNs: 0950-0618

Abstract

Highlights: A non-destructive assessment method based on EIS is proposed to evaluate the effect of electrodeposition. Proposing the equivalent circuit model to describe and analyze the cracking and electrodeposition repair process. The influence of concrete's w/c ratio, crack width, and crack tortuosity on EIS have been calculated and discussed through equivalent circuit model. Abstract: In this study, the electrochemical impedance spectrum (EIS) is proposed to evaluate the effectiveness of concrete cracks repaired through electrodeposition. The EIS responses of the concrete cracking and electrodeposition repairing processes are investigated. The obtained results show that the impedance of concrete decreases with increasing crack width. The impedance of concrete increases gradually during the electrodeposition process. In order to characterize and forecast the EIS responses during the concrete cracking and electrodeposition repairing processes, a new equivalent circuit model is proposed. The crack repairing rates are defined in terms of the crack resistance and total impedance of concrete. After 14 days of electrodeposition repairing, the crack repairing rates can eventually reach 79.35% and 77.81% in terms of crack resistance and total impedance, respectively. In addition, the influences of the w/c ratio, crack width, and crack tortuosity of concrete on the EIS responses of concrete repaired by the electrodeposition process are calculated and discussed.