期刊
MATERIALS
卷 12, 期 3, 页码 -出版社
MDPI
DOI: 10.3390/ma12030519
关键词
reinforced concrete; piezoelectric; electromechanical; impedance; corrosion
类别
资金
- National Natural Science Foundation of China [51678234, 51778632, 51408614, U1434204]
- National Key Research and Development Program of China [2017YFE0120900]
- Hunan Provincial Natural Science Foundation of China [2015JJ2069, 2017JJ3385]
- China Postdoctoral Science Foundation [2016M600675, 2017T100647]
- Basic Research on Science and Technology Program of Shenzhen [JCYJ20170818143541342]
An embedded piezoelectric transducer was developed for monitoring the corrosion process of reinforcement bars in concrete based on the piezoelectric impedance technique. The electrochemical method was employed to accelerate the corrosion process of the reinforcement bar with relative mass loss of 0.5-10%, and the resistance spectra of the piezoelectric transducers were investigated to assess the corrosion process. The results show that the corrosion process of the reinforcement bar has significant influence on the resistance spectra of the piezoelectric transducers. Statistical parameters were used to intuitively evaluate the corrosion evolution based on variations of the resistance spectra. The corrosion process of reinforcement bar in concrete can be classified into three periods; that is, the initial period when the relative mass loss is less than 2%, the developing period at a relative mass loss of 2-4%, and the rapid corrosion period when the relative mass loss is higher than 4%.
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