期刊
JOURNAL OF MATERIALS IN CIVIL ENGINEERING
卷 26, 期 5, 页码 923-929出版社
ASCE-AMER SOC CIVIL ENGINEERS
DOI: 10.1061/(ASCE)MT.1943-5533.0000891
关键词
Cracking; Conductive surface sensor; Sensing skin; Concrete; Wireless sensing; Ring test; Shrinkage; RFID; Health monitoring; Shrinkage cracking
资金
- National Science Foundation under the NEES Program [CMMI-0724022]
- Oklahoma Transportation Center (OkTC)
- Oklahoma Center for Advancement of Science and Technology (OCAST)
This paper describes the results of an experimental study that uses radio frequency identification (RFID) technology to detect cracking in concrete elements. A RFID-based sensor is used to monitor the change in electrical resistance that occurs in conductive materials applied to the surface of the concrete. When the concrete substrate is strained, the conductive material at the surface is stretched, and its electrical resistance increases. If the concrete substrate is strained to the point where it cracks, the conductive material at the surface also cracks, causing its electrical resistance to increase by orders of magnitude. This paper describes how this increase in electrical resistance attributable to cracking can be detected wirelessly by RFID technology. To experimentally illustrate the application of this technology, an RFID-based sensor and conductive surface materials are used to detect cracking in the restrained ring test. The experimental results indicate that this technology can be easily implemented and successfully used for wireless crack detection in concrete and reinforced concrete members. The technology that is described in this paper is not limited to the laboratory environment and can be easily extended to field applications.
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