Cement-based sensors with carbon fibers and carbon nanotubes for piezoresistive sensing |
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| Authors: | Faezeh Azhari Nemkumar Banthia |
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| Affiliation: | 1. Department of Architectural Engineering, Hanyang University, 222 Wangsimni-ro, Seongdong-gu, Seoul, 04763, Republic of Korea;2. School of Civil, Environmental and Architectural Engineering, Korea University, 145 Anam-ro, Seongbuk-gu, Seoul 02841, Republic of Korea;3. Future Strategy Center, Korea Railroad Research Institute, 176 Cheoldobangmulgwan-ro, Uiwang-si, Gyeonggi-do 16105, Republic of Korea;1. Faculty of Architectural, Civil Engineering And Environment, Ningbo University, 315000 Ningbo, China;2. School of Civil Engineering, Sichuan College of Architectural Technology, 618000 Deyang, Sichuan, China;3. School of Civil Engineering, Harbin Institute of Technology, 150090 Harbin, China;4. Key Lab of Structure Dynamic Behavior and Control (Harbin Institute of Technology), Ministry of Education, 150090 Harbin, China;5. Civil Engineering Department, Yancheng Institute of Technology, 224051 Yancheng, China;1. School of Architecture, Chosun University, 309 Pilmun-daero, Dong-gu, Gwangju 501-759, South Korea;2. Department of Civil and Environmental Engineering, Korea Advanced Institute of Science and Technology, Guseong-dong, Yuseong-gu, Daejeon 305-701, South Korea |
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| Abstract: | Electrically conductive cementitious composites carrying carbon fibers and carbon nanotubes were developed and their ability to sense an applied compressive load through a measureable change in resistivity was investigated. Two types of cement-based sensors, one with carbon fibers alone and the other carrying a hybrid of both fibers and nanotubes, were considered. Direct comparisons were also made with traditional strain gauges mounted on the sensor specimens.Sensing experiments indicate that under cyclic loading, the changes in resistivity mimic both the changes in the applied load and the measured material strain with high fidelity for both sensor types. The response, however, is nonlinear and rate dependent. At an arbitrary loading rate, the hybrid sensor, containing a combination carbon fibers and nanotubes, produced the best results with better repeatability. |
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