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Sensors 2018, 18(9), 2999; https://doi.org/10.3390/s18092999

Intrinsic Sensing Properties of Chrysotile Fiber Reinforced Piezoelectric Cement-Based Composites

1,2,3,* , 1,2,* , 1,4
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1
School of Civil Engineering, Qingdao University of Technology, Qingdao 266033, China
2
Collaborative Innovation Center of Engineering Construction and Safety in Shandong Blue Economic Zone, Qingdao University of Technology, Qingdao 266033, China
3
Center for Infrastructure Engineering, School of Computing, Engineering and Mathematics, Western Sydney University, Sydney, NSW 2751, Australia
4
Department of Architecture Engineering, Dezhou Technology Vocational College Qingdao Campus, Qingdao 266232, China
5
School of Architecture Engineering, Qingdao Agricultural University, Qingdao 266109, China
*
Authors to whom correspondence should be addressed.
Received: 8 August 2018 / Revised: 5 September 2018 / Accepted: 6 September 2018 / Published: 7 September 2018
(This article belongs to the Special Issue Piezoelectric Transducers: Advances in Structural Health Monitoring)
Full-Text   |   PDF [3078 KB, uploaded 7 September 2018]   |  

Abstract

Lead-zirconate-titanate (PZT) nanoscale powder was first synthesized by the sol-gel method, then PZT and 0–3 type PZT/chrysotile fiber (CSF)/cement composite (PZTCC) wafers were fabricated after grind-mixing PZT powder with strontium carbonate and/or cement, ductile CSF in tandem with press-sintered process, respectively. The crystal structure (XRD), microstructure (SEM), piezoelectric properties after surface silver penetration, and polarization of the PZT and PZTCC wafer were investigated. Furthermore, self-sensing responses under either impulse or cyclic loading and micro-hardness toughness of PZTCC were also investigated. Results show that the incorporation of CSF and cement admixture weakens the perovskite crystalline peak of PZTCC; reduces the corresponding piezoelectric coefficient from 119.2 pC/N to 32.5 pC/N; but effectively bridges the gap on the toughness between PZTCC and concrete since the corresponding microhardness with 202.7 MPa of PZTCC is close to that of concrete. A good linear and fast electrical response against either impulse or cyclic loading of the PZTCC is achieved with their respective sensitivity, linearity, and repeatability to 1.505 mV/N, 2.42%, and 2.11%. The sensing responses and toughness of PZTCC is encouraging as an intrinsic piezoelectric sensor for real-time health monitoring of ductile concrete structures. View Full-Text
Keywords: structural health monitoring; intrinsic sensor; piezoelectric cement-based composite; chrysotile fiber reinforcing; piezoelectric property structural health monitoring; intrinsic sensor; piezoelectric cement-based composite; chrysotile fiber reinforcing; piezoelectric property
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).
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Luo, J.; Zhang, C.; Li, L.; Wang, B.; Li, Q.; Chung, K.L.; Liu, C. Intrinsic Sensing Properties of Chrysotile Fiber Reinforced Piezoelectric Cement-Based Composites. Sensors 2018, 18, 2999.

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