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| Effects of Environment and Fatigue on the Piezoresistivity of Carbon Nanotube/Cement Composite |
| LI Jin-lu1, FENG Zi-qiang2, WU Jia-jie3, WEI Shan-shan3, GE Zhi3 |
1. Tai'an Transportation Bureau, Tai'an Shandong 271000, China;
2. Jinan Jinnuo Highway Engineering Supervision co., LTD, Jinan Shandong 250101, China;
3. School of Civil Engineering, Shandong University, Jinan Shandong 250061, China |
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Abstract The effects of environment and fatigue on the electrical resistance and piezoresistivity of the carbon nanotube/cement composite is investigated under a service environment using a four-probe method. The main influencing factors include temperature (20, 30, 40℃, and 50℃), water content (0%-6.4%), temperature and water content coupling, and number of fatigue cycles (20, 40, 60, 110, 160, and 240×103). Test results showed that environment and fatigue considerably affected resistivity and piezoresistivity. The resistivity of the composite decreased as water content increased. When water content changed from 1.3% to 5.8%, resistivity was reduced 43%. By contrast, piezoresistivity and change in resistance initially increased and then decreased as water content increased. Temperature substantially affected resistivity and piezoresistivity. As temperature increased, resistivity decreased but piezoresistivity increased. Electrical resistance and change in resistivity exhibited a strong linear relationship with temperatures ranging from 20℃ to 50℃ with an R2 of over 0.99. As temperature increased from 20℃ to 50℃, resistivity decreased 35% and change in resistivity increased 84%, thereby indicating improved piezoresistivity. Piezoresistive sensitivity to temperature demonstrated a strong negative linear relationship with water content with an R2 of 0.915. Electrical resistance and piezoresistivity increased as the number of cycles increased. The major causes of changes in resistivity and piezoresistivity are a change in tunneling conduction and the development of micro-cracks.
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Received: 04 August 2017
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| Fund:Supported by the National Natural Science Foundation of China (No.51108247) |
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Corresponding Authors:
LI Jin-lu
E-mail: ljl7103@163.com
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[1] CHEN P W, CHUNG D D L. Carbon Fiber Reinforced Concrete for Smart Structures Capable of Non-destructive Flaw Detection[J]. Smart Materials and Structures, 1993, 2(1):22-30.
[2] HAN B G, OU J P. Embedded Piezoresistive Cement-based Stress/strain Sensor[J]. Sensors and Actuators A:Physical, 2007, 138(2):294-298.
[3] ⅡJIMA S. Helical Microtubules of Graphitic Carbon[J]. Nature, 1991, 354(6348):56-58.
[4] RUOFF R S, TERSOFF J, LORENTS D C, et al. Radial Deformation of Carbon Nanotubes by Van der Waals Forces[J]. Nature,1993,364(6437):514-516.
[5] WANSOM S, KIDNER N J, WOO L Y, et al. AC-impedance Response of Multi-walled Carbon Nanotube/cement Composites[J]. Cement and Concrete Composites, 2006, 28(6):509-519.
[6] LI G Y, WANG P M, ZHAO X, et al. Pressure-sensitive Properties and Microstructure of Carbon Nanotube Reinforced Cement Composites[J]. Cement and Concrete Composites, 2007, 29(5):377-382.
[7] LI Geng-ying, WANG Pei-ming. Effect of Surface Treatment on Volume Resistance and Sensing Effect of Carbon Nanotube-reinforced Cement Composites[J]. Sichuan Building Science,2007,33(6):143-136.(in Chinese)
[8] LI Geng-ying, YANG Jing, ZENG Ling-bo, et al. Piezoresistivity of Carbon Nanotube-Cement Motars Modified by Styrene-Butadiene Rubber Emulsion[J]. Journal of Building Materials, 2013, 16(1):65-69.(in Chinese)
[9] LUO Jian-lin. Fabrication and Functional Properties of Multi-Walled Carbon Nanotube/Cement Composites[D]. Harbin:Harbin Institute of Technology, 2009.(in Chinese)
[10] HAN B G, YU X, OU J P. Effect of Water Content on the Piezoresistivity of MWNT/cement Composites[J]. Journal of Materials Science, 2010, 45(14):3714-3719.
[11] HAN B G, ZHANG K, YU X, et al. Electrical Characteristics and Pressure-sensitive Response Measurements of Carboxyl MWNT/cement Composites[J]. Cement and Concrete Composites, 2012, 34(6):794-800.
[12] JIANG Hai-feng. Self-sensing Carbon Nanotube Cement-based Composites and Their Application in Traffic Detection[D]. Harbin:Harbin Institute of Technology, 2009.(in Chinese)
[13] YAO Bin. Influence of Environmental Conditions on Piezoreresistive Effect of Carbon Nanotube Fiber Concrete[D]. Harbin:Harbin Institute of Technology, 2013.(in Chinese)
[14] MA Xue-ping. Piezoresistivity of Carbon Nanotubes-cement Composite[D]. Jinan:Shandong University, 2013.(in Chinese)
[15] ZUO Jun-qing. Research on Pressure-sensitive Properties of Carbon Nanotube-carbon Fiber/Cement Composites under Low Stress[J]. Fly Ash Comprehensive Utilization, 2013(2):12-15.(in Chinese)
[16] MENG Jing. Piezoresistive Properties and Conductive Mechanism of High Dispersion Carbon Nanotube-Cement Based Composites[D]. Harbin:Harbin Institute of Technology, 2014.(in Chinese)
[17] LIU Xiao-yan, LIU Yan, MING Wei, et al. Study on the Electrical Conductivity and Pressure Sensitive of Carbon Nanotubes/Cement-based Composite Materials[J]. Fly Ash Comprehensive Utilization, 2015(2):6-9.(in Chinese)
[18] LIU Xiao-yan, Fu Feng, LIU Jing, et al. Feasibility Research of Carbon Nanotube/cement Composites used for Structural Stress Monitoring[J]. Fly Ash Comprehensive Utilization, 2015(4):8-11.(in Chinese)
[19] WANG Qin, WANG Jian, LIU Bo-wei, et al. Stress-sensing Performance of MWCNTs Cement Composites[J]. Bulletin of the Chinese Ceramic Society,2016,35(9):2733-2740.(in Chinese)
[20] YU X, KWON E. Carbon Nanotube Based Self-Sensing Concrete for Pavement Structural Health Monitoring[R].Duluth:University of Minnesota Duluth, 2012.
[21] LI C, THOSTENSON E T, CHOU T W. Dominant Role of Tunneling Resistance in the Electrical Conductivity of Carbon Nanotube-based Composites[J]. Applied Physics Letters, 2007, 91(22):162-193.
[22] QIAO L, ZHENG W T, WEN Q B, et al. First-principles Density-functional Investigation of the Effect of Water on the Field Emission of Carbon Nanotubes[J]. Nanotechnology, 2007, 18(15):625-637.
[23] CHEN C W, LEE M H, CLARK S J. Gas Molecule Effects on Field Emission Properties of Single-walled Carbon Nanotube[J]. Diamond and Related Materials, 2004, 13(4):1306-1313.
[24] TOMBLER T W, ZHOU C W, ALEXSEYEV L, et al. Reversible Electromechanical Characteristics of Carbon Nanotubes under Local-probe Manipulation[J]. Nature,2000, 405(6788):769-772. |
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2018, Vol. 12 
