期刊
CEMENT & CONCRETE COMPOSITES
卷 34, 期 6, 页码 794-800出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.cemconcomp.2012.02.012
关键词
Cement-based composites; Carboxyl multi-walled carbon nanotube; Pressure-sensitivity; Resistance; Capacitance
资金
- US National Science Foundation [CMMI-0856477]
- Federal Highway Administration (FHWA) of US Department of Transportation [DTFH61-10-C-00011]
- Northland Advanced Transportation Systems Research Laboratory (NATSRL) of the University of Minnesota Duluth
- ITS of the University of Minnesota
- National Science Foundation of China [50808055, 51178148]
- Ministry of Science and Technology of China [2006BAJ03B05]
- Natural Scientific Research Innovation Foundation in Harbin Institute of Technology [HIT. NSRIF. 2009096]
- Directorate For Engineering [0856477] Funding Source: National Science Foundation
- Div Of Civil, Mechanical, & Manufact Inn [0856477] Funding Source: National Science Foundation
In this study, electrical characteristics of pressure-sensitive carboxyl multi-walled carbon nanotube (MWNT)/cement composites with and without compressive loading were investigated. Experimental results indicate that the carboxyl MWNT/cement composites have both resistance and capacitance characteristics. Capacitance is insensitive to compressive loading, but the charging of the capacitor causes a linear increase in the measured resistance during DC measurement. The reversible pressure-sensitive responses of resistance to compressive loading can be extracted by removing the linear increase component. An AC measurement method can also be used to eliminate the effect of capacitor charging and discharging on the pressure-sensitive responses of carboxyl MWNT/cement composites. (C) 2012 Elsevier Ltd. All rights reserved.
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