Baoguo Han et al 2009 Nanotechnology 20 445501 doi:10.1088/0957-4484/20/44/445501
Baoguo Han1,2, Xun Yu1 and Eil Kwon3
Show affiliationsIn this paper, a self-sensing carbon nanotube (CNT)/cement composite is investigated for traffic monitoring. The cement composite is filled with multi-walled carbon nanotubes whose piezoresistive properties enable the detection of mechanical stresses induced by traffic flow. The sensing capability of the self-sensing CNT/cement composite is explored in laboratory tests and road tests. Experimental results show that the fabricated self-sensing CNT/cement composite presents sensitive and stable responses to repeated compressive loadings and impulsive loadings, and has remarkable responses to vehicular loadings. These findings indicate that the self-sensing CNT/cement composite has great potential for traffic monitoring use, such as in traffic flow detection, weigh-in-motion measurement and vehicle speed detection.
07.07.Df Sensors (chemical, optical, electrical, movement, gas, etc.); remote sensing
72.20.Fr Low-field transport and mobility; piezoresistance
62.20.F- Deformation and plasticity
81.40.Lm Deformation, plasticity, and creep
62.25.-g Mechanical properties of nanoscale systems
81.07.-b Nanoscale materials and structures: fabrication and characterization
Condensed matter: electrical, magnetic and optical
Instrumentation and measurement
Issue 44 (4 November 2009)
Received 5 August 2009, in final form 14 September 2009
Published 7 October 2009
Baoguo Han et al 2009 Nanotechnology 20 445501
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