A self-sensing carbon nanotube/cement composite for traffic monitoring

摘要

In this paper, a self-sensing carbon nanotube (CNT)/cement composite is investigated for trafficmonitoring. The cement composite is filled with multi-walled carbon nanotubes whosepiezoresistive properties enable the detection of mechanical stresses induced by traffic flow. Thesensing capability of the self-sensing CNT/cement composite is explored in laboratory tests androad tests. Experimental results show that the fabricated self-sensing CNT/cement compositepresents sensitive and stable responses to repeated compressive loadings and impulsiveloadings, and has remarkable responses to vehicular loadings. These findings indicate that theself-sensing CNT/cement composite has great potential for traffic monitoring use, such as intraffic flow detection, weigh-in-motion measurement and vehicle speed detection.