Northland Advanced Transportation Systems Research Laboratories

نویسنده

  • Xun Yu
چکیده

Traffic flow sensors are import devices to provide inputs for traffic management applications. This NATRL seed project explores the piezoresistive property of the CNT/cement composite and its feasibility as an embedded stress sensor for to detect traffic flow. The experimental results show that the electrical resistance of the CNT/cement composites changes proportionally to the compressive stress levels indicating the potential of using the CNT/cement composite as a stress sensor for civil structures. The piezoresistive responses of composite with two different fabrication methods and CNT doping levels were also studied. It is found that the CNT dispersion-assistant surfactant could block the contacts among carbon nanotubes thus impair the piezoresistive response of the composite, while a higher CNT doping level could improve the sensitivity of the composite stress response. Currently, the piezoresistive property of the CNT/cement composite is being applied to develop an in-pavement traffic flow sensor.

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تاریخ انتشار 2008