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Accession Number PB2012-114250
Title Intelligent Pavement for Traffic Flow Detection: Phase II.
Publication Date Sep 2012
Media Count 33p
Personal Author X. Yu
Abstract This project is the extension of a Northland Advanced Transportation System Research Laboratory (NATSRL) FY09 project, titled as Intelligent Pavement for Traffic Flow Detection, which aims to explore a new approach in detecting vehicles on a roadway by making a roadway section as a traffic flow detector. Sections of a given roadway are paved with carbon-nanotube (CNT) enhanced pavement; the piezoresitive property of carbon nanotubes enables the pavement to detect the traffic flow. Meanwhile, CNTs can also work as reinforcement elements to improve the strength and toughness of the concrete pavement. The proposed sensor is expected to have a long service life with little maintenance and wide-area detection capability. In the FY09 project, lab tests demonstrated that CNT based cement composite can detect the mechanical stress levels for both static and dynamic loads. In the FY10 project, the research was extended to cement mortar, which has much higher mechanical strength and more useful in real applications. The effects of water level and CNT doping levels on the piezoresistivity of the composites were also studied. Preliminary road tests were performed for the evaluation of this new traffic sensor.
Keywords Carbon nanotube
Concrete pavements
Dynamic loads
Performance evaluation
Resistivity method
Traffic flow
Vehicle detectors

Source Agency Department of Transportation Office of University Research
NTIS Subject Category 91B - Transportation & Traffic Planning
43G - Transportation
85H - Road Transportation
50A - Highway Engineering
Corporate Author Minnesota Univ.-Duluth. Dept. of Mechanical and Industrial Engineering.
Document Type Technical report
Title Note N/A
NTIS Issue Number 1225
Contract Number CTS 2009006

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