STP1198

    Radar for Pavement Thickness Evaluation

    Published: Jan 1994


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    Abstract

    Pavement layer thickness data required for network and project level pavement management is often not available due to the cost, time, and traffic disruption involved in taking cores. A non-destructive, non-contact method for thickness measurement is available and can be implemented from a survey vehicle moving at highway speed. The technology incorporates horn antenna radar equipment coupled with customized processing software. The reported work represents evaluations of the method on 46 different pavement sections located in 12 different states. The processed radar data has been correlated with results from over 300 cores, showing an expected accuracy of +/-7.5% (typically +/- 0.5 inches or 12.7 mm) for asphalt thickness. Results from borings and test pits show an expected accuracy of +/- 12% (+/- 1 inch or 25.4 mm) for base thickness. The radar data has also been successfully utilized to identify changes in pavement section.

    Keywords:

    Pavement thickness, radar, ground penetrating radar, pavement management, nondestructive testing, pavement evaluation


    Author Information:

    Maser, KR
    President, INFRASENSE, Inc., Cambridge, MA

    Scullion, T
    Research Engineer, Texas Transportation Institute, Texas A&M University, College Station, TX

    Roddis, WMK
    Assistant Professor, University of Kansas, Lawrence, KS

    Fernando, E
    Assistant Research Engineer, Texas Transportation Institute, Texas A&M University, College Station, TX


    Paper ID: STP18158S

    Committee/Subcommittee: D04.39

    DOI: 10.1520/STP18158S


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