Determining Constructed Pavement Layer Thicknesses Using Nondestructive Testing

Coring is required for density determinations in flexible pavements and for pavement layer thickness determinations for both rigid and flexible pavements. Although this method accurately measures thickness, it is destructive, labor intensive, and time‐consuming. Coring pavements can introduce weak spots in the new pavement that may lead to maintenance issues later, even if the core hole is filled in accordance with accepted practices. Moreover, cores are usually taken only at random locations and may be inadequate to estimate the thickness profile of an entire pavement section. Extracting more cores to adequately determine the thickness profile would unduly damage the pavement, excessively increasing labor costs and time. New technologies permit rapid determination of pavement layer thicknesses without obtaining core samples. The objectives of this research are to: 1) Evaluate nondestructive test methods that can accurately determine thickness without extracting core samples; 2) Examine the use nondestructive test methods to determine the in‐situ asphalt pavement layer density; and 3) If satisfactory nondestructive test methods are available and implementable, develop a Kentucky Test Method and describe the equipment and test method for inspectors.


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    • Status: Completed
    • Funding: $190000
    • Contract Numbers:

      SPR 17‐539

    • Sponsor Organizations:

      Kentucky Transportation Cabinet

      200 Mero Street
      Frankfort, KY  United States  40622
    • Managing Organizations:

      Kentucky Transportation Cabinet

      200 Mero Street
      Frankfort, KY  United States  40622
    • Performing Organizations:

      University of Kentucky, Lexington

      Kentucky Transportation Center
      College of Engineering, 176 Raymond Building
      Lexington, KY  United States  40506-0281
    • Principal Investigators:

      Rister, Brad

    • Start Date: 20160701
    • Expected Completion Date: 20190630
    • Actual Completion Date: 0
    • USDOT Program: Transportation, Planning, Research, and Development
    • Subprogram: pavement maintenance

    Subject/Index Terms

    Filing Info

    • Accession Number: 01675063
    • Record Type: Research project
    • Source Agency: University of Kentucky, Lexington
    • Contract Numbers: SPR 17‐539
    • Files: RiP, STATEDOT
    • Created Date: Jul 17 2018 1:54PM