Evaluation of Density Gradients in Loaded Wheel Tester Samples

    Volume 28, Issue 6 (November 2000)

    ISSN: 0090-3973

    CODEN: JTEOAD

    Page Count: 12


    Cooley, LA
    Research engineer and associate director,, National Center for Asphalt Technology,, Auburn,, AL

    Kandhal, PS
    Research engineer and associate director,, National Center for Asphalt Technology,, Auburn,, AL

    (Received 17 December 1999; accepted 2 June 2000)

    Abstract

    The Asphalt Pavement Analyzer is a tool used to estimate the rutting potential of hot mix asphalt (HMA). This device is essentially the second generation of the Georgia Loaded Wheel Tester. It measures rutting potential by applying a moving wheel load to the surface of an HMA sample through a pressurized linear hose.

    This study was conducted to evaluate the density gradients in samples compacted with methods common to the Asphalt Pavement Analyzer. Both beams compacted with the Asphalt Vibratory Compactor (AVC) and cylinders compacted with the Superpave Gyratory Compactor were included. In order to realistically compare the two modes of compaction, cylindrical specimens compacted with the AVC were also included.

    Data accumulated from this study showed that the two compaction methods did produce different density gradients within samples. Vibratory compaction produced a density gradient where the highest density was at the top of the sample and subsequently the density was less toward the bottom of the sample. Gyratory compaction resulted in less density in the top and bottom of samples and more compaction in the middle of the sample.


    Paper ID: JTE12138J

    DOI: 10.1520/JTE12138J

    ASTM International is a member of CrossRef.

    Author
    Title Evaluation of Density Gradients in Loaded Wheel Tester Samples
    Symposium , 0000-00-00
    Committee D04