Volume 36, Issue 1 (January 2008)

    Characterization of Louisiana Asphalt Mixtures Using Simple Performance Tests

    (Received 23 May 2007; accepted 14 August 2007)

    Published Online: 2007

    CODEN: JTEOAD

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    Abstract

    The main objective of this study was to characterize the performance of HMA mixes based on four laboratory tests, including three simple performance tests (SPTs) dynamic modulus ∣E∣, flow time (Ft), flow number (FN), and a Loaded Wheel Tracking (LWT) test. In addition, two dynamic modulus prediction models, namely Witczak and Hirsch, were evaluated. Thirteen plant-produced HMA mixtures were selected in this study. Laboratory characterization tests included the dynamic modulus ∣E∣, flow number (FN), and Hamburg-Type LWT tests. Test results indicated that the ∣E∣ test was sensitive to the nominal maximum aggregate size (NMAS) in the HMA mixture. Larger aggregates combined with recycled asphalt (RAP) tended to have high ∣E∣ values at high temperatures. Both the Witczak and Hirsch models could predict the dynamic modulus ∣E∣ values with a reasonable reliability. However, the Witczak model reliability increases for higher NMAS. On the other hand, the Hirsch model reliability increases for lower NMAS. The general ranking of the SPTs and LWT test was similar. In addition, this ranking was consistent with the field use of those mixtures in terms of their design traffic volume.


    Author Information:

    Mohammad, Louay N.
    Professor, Department of Civil and Environmental Engineering and Louisiana Transportation Research Center, Louisiana State University, Baton Rouge, LA

    Saadeh, Shadi
    Assistant Professor, Department of Civil Engineering & Construction Engineering Management, California State University, Long Beach, CA

    Obulareddy, Sandeep
    Graduate Research Assistant and Senior Asphalt Research Engineer, Louisiana Transportation Research Center, Baton Rouge, LA

    Cooper, Sam
    Graduate Research Assistant and Senior Asphalt Research Engineer, Louisiana Transportation Research Center, Baton Rouge, LA


    Stock #: JTE101245

    ISSN: 0090-3973

    DOI: 10.1520/JTE101245

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    Author
    Title Characterization of Louisiana Asphalt Mixtures Using Simple Performance Tests
    Symposium , 0000-00-00
    Committee D04