Evaluation of Asphalt Pavement Analyzer as a Tool to Predict Rutting

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  • 8/9/2019 Evaluation of Asphalt Pavement Analyzer as a Tool to Predict Rutting

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    Cooley, L.A. Jr. and P.S. Kandhal. Evaluation of Asphalt Pavement Analyzer as

    a Tool to Predict Rutting. Proceedings, Ninth International Conference on

    Asphalt Pavements, International Society for Asphalt Pavements, Copenhagen,

    Denmark, August 17-22, 2002.

    ABSTRACT

    A standard laboratory test to predict the rutting potential of an HMA (hot mix asphalt)

    that is accelerated, relatively inexpensive, and able to be used during quality

    control/quality assurance testing would be of great benefit. Currently the most

    common type of standardized laboratory test of this nature is a loaded wheel tester

    (LWT). The purpose of this study is to evaluate the Asphalt Pavement Analyzer

    (APA), the most common LWT in the U.S., to determine its suitability as a general

    method of predicting the rut potential of HMA mixes. Ten HMA mixtures of knownfield performance were used in a full factorial experiment. The combination of testing

    parameters which provided APA rut depths closest to and highly correlated with the

    actual field rut depths, were recommended to fine tune the APA testing protocol.