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    Field and Laboratory Evaluation of Superpave Level One Mix Design in California

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    This paper presents an evaluation of the volumetric (Level One) Superpave mix design procedure. The evaluation consisted of constructing field test sections in January 1996 and conducting various laboratory performance tests. The performance testing included repetitive simple shear test at constant height (RSST-CH), frequency sweep tests, repetitive direct tension test (RDTT), and Laboratoire Cenral des Ponts et Chaussées (LCPC) wheel track testing. This paper recognizes the importance of conducting performance tests to gain confidence in the volumetric mix design. It was concluded that all mixes placed on the project would be anticipated to perform adequately. Field performance has so far supported the laboratory findings. Further evaluation is recommended because this study addressed only one aggregate source, two gradations and two binder grades.


    Superpave, mix design, restricted zone, gradation, shear test, direct tension, gyratory

    Author Information:

    Shatnawi, SR
    Pavement Research Engineer, California Department of Transportation, Sacramento, CA

    Lancaster, F
    Materials Engineer, County of Los Angeles, Alhambra, CA

    Committee/Subcommittee: D04.42

    DOI: 10.1520/STP12080S