Nano-Mechanical Characterization of Mastic, Aggregate, and Interfacial Zone in Asphalt Composites

    Volume 41, Issue 6 (November 2013)

    ISSN: 0090-3973

    CODEN: JTEOAD

    Published Online: 28 August 2013

    Page Count: 9


    Khorasani, S.
    Mechanical Engineering, Texas A&M Univ., College Station, TX

    Masad, E.
    Mechanical Engineering, Texas A&M Univ. at Qatar, Education City,

    Texas A&M Transportation Institute, College Station, TX

    Civil Engineering, Texas A&M Univ., College Station, TX

    Kassem, E.
    Texas A&M Transportation Institute, College Station, TX

    Abu Al-Rub, R. K.
    Civil Engineering, Texas A&M Univ., College Station, TX

    (Received 22 May 2012; accepted 1 May 2013)

    Abstract

    This study used a nanoindentation technique to explore the local nanoscale mechanical properties of material phases and interfaces in an asphalt concrete composite. Regions of aggregate and mastic and their interfaces were nanoindented, and the load-displacement curves were analyzed to calculate the elastic modulus and hardness of the three phases. The interface region was found to have hardness and modulus values between those of the aggregate and the mastic. This study contributes significantly to the nanoscale characterization of asphalt concrete composites, as it provides unique measurements of mechanical properties of phases and especially the interface at a very small scale.


    Paper ID: JTE20120178

    DOI: 10.1520/JTE20120178

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    Author
    Title Nano-Mechanical Characterization of Mastic, Aggregate, and Interfacial Zone in Asphalt Composites
    Symposium , 0000-00-00
    Committee D04