Organic Montmorillonite Modified Asphalt Materials: Preparation and Characterization

    Volume 42, Issue 1 (January 2014)

    ISSN: 0090-3973

    CODEN: JTEOAD

    Published Online: 17 October 2013

    Page Count: 9


    Pei, Jianzhong
    Professor, Key Laboratory for Special Area Highway Engineering of Ministry of Education, Chang'an Univ., Xi'an, Shaanxi

    Wen, Yong
    Research Assistant, Dept. of Civil and Environmental Engineering, The Hong Kong Polytechnic Univ., Hong Kong,

    Li, Yanwei
    General Engineer, Transportation Bureau of Shijiazhuang, Shijiazhuang, Hebei

    Zhang, Zengping
    Assistant Professor, Key Laboratory for Special Area Highway Engineering of Ministry of Education, Chang'an Univ., Xi'an, Shaanxi

    Shi, Xin
    General Engineer, Transportation Bureau of Shijiazhuang, Shijiazhuang, Hebei

    Zhang, Jiupeng
    Assistant Professor, Key Laboratory for Special Area Highway Engineering of Ministry of Education, Chang'an Univ., Xi'an, Shaanxi

    Li, Rui
    Key Laboratory for Special Area Highway Engineering of Ministry of Education, Chang'an Univ., Xi'an, Shaanxi

    Cao, Leilei
    Key Laboratory for Rd. Construction Technology & Equipment of Ministry of Education, Chang'an Univ., Xi'an, Shaanxi

    Du, Qunle
    General Engineer, Highway Administration Bureau of Hebei Province, Shijiazhuang, Hebei

    (Received 15 June 2012; accepted 16 May 2013)

    Abstract

    Organic montmorillonite (OMMT) modified asphalt was prepared with the melting intercalation technology. The distribution of OMMT layers in matrix asphalt was characterized through x-ray diffraction (XRD) and transmission electron microscope (TEM), and the effect of OMMT on physical properties and dynamic rheology of matrix asphalt were studied as well. It was found that OMMT homogeneously dispersed in the modified asphalt and intercalated OMMT/asphalt nanocomposites were prepared by means of melt extrusion. Additionally, from the penetration, softening point, and dynamic shear rheometer (DSR) testing result, it was observed that the OMMT obviously improved the high-temperature stability, temperature serviceability, and rut resistance of the matrix asphalt. The bending beam rheometer (BBR) results indicated that the OMMT modified asphalt with OMMT dosage of 3 % exhibited the lowest stiffness and highest resistance to low temperature cracking, and had less effect on the relaxation of stress in low temperature in comparison with OMMT modified asphalt with OMMT dosage of 1 % and 5 %. Furthermore, it was found that the optimal dosage of OMMT was 3 %.


    Paper ID: JTE20120205

    DOI: 10.1520/JTE20120205

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    Author
    Title Organic Montmorillonite Modified Asphalt Materials: Preparation and Characterization
    Symposium , 0000-00-00
    Committee D04