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    Volume 7, Issue 2 (October 2018)

    Special Issue Paper

    Shear-Property-Based Design Approach of Asphalt Mixture in Long and Steep Sections—Taking Togo No. 1 Highway as a Case

    (Received 5 March 2017; accepted 18 September 2017)

    Published Online: 2018

    CODEN: ACEMF9

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    Abstract

    The asphalt pavement in long and steep slope sections is more prone to serious rutting distress than that in common slope sections. Therefore, it should be designed with more consideration of anti-rutting property. Since anti-rutting property of hot-mixed asphalt mixture (HMA) is closely related to its shear property, the objective of this study was, relying on the No. 1 Highway reconstructive project in Togo, to propose a design approach to asphalt mixture in long and steep slope sections based on shear property. In this article, a rutting prediction model developed by Tongji University was used to quantify the critical shear strength of asphalt mixture. First, this model was calibrated using field survey data of the existing road, making the model suitable for the Togo No. 1 Highway reconstructive project. Then, the critical shear strength of asphalt mixture was given according to the allowable rutting depth and the calibrated model. Last, four asphalt mixtures with different gradations of AC13-1, AC13-2, Sup13-1, and Sup13-2 were designed using local raw materials, the shear property of which was determined with the uniaxial penetration test (UPT) and the Wheel Track Test. Finally, Sup13-2 was chosen as the optimum gradation for the No.1 Highway reconstructive project with respect to shear property, and its other engineering properties were determined. The concluded design procedure of shear-property-based design approach was given at the end of this article.

    Author Information:

    Wu, Bangwei
    Key Laboratory of Road and Traffic Engineering of the Ministry of Education, Tongji Univ., Shanghai,

    Li, Xiuxin
    China Road and Bridge Corporation, Beijing,

    Liu, Liping
    Key Laboratory of Road and Traffic Engineering of the Ministry of Education, Tongji Univ., Shanghai,

    Sun, Lijun
    Key Laboratory of Road and Traffic Engineering of the Ministry of Education, Tongji Univ., Shanghai,


    Stock #: ACEM20170014

    ISSN:2379-1357

    DOI: 10.1520/ACEM20170014

    Author
    Title Shear-Property-Based Design Approach of Asphalt Mixture in Long and Steep Sections—Taking Togo No. 1 Highway as a Case
    Symposium ,
    Committee D04