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    Volume 38, Issue 6 (November 2015)

    Laboratory Model Test on Contact Erosion of Dispersive Soil Beneath Pavement Layers

    (Received 20 August 2014; accepted 20 April 2015)

    Published Online: 26 November 2015

    CODEN: GTJODJ

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    Abstract

    Contact erosion failure beneath the pavement layer is frequently under-estimated. The risk of contact erosion failure is high at the interface of pavement embankment constructed on granular working platform material, particularly due to the higher constriction size than the embankment material. In addition, this type of failure occurs in the long-term process and it is furthermore difficult to identify, assess, and mitigate these failures initially. A new laboratory erosion test apparatus was developed in this research and its suitability for determining the risk of pavement deformation due to contact erosion failure as a result of vertical ground water fluctuations at the pavement embankment foundation was assessed. The suitability of this apparatus for the study of contact erosion failure below the pavement layer was examined by studying the erosion rate of dispersive clayey soil placed on the coarse aggregate layer. The soil layer was saturated in five different water cycles and water was allowed to draw down after saturation period for each cycle. The erosion test apparatus developed in this study was found to be suitable and reliable for determining the contact erosion failure under vertical ground water fluctuation beneath the pavement layer.


    Author Information:

    Jegatheesan, Piratheepan
    Lecturer, Swinburne Univ. of Technology, Melbourne,

    Sothilingam, Premkumar
    Ph.D. Student, Swinburne Univ. of Technology, Melbourne,

    Arulrajah, Arul
    Professor, Swinburne Univ. of Technology, Melbourne,

    Disfani, M. M.
    Lecturer, Swinburne Univ. of Technology, Melbourne,

    University of Melbourne, Melbourne,

    Rajeev, Pathmanathan
    Senior Lecturer, Swinburne Univ. of Technology, Melbourne,


    Stock #: GTJ20140179

    ISSN:0149-6115

    DOI: 10.1520/GTJ20140179

    Author
    Title Laboratory Model Test on Contact Erosion of Dispersive Soil Beneath Pavement Layers
    Symposium ,
    Committee D18