Proposed Protocol for Characterizing a Clay Layer Subjected to Bending

    Volume 32, Issue 3 (May 2009)

    ISSN: 0149-6115

    CODEN: GTJOAD

    Published Online: 30 January 2009

    Page Count: 7


    Camp, S.
    LTHE, UMR 5564, UJF, Grenoble cedex 9,

    Plé, O.
    3S-R, UMR 5521, UJF/INPG, Grenoble cedex 9,

    Gourc, J. P.
    LTHE, UMR 5564, UJF, Grenoble cedex 9,

    (Received 21 September 2007; accepted 1 January 2009)

    Abstract

    Solid waste landfills have a cover barrier including a compacted clay liner which is the major element of the safety of the site. However, this barrier encounters many problems, in particular those related to its implementation and to the mechanical loading, such as potential differential settlements within the waste, after closing the cell. This phenomenon can induce bending strains in the clay layer and so create damage. The originality of this work is that the study includes the comparison of results from different types of standard tests, inducing compressive and tensile stresses. Compression tests, under low confinement, have been performed in the laboratory to characterize the clay behavior and to compare results with four-point bending tests. Particular attention is paid to experimental results by focusing the analysis on failure initiation. For the bending test, the limit value of the extension strain of the clay layer without damage is characterized. To optimize the landfill cap cover, particularly in terms of deformability, an improvement of the mechanical clay layer capability is proposed by addition of fiber reinforcement.


    Paper ID: GTJ101438

    DOI: 10.1520/GTJ101438

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    Author
    Title Proposed Protocol for Characterizing a Clay Layer Subjected to Bending
    Symposium , 0000-00-00
    Committee D18