STP886

    Methods for Testing the Compatibility of Clay Liners with Landfill Leachate

    Published: Jan 1985


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    Abstract

    The compatibility of compacted clay liners with landfill leachate may be evaluated with laboratory permeability tests. Compaction mold permeameters are recommended for laboratory-compacted specimens of clay subjected to low overburden pressure. Flexible wall permeameters are recommended for laboratory-compacted specimens subjected to relatively high overburden pressure and for undisturbed specimens of clay obtained from the field. Before permeability tests are performed, the index properties of the soil should be determined by mixing the soil with water and by mixing the soil with the leachate. If the leachate does not affect the index properties of the soil, it is not likely to affect the permeability. The solubility of the soil in the leachate should be checked if the soil is acidic or basic. Also, for dilute leachates, batch equilibrium tests are recommended before a permeability test is initiated so that the tendency for the soil to adsorb materials in the leachate can be evaluated. The effluent liquid should be monitored to determine the degree of breakthrough of key constituents. It is best to continue the permeability test until full breakthrough is achieved.

    Keywords:

    permeability, hydraulic conductivity, soil, clay linear, compatibility, leachate, hazardous waste, adsorption, index test, chemicals


    Author Information:

    Bowders, JJ
    Graduate research assistants (Bowders and Broderick) and assistant professors (Daniel and Liljestrand), University of Texas, Austin, TX

    Daniel, DE
    Graduate research assistants (Bowders and Broderick) and assistant professors (Daniel and Liljestrand), University of Texas, Austin, TX

    Broderick, GP
    Graduate research assistants (Bowders and Broderick) and assistant professors (Daniel and Liljestrand), University of Texas, Austin, TX

    Liljestrand, HM
    Graduate research assistants (Bowders and Broderick) and assistant professors (Daniel and Liljestrand), University of Texas, Austin, TX


    Paper ID: STP36375S

    Committee/Subcommittee: D34.01

    DOI: 10.1520/STP36375S


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