Volume 31, Issue 3 (May 2008)

    Modified Fluid Loss Test as an Improved Measure of Hydraulic Conductivity for Bentonite

    (Received 12 October 2005; accepted 14 November 2007)

    Published Online: 2008

    CODEN: GTJOAD

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    Abstract

    The Modified Fluid Loss test (MFL) was developed to measure hydraulic conductivity using the filter press method. Based upon modification of conventional filtration models, the average hydraulic conductivity of a bentonite filter cake can be obtained from the filtrate-time relationship and the water content of the filter cake. At higher effective stresses (>100 kPa), the hydraulic conductivity from MFL method showed higher values than those from flexible wall permeameter (FWP) method. In comparison to the FWP method, the MFL method-based hydraulic conductivities are on the conservative side for the stress range associated with typical bottom liners in solid waste landfills. The MFL test was found to be a convenient test method to assess the hydraulic conductivity of bentonite, especially at low effective stresses. The MFL test can be used to obtain the hydraulic conductivity of bentonite within about a day instead of several days to weeks required for the FWP test.


    Author Information:

    Chung, Jinhyung
    Geotechnical Engineer, Paulus, Sokolowski & Sartor, LLC, Warren

    Daniel, David E
    President, University of Texas at Dallas, Richardson


    Stock #: GTJ100005

    ISSN: 0149-6115

    DOI: 10.1520/GTJ100005

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    Author
    Title Modified Fluid Loss Test as an Improved Measure of Hydraulic Conductivity for Bentonite
    Symposium , 0000-00-00
    Committee D35