STP1308

    Measurement of Hydraulic Properties of Geosynthetic Clay Liners Using a Flow Box

    Published: Jan 1997


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    Abstract

    An important property of geosynthetic clay liners (GCLs) is hydraulic conductivity. The authors describe and evaluate a new device, a GCL flowbox, that offers several advantages over large tanks or flexible-wall permeameters. The GCL flowbox can be used to test large-scale intact specimens, overlapped specimens with a full-width seam, and specimens subjected to environmental stresses such as freeze-thaw. A transparent, acrylic GCL flowbox was developed for testing at low normal stresses, and a metal version was developed for applying higher normal stresses. Results from the GCL flowbox compared favorably to results obtained with tanks and flexible-wall permeameters. It is concluded that the GCL flowbox provides a convenient and reliable testing methodology for verifying the hydraulic conductivity of both intact specimens and overlapped GCL panels.

    Keywords:

    hydraulic conductivity, permeability, bentonite, geosynthetic clay liner, GCL, overlap, freeze, thaw


    Author Information:

    Daniel, DE
    Professor, University of Texas, Austin, TX

    Trautwein, SJ
    President, Trautwein Soil Testing Equipment Company, Houston, TX

    Goswami, PK
    Graduate Research Assistant, University of Texas, Austin, TX


    Paper ID: STP11803S

    Committee/Subcommittee: D35.04

    DOI: 10.1520/STP11803S


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