Volume 22, Issue 4 (December 1999)

    Hydraulic Conductivity Testing of Geosynthetic Clay Liners (GCLs) Using the Constant Volume Method

    (Received 12 August 1998; accepted 2 June 1999)

    CODEN: GTJOAD

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    Abstract

    Hydraulic conductivity tests were conducted using open and constant-volume permeation systems on specimens from a geosynthetic clay liner (GCL). Two constant volume (CV) systems were employed: the falling-head constant-volume (FHCV) system and the constant-head constant-volume (CHCV) system. A conventional burette system using pressurized air was employed for the open system (OS) tests. The test results show that hydraulic conductivity tests can be conducted 30 or more times faster with the FHCV and CHCV systems than with an open system. Typically the permeation portion of the FHCV and CHCV tests can be conducted in one-half day. Slightly lower hydraulic conductivities are measured with the CV systems due to the slightly higher effective stress applied during testing with these systems. The CHCV system has several advantages over the FHCV system, including minimizing initial transient behavior, constant applied effective stress during testing, and simpler calculations.


    Author Information:

    Wang, XD
    Geotechnical Laboratory Manager, University of Wisconsin-Madison, Madison, WI

    Benson, CH
    Associate Professor, University of Wisconsin-Madison, Madison, WI


    Stock #: GTJ11239J

    ISSN: 0149-6115

    DOI: 10.1520/GTJ11239J

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    Author
    Title Hydraulic Conductivity Testing of Geosynthetic Clay Liners (GCLs) Using the Constant Volume Method
    Symposium , 0000-00-00
    Committee D18