STP1081

    Three Dimensional, Axi-Symmetric Geomembrane Tension Test

    Published: Jan 1990


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    Abstract

    Presented in this paper are details of a three dimensional, axi-symmetric, tension test used to determine the stress-vs-strain behavior of geomembranes. From this data the modulus, strength and elongation can be obtained. After evaluating the effect of load rate, the accuracy of the test was illustrated by a series of 10 tests on VLDPE geomembranes. This test series resulted in a standard deviation of approximately ± 10%. A variety of different HDPE geomembranes were evaluated with only nominal differences resulting from different manufacturing processes. Lastly, a variety of different geomembrane types were tested and compared to one another. All of these test results show a marked contrast to the usually performed one dimensional tension tests and result in substantially different behavioral trends.

    The test details and procedures are presented along with the theory that is required to convert the pressure-vs-deflection readings into stress-vs-strain values. The test is recommended for the type of out-of-plane loading conditions that occur at the bottom of reservoirs and landfills, and for liners used for covers over subsiding landfills and other compressible subgrade materials.

    Keywords:

    tension test, out-of-plane test, geomembranes, axi-symmetric test, performance test, hydrostatic pressure test, stress-vs-strain test


    Author Information:

    Koerner, RM
    Director, Senior Research Specialist and Graduate Research Assistant, Geosynthetic Research Institute, Drexel University, Philadelphia, PA

    Koerner, GR
    Director, Senior Research Specialist and Graduate Research Assistant, Geosynthetic Research Institute, Drexel University, Philadelphia, PA

    Hwu, B-L
    Director, Senior Research Specialist and Graduate Research Assistant, Geosynthetic Research Institute, Drexel University, Philadelphia, PA


    Paper ID: STP19031S

    Committee/Subcommittee: D35.10

    DOI: 10.1520/STP19031S


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