An Empirical Approach to Filtration Criteria for Non-Woven Geotextiles

    Published: Jan 1996

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    Many filter design criteria have been produced by various researchers. However, none of these criteria have been universally accepted to be the standard design method. In order to develop a reliable design criteria, an empirical design method was produced. The methodology adopted for this study consisted of the filtration test (long-term gradient ratio test), the hydrodynamic sieving test, and the image analysis test. In the filtration test, eight different soil gradings were tested with six sizes of non-woven needled-punched geotextiles to determine the compatibility of each soil/geotextile combination system. From the hydrodynamic sieving test and the image analysis test, the opening size distribution (OSD) was determined, including the influencing factor of a geotextile's compressibility. As soil characteristics can be determined from standard soil tests and knowing the geotextile's characteristics (OSD) together with the soil/geotextile compatibility, an empirical design method could be developed.


    non-woven geotextiles, empirical design, filtration test, hydrodynamic sieving, image analysis, opening size distribution

    Author Information:

    Chin, YM
    Research Student, School of Civil Engineering, Curtin University of Technology, Perth,

    Nikraz, HR
    Lecturer, School of Civil Engineering, Curtin University of Technology, Perth,

    Committee/Subcommittee: D35.10

    DOI: 10.1520/STP15595S

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