STP1076: Structural Study of Porometry and Filtration Opening Size of Geotextiles

    Faure, YH
    IRIGM, University Joseph Fourier, Grenoble,

    Gourc, JP
    IRIGM, University Joseph Fourier, Grenoble,

    Gendrin, P
    IRIGM, University Joseph Fourier, Grenoble,

    Pages: 18    Published: Jan 1990


    Abstract

    The use of geotextiles as filters involves the prior determination of filter criteria. The filtration opening size, Of, is used as characteristic geotextile parameter for the retention criterion. Until now, Of has been determined by an experimental procedure. In this paper, the authors propose a theoretical approach, based on a structural model applied to nonwoven geotextiles. The geotextile is modelled on the basis of the Poissonian polyhedra method, and the distribution of “conduits” passing through the geotextile is defined and evaluated. Once the textile structure has been modelled, particular attention is given to the hydrodynamic sieving test, which provides a means of measuring Of. A theoretical approach is used to simulate cyclic test conditions and to propose a parametric study for optimizing test conditions. This theoretical approach is systematically supported by an experimental validation. The proposed method is the first of its kind to provide a realistic means of forecasting the filtration opening size of nonwoven geotextiles.

    Keywords:

    nonwoven geotextiles, porometry, filtration opening size, Poissonian polyhedra, filter criterion, retention criterion


    Paper ID: STP23500S

    Committee/Subcommittee: D35.03

    DOI: 10.1520/STP23500S


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