STP1562

    Hydraulic Testing of Multi-Component Geosynthetic Clay Liners

    Published: Jul 2013


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    Abstract

    Multi-component geosynthetic clay liners (GCLs) are a new variation of GCLs or GBR-Cs (Geosynthethic Clay Barriers—CEN and ISO definition) and are fast growing in the current sealing applications. During the manufacturing process, the “classic” geosynthetic clay liners are combined with either an adhered film, coating, or membrane that can decrease the hydraulic conductivity of the product but can also add other features. ASTM D5887 [2009, “Standard Test Method for Measurement of Index Flux through Saturated Geosynthetic Clay Liner Specimens Using a Flexible Wall Permeameter,” Annual Book of ASTM Standards, ASTM International, West Conshohocken, PA] is the standard test method for hydraulic testing/testing the index flux through saturated geosynthetic clay liner specimens using a flexible wall permeameter. It gives guidance for testing procedures and apparatus but it is noted in the standard that it may not be applicable to GCL products with geomembrane backing(s). In this paper, results will be shown of the testing of the different multi-component geosynthetic clay liners using exactly the ASTM D5887 procedure. Further modifications will be discussed to allow testing according to this method and suggestions for a new method will be presented.

    Keywords:

    hydraulic testing, multi-component gcl, flexible wall permeameter, needle-punched, coating barrier


    Author Information:

    Ehrenberg, Henning
    NAUE GmbH & Co. KG, Espelkamp

    von Maubeuge, Kent P.
    NAUE GmbH & Co. KG, Espelkamp


    Paper ID: STP156220120101

    Committee/Subcommittee: D35.04

    DOI: 10.1520/STP156220120101


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