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Significance and Use
Clay mineral is the functional component of GCL that reduces the hydraulic conductivity of industrial waste or ground water through the liner.
Clay mineral quality can vary significantly and effect the hydraulic conductivity of the GCL composite. This test method evaluates a significant property of clay mineral that relates to performance.
1.1 This test method covers an index method that enables the evaluation of fluid loss properties of a clay mineral film deposited on a filter paper from a 6 % solids slurry of clay mineral at 100-psi (-kPa) pressure as a measure of its usefulness for permeability or hydraulic conductivity reduction in geosynthetic clay liners (GCL).
1.2 This test method is adapted from American Petroleum Institute drilling fluid specifications for bentonite.
1.3 Powdered clay mineral is tested as produced; granular clay mineral should be ground to 100 % passing a 100 mesh U.S. Standard Sieve with a minimum of 65 % passing a 200 mesh U.S. Standard Sieve with the whole ground product used for testing.
1.4 The values stated in SI units are to be regarded as the standard. The values given in parentheses are for information only.
1.5 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.
2. Referenced Documents (purchase separately) The documents listed below are referenced within the subject standard but are not provided as part of the standard.
D1193 Specification for Reagent Water
E1 Specification for ASTM Liquid-in-Glass Thermometers
E691 Practice for Conducting an Interlaboratory Study to Determine the Precision of a Test Method
E725 Test Method for Sampling Granular Carriers and Granular Pesticides
API StandardsAPIRP131, Recommended Practice for Laboratory Testing of Drilling Fluids Available from American Petroleum Institute (API), 1220 L. St., NW, Washington, DC 20005-4070, http://www.api.org.
ICS Number Code 59.080.70 (Geotextiles)
UNSPSC Code 30121702(Geotextile)
ASTM D5891-02(2009), Standard Test Method for Fluid Loss of Clay Component of Geosynthetic Clay Liners, ASTM International, West Conshohocken, PA, 2009, www.astm.orgBack to Top