ASTM_D_5887_-_D_5887M_-_16.pdf

Designation:D5887/D5887M16Standard Test Method forMeasurement of Index Flux Through Saturated GeosyntheticClay Liner Specimens Using a Flexible Wall Permeameter1This standard is issued under the fixed designation D5887/D5887M;the number immediately following the designation indicates theyear of original adoption or,in the case of revision,the year of last revision.A number in parentheses indicates the year of lastreapproval.A superscript epsilon()indicates an editorial change since the last revision or reapproval.1.Scope1.1 This test method covers an index test that coverslaboratory measurement of flux through saturated geosyntheticclay liner(GCL)specimens using a flexible wall permeameter.1.2 This test method is applicable to GCL products havinggeotextile backing(s).It is not applicable to GCL products withgeomembrane backing(s),geofilm backing(s)or polymer coat-ing backing(s).1.3 This test method provides a measurement of flux undera prescribed set of conditions that can be used for manufactur-ing quality control.The test method can also be used to checkconformance.The flux value determined using this test methodis not considered to be representative of the in-service flux ofGCLs.1.4 The values stated in either SI units or inch-pound unitsare to be regarded separately as standard.The values stated ineach system may not be exact equivalents;therefore,eachsystem shall be used independently of the other.Combiningvalues from the two systems may result in non-conformancewith the standard.1.5 This standard does not purport to address all of thesafety concerns,if any,associated with its use.It is theresponsibility of the user of this standard to establish appro-priate safety and health practices and determine the applica-bility of regulatory limitations prior to use.2.Referenced Documents2.1 ASTM Standards:2D653 Terminology Relating to Soil,Rock,and ContainedFluidsD2216 Test Methods for Laboratory Determination of Water(Moisture)Content of Soil and Rock by MassD4439 Terminology for GeosyntheticsD4753 Guide for Evaluating,Selecting,and Specifying Bal-ances and Standard Masses for Use in Soil,Rock,andConstruction Materials TestingE145 Specification for Gravity-Convection and Forced-Ventilation OvensE691 Practice for Conducting an Interlaboratory Study toDetermine the Precision of a Test Method3.Terminology3.1 Definitions:3.1.1 flux,nthe rate of discharge of water under laminarflow conditions through a unit cross-sectional area of a GCLspecimen.3.1.2 geosyntheticclayliner(GCL),nafactory-manufactured geosynthetic hydraulic barrier consisting of claysupported by geotextiles,or geomembranes,or both,that areheld together by needling,stitching,or chemical adhesives.3.1.3 index test,na test procedure that may contain a bias,but that may be used to establish an order for a set of specimenswith respect to the property of interest.3.1.4 For definitions of other terms used in this test method,see Terminology D653 and Terminology D4439.4.Summary of Test Method4.1 This test method involves permeation of a 100-mm4-in.diameter GCL test specimen.The specimen is set up ina flexible-wall permeameter,subjected to a total stress of550 kPa 80 psi and a backpressure of 515 kPa 75 psi for aperiod of 48 h.Flow is initiated using deionized water byraising the pressure on the influent side of the test specimen to530 kPa 77 psi.The flux is determined when inflow andoutflow are approximately equal(within 625%).5.Significance and Use5.1 This test method yields the flux of water through asaturated GCL specimen that is consolidated,hydrated,andpermeated under a prescribed set of conditions.5.2 This test method can be performed to determine if theflux of a GCL specimen exceeds the maximum value stated bythe manufacturer.1This test method is under the jurisdiction of ASTM Committee D35 onGeosynthetics and is the direct responsibility of Subcommittee D35.04 on Geosyn-thetic Clay Liners.Current edition approved Sept.1,2016.Published September 2016.Originallyapproved in 1995.Last previous edition approved in 2009 as D5887 09.DOI:10.1520/D5887_D5887M-16.2For referenced ASTM standards,visit the ASTM website,www.astm.org,orcontact ASTM Customer Service at serviceastm.org.For Annual Book of ASTMStandards volume information,refer to the standards Document Summary page onthe ASTM website.Copyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959.United States1 5.3 This test method can be used to determine the variationin flux within a sample of GCL by testing a number of differentspecimens.5.4 This test method does not provide a flux value to be useddirectly in design calculations.NOTE1Flux for in-service conditions depends on a number of factors,including confining pressure,type of hydration fluid,degree of hydration,degree of saturation,type of permeating fluid,and hydraulic gradient.Correlation between flux values obtained with this test method and fluxthrough GCLs subjected to in-service conditions has not been full