1、Designation:D676612Standard Test Method forEvaluation of Hydraulic Properties of Geosynthetic ClayLiners Permeated with Potentially Incompatible AqueousSolutions1This standard is issued under the fixed designation D6766;the number immediately following the designation indicates the year oforiginal a
2、doption or,in the case of revision,the year of last revision.A number in parentheses indicates the year of last reapproval.Asuperscript epsilon()indicates an editorial change since the last revision or reapproval.1.Scope1.1 This test method covers laboratory measurement of bothflux and hydraulic con
3、ductivity(also referred to as coeffcientof permeability)of geosynthetic clay liner(GCL)specimenspermeated with chemical solutions and leachates utilizing aflexible wall permeameter.For test measurement of indexhydraulic properties of geosynthetic clay liners,refer to TestMethod D5887.1.2 This test m
4、ethod may be utilized with GCL specimensthat have a hydraulic conductivity less than or equal to 1 10-5m/s(1 10-3cm/s).1.3 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
5、backing(s).1.4 This test method provides measurements of flux andhydraulic conductivity under a prescribed set of conditions,asan index test,that can be used for manufacturing qualitycontrol.The flux and hydraulic conductivity values determinedusing this test method under the prescribed set of condi
6、tions isnot considered to be representative of the in-service conditionsof GCLs.However,the test method allows the requester toestablish a set of test conditions;thus,the test method also maybe used to check performance or conformance,or both.1.5 The values stated in SI units are to be regarded as t
7、hestandard,unless other units are specifically given.By traditionin U.S.practice,hydraulic conductivity is reported in centime-ters per second,although the common SI units for hydraulicconductivity are meters per second.1.6 This standard does not purport to address all of thesafety concerns,if any,a
8、ssociated 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 ContainedFlui
9、dsD2216 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 TestingD5887 Test Method for Measure
10、ment of Index Flux ThroughSaturated Geosynthetic Clay Liner Specimens Using aFlexible Wall PermeameterE145 Specification for Gravity-Convection and Forced-Ventilation Ovens3.Terminology3.1 Definitions:3.1.1 flux,nthe rate of discharge of liquid under laminarflow conditions through a unit cross-secti
11、onal area of a GCLspecimen at a standard temperature condition(22 6 3C).3.1.2 geosyntheticclayliner(GCL),nafactory-manufactured geosynthetic hydraulic barrier consisting of claysupported by geotextiles,geomembranes,or a combinationthereof,that are held together by needling,stitching,chemicaladhesive
12、s or other methods.3.1.3 hydraulic conductivity,k,nthe rate of discharge ofliquid under laminar flow conditions through a unit cross-sectional area of a GCL specimen under a unit hydraulicgradient and standard temperature conditions(22 6 3C).3.1.3.1 DiscussionThe term coeffcient of permeability isof
13、ten used instead of hydraulic conductivity but hydraulicconductivity is used exclusively in this test method.A more1This 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 ap
14、proved July 1,2012.Published September 2012.Originallyapproved in 2002.Last previous edition approved in 2009 as D676609.DOI:10.1520/D6766-12.2For referenced ASTM standards,visit the ASTM website,www.astm.org,orcontact ASTM Customer Service at serviceastm.org.For Annual Book of ASTMStandards volume
15、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 complete discussion of the terminology associated with Dar-cys law is given in the literature.33.1.4 index test,na
16、 test procedure that may contain bias,but may be used to establish comparable results with respect tothe property of interest.3.1.5 pore volume of flow,nthe cumulative quantity offlow into a test specimen divided by the volume of voids in thespecimen.3.2 For definitions of other terms used in this test method,see Terminology D653 and D4439.4.Significance and Use4.1 This test method applies to one-dimensional,laminarflow of water or other aqueous solutions,such as chemicalsolutions,landfill leach
