1、Designation:D6072/D6072M19Standard Practice forObtaining Samples of Geosynthetic Clay Liners1This standard is issued under the fixed designation D6072/D6072M;the number immediately following the designation indicates theyear of original adoption or,in the case of revision,the year of last revision.A
2、 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 practice covers procedures for sampling geosyn-thetic clay liners(GCLs)for the purpose of laboratory testing.These procedures are des
3、igned to ensure that representativesamples are obtained and properly packaged for submittal to atesting laboratory.1.2 The procedures in this practice may be applied to eithersamples of unhydrated GCLs obtained at the project site priorto installation(or at the production facility,prior to shipment
4、tothe project site)or samples exhumed from a project site afterinstallation.1.3 It is assumed that the number of samples to be obtainedhas already been determined in the project specification,standard test method,or by prior agreement between thepurchaser and seller.This practice covers only the met
5、hods forobtaining a pre-arranged number of samples and does notdescribe methods for obtaining individual specimens from thesample.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;therefo
6、re,eachsystem shall be used independently of the other.Combiningvalues from the two systems may result in nonconformancewith 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 est
7、ablish appro-priate safety,health,and environmental practices and deter-mine the applicability of regulatory limitations prior to use.1.6 This international standard was developed in accor-dance with internationally recognized principles on standard-ization established in the Decision on Principles
8、for theDevelopment of International Standards,Guides and Recom-mendations issued by the World Trade Organization TechnicalBarriers to Trade(TBT)Committee.2.Referenced Documents2.1 ASTM Standards:2D4220/D4220M Practices for Preserving and TransportingSoil SamplesD4354 Practice for Sampling of Geosynt
9、hetics and RolledErosion Control Products(RECPs)for TestingD4439 Terminology for GeosyntheticsD5888 Guide for Storage and Handling of GeosyntheticClay Liners3.Terminology3.1 Definitions:3.1.1 geosynthetic clay liner(GCL),na manufacturedhydraulic barrier consisting of clay bonded to a layer or layers
10、of geosynthetics.3.1.2 sample,na portion of a material which is taken fortesting or for record purposes(see Practice D4354).3.1.3 specimen,na specific portion of a material orlaboratory sample upon which a test is performed or which istaken for that purpose(see Practice D4354).3.2 For definitions of
11、 other geosynthetic terms used in thispractice,refer to Terminology D4439.4.Significance and Use4.1 This practice provides a procedure by which samples ofGCL should be obtained for laboratory testing.The practiceapplies to materials obtained prior to installation(either at a jobsite or at a producti
12、on facility)or exhumed material afterinstallation.4.2 Only GCL samples obtained in accordance with 5.1 ofthis practice will be considered representative of the actualmanufactured GCL for quality assurance/quality control(QA/QC)purposes.4.3 The quantity of GCL received by the laboratory shouldbe suff
13、icient for the preparation of several representative testspecimens for the standardized physical,hydraulic,and me-chanical tests to be performed on the GCLs.1This practice is under the jurisdiction of ASTM Committee D35 on Geosyn-thetics and is the direct responsibility of Subcommittee D35.04 on Geo
14、syntheticClay Liners.Current edition approved Jan.1,2019.Published January 2019.Originallyapproved in 1996.Last previous edition approved in 2018 as D6072/D6072M 18.DOI:10.1520/D6072_D6072M-19.2For referenced ASTM standards,visit the ASTM website,www.astm.org,orcontact ASTM Customer Service at servi
15、ceastm.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 StatesThis international standard was developed in accordance with inte
16、rnationally recognized principles on standardization established in the Decision on Principles for theDevelopment of International Standards,Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade(TBT)Committee.1 4.4 The procedures in this practice should be used by plantand field personnel for obtaining GCL samples for laboratorytesting.5.Procedure5.1 Obtaining Samples Prior to Installation:5.1.1 In accordance with the project specifications or withPractice
