1、Designation:D6072/D6072M09(Reapproved 2015)Standard 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 o
2、f 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 practice covers procedures for sampling geosyn-thetic clay liners(GCLs)for the purpose of laboratory testing.These p
3、rocedures are designed 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,p
4、rior to shipment 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 co
5、vers only the methods 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 eq
6、uivalents;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 th
7、is 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:2D4220 Practices for Preserving and Transporting SoilSamplesD4354 Practice for Sampling of Geosynthetics and RolledErosio
8、n 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 layersof geosynthetics.3.1.2
9、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).3.1.4 For definitions of other geosynthetic t
10、erms 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 production facility)or exhume
11、d 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 sufficient for the prepar
12、ation of several representative testspecimens for the standardized physical,hydraulic,and me-chanical tests to be performed on the GCLs.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 Prio
13、r to Installation:1This practice is under the jurisdiction of ASTM Committee D35 on Geosyn-thetics and is the direct responsibility of Subcommittee D35.04 on GeosyntheticClay Liners.Current edition approved Jan.1,2015.Published February 2015.Originallyapproved in 1996.Last previous edition approved
14、in 2009 as D6072/D6072M09.DOI:10.1520/D6072_D6072M-09R15.2For 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
15、 ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959.United States1 5.1.1 In accordance with the project specifications or withPractice D4354,divide the shipment or other given quantity ofGCL into lots,and select lot and laboratory samples.This willusually involve th
16、e selection of a certain number of finishedGCL rolls from which samples will be cut.5.1.2 Affix on the packaging of the GCL rolls to be sampledadhesive labels or other markings which clearly identify thatthe roll is to be sampled.5.1.3 Record the label information from each roll to besampled for future incorporation into within the qualityassurance/quality control(QA/QC)documentation for theGCL.5.1.4 Segregate the rolls identified for sampling.Refer toGuide D5888 for the proper equipment and tec
