1、Designation:D639212(Reapproved 2018)Standard Test Method forDetermining the Integrity of Nonreinforced GeomembraneSeams Produced Using Thermo-Fusion Methods1This standard is issued under the fixed designation D6392;the number immediately following the designation indicates the year oforiginal adopti
2、on 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 describes destructive quality controland quality assurance tests
3、 used to determine the integrity ofgeomembrane seams produced by thermo-fusion methods.This test method presents the procedures used for determiningthe quality of nonbituminous bonded seams subjected to bothpeel and shear tests.These test procedures are intended fornonreinforced geomembranes only.1.
4、2 The types of thermal field seaming techniques used toconstruct geomembrane seams include the following:1.2.1 Hot AirThis technique introduces high-temperatureair or gas between two geomembrane surfaces to facilitatemelting.Pressure is applied to the top or bottom geomembrane,forcing together the t
5、wo surfaces to form a continuous bond.1.2.2 Hot Wedge(or Knife)This technique melts the twogeomembrane surfaces to be seamed by running a hot metalwedge between them.Pressure is applied to the top or bottomgeomembrane,or both,to form a continuous bond.Someseams of this kind are made with dual bond t
6、racks separated bya nonbonded gap.These seams are sometimes referred to asdual hot wedge seams or double-track seams.1.2.3 ExtrusionThis technique encompasses extrudingmolten resin between two geomembranes or at the edge of twooverlapped geomembranes to effect a continuous bond.1.3 The types of mate
7、rials covered by this test methodinclude the following:1.3.1 Very low-density polyethylene(VLDPE).1.3.2 Linear low-density polyethylene(LLDPE).1.3.3 Very flexible polyethylene(VFPE).1.3.4 Linear medium-density polyethylene(LMDPE).1.3.5 High-density polyethylene(HDPE).1.3.6 Polyvinyl chloride(PVC).1.
8、3.7 Flexible polypropylene(fPP).NOTE1The polyethylene identifiers presented in 1.3.1 1.3.5describe the types of materials typically tested using this test method.These are industry-accepted trade descriptions and are not technicalmaterial classifications based upon material density.1.4 This standard
9、 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,health,and environmental practices and deter-mine the applicability of regulatory limitations prior to use.1.5 This internationa
10、l standard was developed in accor-dance with internationally recognized principles on standard-ization established in the Decision on Principles for theDevelopment of International Standards,Guides and Recom-mendations issued by the World Trade Organization TechnicalBarriers to Trade(TBT)Committee.2
11、.Referenced Documents2.1 ASTM Standards:2D638 Test Method for Tensile Properties of PlasticsD4439 Terminology for GeosyntheticsD5199 Test Method for Measuring the Nominal Thicknessof GeosyntheticsD5994/D5994M Test Method for Measuring Core Thicknessof Textured Geomembranes2.2 EPA Standard:3EPA/600/2
12、-88/052 Lining of Waste Containment and OtherContainment Facilities,Appendix NLocus of BreakCodes for Various Types of FML Seams3.Terminology3.1 Definitions of Terms Specific to This Standard:3.1.1 geomembrane,nessentially impermeable geosyn-thetic composed of one or more synthetic sheets.3.1.2 qual
13、ity assurance,nall planned and systematic ac-tions necessary to provide adequate confidence that an item ora facility will perform satisfactorily in service.3.1.3 quality control,nthe operational techniques and theactivities which sustain a quality of material,product,system,1This test method is und
14、er the jurisdiction of ASTM Committee D35 onGeosynthetics and is the direct responsibility of Subcommittee D35.10 on Geomem-branes.Current edition approved Feb.1,2018.Published February 2018.Originallyapproved in 1999.Last previous edition approved in 2012 as D6392 12.DOI:10.1520/D6392-12R18.2For re
15、ferenced 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.3Available from the Superintendent of Documents,US Government PrintingOff
16、ice,Washington,DC 20402.Copyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959.United StatesThis international standard was developed in accordance with internationally 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 or service that will satisfy given needs;also the us
