Designation:D6392−12(Reapproved2018)StandardTestMethodforDeterminingtheIntegrityofNonreinforcedGeomembraneSeamsProducedUsingThermo-FusionMethods1ThisstandardisissuedunderthefixeddesignationD6392;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.1.Scope1.1Thistestmethoddescribesdestructivequalitycontrolandqualityassurancetestsusedtodeterminetheintegrityofgeomembraneseamsproducedbythermo-fusionmethods.Thistestmethodpresentstheproceduresusedfordeterminingthequalityofnonbituminousbondedseamssubjectedtobothpeelandsheartests.Thesetestproceduresareintendedfornonreinforcedgeomembranesonly.1.2Thetypesofthermalfieldseamingtechniquesusedtoconstructgeomembraneseamsincludethefollowing:1.2.1HotAir—Thistechniqueintroduceshigh-temperatureairorgasbetweentwogeomembranesurfacestofacilitatemelting.Pressureisappliedtothetoporbottomgeomembrane,forcingtogetherthetwosurfacestoformacontinuousbond.1.2.2HotWedge(orKnife)—Thistechniquemeltsthetwogeomembranesurfacestobeseamedbyrunningahotmetalwedgebetweenthem.Pressureisappliedtothetoporbottomgeomembrane,orboth,toformacontinuousbond.Someseamsofthiskindaremadewithdualbondtracksseparatedbyanonbondedgap.Theseseamsaresometimesreferredtoasdualhotwedgeseamsordouble-trackseams.1.2.3Extrusion—Thistechniqueencompassesextrudingmoltenresinbetweentwogeomembranesorattheedgeoftwooverlappedgeomembranestoeffectacontinuousbond.1.3Thetypesofmaterialscoveredbythistestmethodincludethefollowing:1.3.1Verylow-densitypolyethylene(VLDPE).1.3.2Linearlow-densitypolyethylene(LLDPE).1.3.3Veryflexiblepolyethylene(VFPE).1.3.4Linearmedium-densitypolyethylene(LMDPE).1.3.5High-densitypolyethylene(HDPE).1.3.6Polyvinylchloride(PVC).1.3.7Flexiblepolypropylene(fPP).NOTE1—Thepolyethyleneidentifierspresentedin1.3.1–1.3.5describethetypesofmaterialstypicallytestedusingthiste...
