Designation:D6693/D6693M−04(Reapproved2015)´1StandardTestMethodforDeterminingTensilePropertiesofNonreinforcedPolyethyleneandNonreinforcedFlexiblePolypropyleneGeomembranes1ThisstandardisissuedunderthefixeddesignationD6693/D6693M;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.ε1NOTE—DesignationwaschangedtodualandunitsinformationwascorrectededitoriallyinJune2015.1.Scope1.1Thistestmethodcoversthedeterminationofthetensilepropertiesofnonreinforcedgeomembranesintheformofstandarddumbbell-shapedtestspecimenswhentestedunderdefinedconditionsofpretreatment,temperature,andmachinespeed.1.2Thistestmethodcanbeusedfortestingmaterialsthicknessbetween0.25mm[0.010in.]and6.3mm[0.25in.].NOTE1—Thistestmethodisnotintendedtocoverprecisephysicalprocedures.Theconstantrateofcrossheadmovementofthistestlacksaccuracyfromatheoreticalstandpoint.Awidedifferencemayexistbetweentherateofcrossheadmovementandtherateofstrainofthespecimenindicatingthatthetestingspeedsspecifiedmaydisguiseimportanteffectsorcharacteristicsofthesematerialsintheplasticstate.Further,itisrealizedthatvariationsinthethicknessesoftestspecimens,aspermittedbythistestmethod,producevariationsinthesurface-volumeratiosofsuchspecimens,andthatthesevariationsmayinfluencethetestresults.Hence,wheredirectlycomparableresultsaredesired,allsamplesshouldbeofequalthickness.Specialadditionaltestsshouldbeusedwheremoreprecisephysicaldataareneeded.1.3Testdataobtainedbythistestmethodarerelevantandmaybeappropriateforuseinengineeringdesignwithconsid-erationoftestconditionsascomparedwithin-servicecondi-tions.1.4ThevaluesstatedineitherSIunitsorinch-poundunitsaretoberegardedseparatelyasstandard.Thevaluesstatedineachsystemmaynotbeexactequivalents;therefore,eachsystemshallbeusedindependentlyoftheother.Combiningvaluesfromthetwosystemsmayresultinnon...
