ASTM-D6878--11a

Designation:D6878/D6878M–11aStandardSpecificationforThermoplasticPolyolefinBasedSheetRoofing1ThisstandardisissuedunderthefixeddesignationD6878/D6878M;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.1.Scope1.1Thisspecificationcoversflexiblesheetmadefromthermoplasticpolyolefin(TPO)astheprincipalpolymer,intendedforuseinsingle-plyroofingmembranesexposedtotheweather.Thesheetshallcontainreinforcingfabricsorscrims.1.2Thetestsandpropertylimitsusedtocharacterizethesheetarevaluesintendedtoensureminimumqualityfortheintendedpurpose.In-placeroofsystemdesigncriteria,suchasfireresistance,fieldseamingstrength,materialcompatibility,andupliftresistance,amongothers,arefactorswhichshouldbeconsideredbutarebeyondthescopeofthisspecification.1.3ThevaluesstatedineitherSIunitsorinch-poundunitsaretoberegardedseparatelyasstandard.Thevaluesstatedineachsystemmaynotbeexactequivalents;therefore,eachsystemshallbeusedindependentlyoftheother.Combiningvaluesfromthetwosystemsmayresultinnon-conformancewiththestandard.1.4Thisstandardmayinvolvehazardousmaterials,opera-tions,andequipment.Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappropriatesafetyandhealthpracticesanddeter-minetheapplicabilityofregulatoryrequirementspriortouse.2.ReferencedDocuments2.1ASTMStandards:2D471TestMethodforRubberProperty—EffectofLiquidsD573TestMethodforRubber—DeteriorationinanAirOvenD751TestMethodsforCoatedFabricsD1149TestMethodsforRubberDeterioration—CrackinginanOzoneControlledEnvironmentD1204TestMethodforLinearDimensionalChangesofNonrigidThermoplasticSheetingorFilmatElevatedTemperatureD2137TestMethodsforRubberProperty—BrittlenessPointofFlexiblePolymersandCoatedFabricsD5538PracticeforThermoplasticElastomers—TerminologyandAbbreviationsD7635/D7635MTestMethodforMeasurementofThick-nessofCoatingsOverFabricReinforcementG151PracticeforExposingNonmetallicMaterialsinAc-celeratedTestDevicesthatUseLaboratoryLightSourcesG155PracticeforOperatingXenonArcLightApparatusforExposureofNon-MetallicMaterials3.MaterialsandManufacture3.1Thesheetshallbeformulatedfromethyleneandhigheralpha-olefinpolymers,copolymers,andmixturesthereof,inamountsgreaterthan50%,byweightofthetotalpolymercontentsuitablycompoundedtosatisfythephysicalrequire-mentsinthespecification(seePracticeD5538).3.2Thesheetshallbecapableofbeingheatwelded,fused,oradhesivelybondedtoitselfformakingwatertightfieldsplicesandrepairs,andthesupplierorfabricatorshallrecom-mendsuitablemethodsandmaterials.3.3Sheetshallbereinforcedwithfabricorscrim.4.PhysicalPropertiesandTolerances4.1EachsheetspecimenshallmeetorexceedthephysicalrequirementsprescribedinTable1.4.2Thetolerancefortimeconditions(aging,weathering,andsoforth)is615minor61%oftheperiod,whicheverisgreater,unlessotherwisespecified.4.3Thetolerancefortemperatureconditions(aging,weath-ering,andsoforth)is62°C[64°F]ofthespecifiedtempera-ture,unlessotherwisespecified.5.DimensionsandPermissibleVariations5.1Thewidthandlengthofthesheetshallbeagreeduponbetweenthepurchaserandthesupplier.5.1.1Thewidthandlengthtoleranceshallbe+3%,−0%.1ThisspecificationisunderthejurisdictionofASTMCommitteeD08onRoofingandWaterproofingandisthedirectresponsibilityofSubcommitteeD08.18onNonbituminousOrganicRoofCoverings.CurrenteditionapprovedJune1,2011.PublishedJune2011.Originallyapprovedin2003.Lastpreviouseditionapprovedin2011asD6878–11.DOI:10.1520/D6878_D6878M-11A.2ForreferencedASTMstandards,visittheASTMwebsite,@astm.org.ForAnnualBookofASTMStandardsvolumeinformation,refertothestandard’sDocumentSummarypageontheASTMwebsite.1Copyright(C)ASTMInternational.100BarrHarborDr.P.O.BoxC-700WestConshohocken,Pennsylvania19428-2959,UnitedStatesCopyrightbyASTMInt'l(allrightsreserved);FriJul1302:05:15EDT2012Downloaded/printedbyUniversityofScienceTechnologyBeijingpursuanttoLicenseAgreement.Nofurtherreproductionsauthorized.5.1.2Thethicknesstoleranceshallbe+15%,–10%ofthicknessagreeduponbythepurchaserandsupplier,butinnocaseshallitbelessthantheminimuminTable1.6.Workmanship,Finish,andAppearance6.1Thesheet,includingfactoryseams,ifpresent,shallbewatertightandfreeofpinholes,particlesofforeignmatter,protrudingfibersorreinforcement,undispersedrawmaterial,nicksandcuts,voids,thinareas,delaminationsorothermanufacturingdefectsthatmightadverselyaffectserviceabil-ity.6.2Edgesofthesheetsshallbecapableofbeingseamedtooneanotherwithoutfishmouthing.7.TestMethods7.1Dimensions—TestMethodsD751,afterpermittingthesheettorelaxat23°C[73°F]for1h.7.2Thickness,SheetOverall—RefertoTestMethodsD751.7.3ThicknessofCoatingOverScrim(ReinforcingFabric)—TestMethodD7635/D7635M.FollowpreparationproceduresasspecifiedinTestMethodD7635/D7635M.Thethicknessmeasurementsshallbeconductedasdescribedinthetestmethodonthecoatingonthesideintendedtobeexposedtotheweathe