Designation:D5249−10(Reapproved2021)StandardSpecificationforBackerMaterialforUsewithCold-andHot-AppliedJointSealantsinPortlandCementConcreteandAsphaltJoints1ThisstandardisissuedunderthefixeddesignationD5249;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.1.Scope1.1Thisspecificationcoversbackermaterialforcold-andhot-appliedjointsealantforuseinportlandcementconcreteorasphaltpavementjoints.1.2Thisspecificationestablishesbasicrequirementsforsealantbackermaterial,eitherinrodorstripform,thatcanwithstandthetemperatureofhot-orcold-appliedsealantswithoutexcessivedeformation.1.3Sealantbackermaterialservesoneormoreofthefollowingpurposes:1.3.1Limitstheamountanddepthofsealantappliedtoajoint,1.3.2Actsasabarrierinterfacetopreventbacksideadhe-sion(bondbreaker),and1.3.3Providesaformtoassistthesealantindevelopingashapefactor.1.4Thevaluesstatedininch-poundunitsaretoberegardedasthestandard.Thevaluesinparenthesesareforinformationpurposesonly.1.5Thefollowingsafetyhazardscaveatpertainsonlytothetestmethodsdescribedinthisspecification.Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappropriatesafety,health,andenviron-mentalpracticesanddeterminetheapplicabilityofregulatorylimitationspriortouse.1.6Thisinternationalstandardwasdevelopedinaccor-dancewithinternationallyrecognizedprinciplesonstandard-izationestablishedintheDecisiononPrinciplesfortheDevelopmentofInternationalStandards,GuidesandRecom-mendationsissuedbytheWorldTradeOrganizationTechnicalBarrierstoTrade(TBT)Committee.2.ReferencedDocuments2.1ASTMStandards:2C670PracticeforPreparingPrecisionandBiasStatementsforTestMethodsforConstructionMaterialsC1016TestMethodforDeterminationofWaterAbsorptionofSealantBacking(JointFiller)MaterialC1253TestMe...
