Designation:D8138−18StandardSpecificationforPreformedSiliconeJointSealingSystemforBridges1ThisstandardisissuedunderthefixeddesignationD8138;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.1.Scope1.1Thisspecificationcoversthematerialrequirementsforpreformedsiliconejointsealsforbridges.Thesealconsistsofasiliconerubberglandpreformedtoacontinuouslength.Itsdesignshallpreventanytensionfromoccurringinthesealorbondingpointduringnormalmovement.Thesealisinstalledbybondingittothejointheaderwithasilicone-basedadhesiveandisdesignedtosealthejoint,preventingliquidintrusion.1.2Thevaluesgiveninparenthesesaremathematicalcon-versionstoSIunitsthatareprovidedforinformationonlyandarenotconsideredstandard.1.3Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappro-priatesafety,health,andenvironmentalpracticesanddeter-minetheapplicabilityofregulatorylimitationspriortouse.1.4Thisinternationalstandardwasdevelopedinaccor-dancewithinternationallyrecognizedprinciplesonstandard-izationestablishedintheDecisiononPrinciplesfortheDevelopmentofInternationalStandards,GuidesandRecom-mendationsissuedbytheWorldTradeOrganizationTechnicalBarrierstoTrade(TBT)Committee.2.ReferencedDocuments2.1ASTMStandards:2C639TestMethodforRheological(Flow)PropertiesofElastomericSealantsC679TestMethodforTack-FreeTimeofElastomericSeal-antsC793TestMethodforEffectsofLaboratoryAcceleratedWeatheringonElastomericJointSealantsD395TestMethodsforRubberProperty—CompressionSetD412TestMethodsforVulcanizedRubberandThermoplas-ticElastomers—TensionD573TestMethodforRubber—DeteriorationinanAirOvenD624TestMethodforTearStrengthofConventionalVul-canizedRubberandThermoplasticElastomersD2240TestMethodforRubberProperty—DurometerHard-ness3.Materia...
