Designation:D312/D312M−15StandardSpecificationforAsphaltUsedinRoofing1ThisstandardisissuedunderthefixeddesignationD312/D312M;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.ThisstandardhasbeenapprovedforusebyagenciesoftheU.S.DepartmentofDefense.1.Scope1.1Thisspecificationcoversfourtypesofasphaltintendedforuseinbuilt-uproofconstruction,constructionofsomemodifiedbitumensystems,constructionofbituminousvaporretardersystems,andforadheringinsulationboardsusedinvarioustypesofroofsystems.Thespecificationisintendedforgeneralclassificationpurposesonly,anddoesnotimplyrestrictionsontheslopeatwhichanasphaltmustbeused.1.2ThevaluesstatedineitherSIunitsorinch-poundunitsaretoberegardedseparatelyasstandard.Thevaluesstatedineachsystemmaynotbeexactequivalents;therefore,eachsystemshallbeusedindependentlyoftheother.Combiningvaluesfromthetwosystemsmayresultinnon-conformancewiththestandard.1.3Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappro-priatesafetyandhealthpracticesanddeterminetheapplica-bilityofregulatorylimitationspriortouse.2.ReferencedDocuments2.1ASTMStandards:2D5TestMethodforPenetrationofBituminousMaterialsD36TestMethodforSofteningPointofBitumen(Ring-and-BallApparatus)D92TestMethodforFlashandFirePointsbyClevelandOpenCupTesterD113TestMethodforDuctilityofBituminousMaterialsD140PracticeforSamplingBituminousMaterialsD1079TerminologyRelatingtoRoofingandWaterproofingD2042TestMethodforSolubilityofAsphaltMaterialsinTrichloroethyleneD3461TestMethodforSofteningPointofAsphaltandPitch(MettlerCup-and-BallMethod)D4402TestMethodforViscosityDeterminationofAsphaltatElevatedTemperaturesUsingaRotationalViscometer3.MaterialsandManufacture3.1Theasphaltsshallbepreparedfromcrudepetroleum.4.Physical...
