Designation:D7064/D7064M−21StandardPracticeforOpen-GradedFrictionCourse(OGFC)AsphaltMixtureDesign1ThisstandardisissuedunderthefixeddesignationD7064/D7064M;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.1.Scope1.1Thispracticecoversthemixdesignofopen-gradedfrictioncourse(OGFC)usingtheSuperpaveGyratoryCom-pactor(SGC)orothersuitableformsofcompaction.TheOGFCasphaltmixturedesignisbasedonthevolumetricpropertiesoftheasphaltmixtureintermsofairvoidsandthepresenceofstone-on-stonecontact.InformationfoundinGuideD6932/D6932Mshouldbereviewedbeforestartingthemixdesign.Whereapplicable,SpecificationD3666shouldbeappliedasaminimumforagenciestestingandinspectingroadandpavingmaterials.1.2ThevaluesstatedineitherSIunitsorinch-poundunitsaretoberegardedseparatelyasstandard.Thevaluesstatedineachsystemmaynotbeexactequivalents;therefore,eachsystemshallbeusedindependentlyoftheother.Combiningvaluesfromthetwosystemsmayresultinnonconformancewiththestandard.1.3Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappro-priatesafety,health,andenvironmentalpracticesanddeter-minetheapplicabilityofregulatorylimitationspriortouse.1.4Thisinternationalstandardwasdevelopedinaccor-dancewithinternationallyrecognizedprinciplesonstandard-izationestablishedintheDecisiononPrinciplesfortheDevelopmentofInternationalStandards,GuidesandRecom-mendationsissuedbytheWorldTradeOrganizationTechnicalBarrierstoTrade(TBT)Committee.2.ReferencedDocuments2.1ASTMStandards:2C29/C29MTestMethodforBulkDensity(“UnitWeight”)andVoidsinAggregateC127TestMethodforRelativeDensity(SpecificGravity)andAbsorptionofCoarseAggregateC131/C131MTestMethodforResistancetoDegradationofSmall-SizeCoarseAggregatebyAbrasionandImpactintheLosAngelesMachineC136/C1...
