Designation:D7405−20StandardTestMethodforMultipleStressCreepandRecovery(MSCR)ofAsphaltBinderUsingaDynamicShearRheometer1,2ThisstandardisissuedunderthefixeddesignationD7405;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.1.Scope1.1Thistestmethodcoversthedeterminationofpercentrecoveryandnon-recoverablecreepcomplianceofasphaltbindersbymeansofmultiplestresscreepandrecovery(MSCR)testing.TheMSCRtestisconductedusingthedynamicshearrheometer(DSR)ataspecifiedtemperature.1.2Thisstandardisappropriateforunagedmaterial,mate-rialagedinaccordancewithTestMethodD2872(RTFOT),materialagedinaccordancewithPracticeD6521(PAV),andmaterialagedinaccordancewithbothTestMethodD2872andPracticeD6521.NOTE1—ThemajorityofdevelopmentworkonthistestmethodwasperformedonmaterialagedinaccordancewithTestMethodD2872(RTFOT).1.3Thepercentrecoveryisintendedtoprovideameanstodeterminethepresenceofelasticresponseandstressdepen-denceofpolymer-modifiedandunmodifiedasphaltbinders.1.4ThevaluesstatedinSIunitsaretoberegardedasstandard.Nootherunitsofmeasurementareincludedinthisstandard.1.5Thetextofthisstandardreferencesnotesandfootnoteswhichprovideexplanatorymaterial.Thesenotesandfootnotes(excludingthoseintablesandfigures)shallnotbeconsideredasrequirementsofthestandard.1.6Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappro-priatesafety,health,andenvironmentalpracticesanddeter-minetheapplicabilityofregulatorylimitationspriortouse.1.7Thisinternationalstandardwasdevelopedinaccor-dancewithinternationallyrecognizedprinciplesonstandard-izationestablishedintheDecisiononPrinciplesfortheDevelopmentofInternationalStandards,GuidesandRecom-mendationsissuedbytheWorldTradeOrganizationTechnicalBarrierstoTrade(TBT)Committee.2.Referenc...
