Designation:D2171/D2171M−18StandardTestMethodforViscosityofAsphaltsbyVacuumCapillaryViscometer1ThisstandardisissuedunderthefixeddesignationD2171/D2171M;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.ThisstandardhasbeenapprovedforusebyagenciesoftheU.S.DepartmentofDefense.Thistestmethodhasbeenapprovedbythesponsoringcommitteesandacceptedbythecooperatingsocietiesinaccordancewithestablishedprocedures.1.Scope1.1Thistestmethodcoversproceduresforthedetermina-tionoftheapparentviscosityofasphaltbinderbyvacuumcapillaryviscometersat60°C[140°F].Itisapplicabletomaterialshavingviscositiesintherangefrom0.0036toover20000Pa·s[0.036toover200000P].NOTE1—Thistestmethodissuitableforuseatothertemperatures,buttheprecisionisbasedondeterminationsonasphaltbindersat60°C[140°F].NOTE2—Modifiedasphaltbindersorasphaltbindersthathavebeenconditionedorrecoveredaretypicallynon-Newtonianunderthecondi-tionsofthistest.Theapparentviscosityfornon-Newtonianasphaltbindersvarieswithshearrate.Whentheflowisnon-Newtonianinacapillarytube,theshearratedeterminedusingthistestmethodmaybeinvalid.Thepresenceofnon-Newtonianbehaviorforthetestconditionsofthistestcanbeverifiedbymeasuringtheviscositywithviscometershavingdifferent-sizedcapillarytubesorwithdifferentpressureheads.ThedefinedprecisionlimitsinSection11maynotbeapplicabletonon-Newtonianasphaltbinders.TestMethodD4957maybeamoreapplicablemethodfortestingnon-Newtonianasphalts.1.2ThevaluesstatedineitherSIunitsorinch-poundunitsaretoberegardedseparatelyasstandard.Thevaluesstatedineachsystemmaynotbeexactequivalents;therefore,eachsystemshallbeusedindependentlyoftheother.Combiningvaluesfromthetwosystemsmayresultinnonconformancewiththestandard.1.3Warning—MercuryhasbeendesignatedbytheUnitedStatesEnvironmentalProtectionAgency(EPA)andmanystateagenciesasahazardo...
