Designation:D71−94(Reapproved2019)StandardTestMethodforRelativeDensityofSolidPitchandAsphalt(DisplacementMethod)1ThisstandardisissuedunderthefixeddesignationD71;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.ThisstandardhasbeenapprovedforusebyagenciesoftheU.S.DepartmentofDefense.1.Scope1.1Thistestmethodcoversthedeterminationofrelativedensitybywaterdisplacementofhardpitchesandasphaltswithsofteningpointsabove70°C.1.2Therelativedensityofhardpitchandasphaltshallbedetermined,wheneverpossible,onhomogeneousnaturalfrag-mentsfreeofcracks.Theuseofcastcubesisnotrecommendedduetothedifficultyofavoidingincorporationofairbubbles.1.3ThevaluesstatedinSIunitsaretoberegardedasstandard.Nootherunitsofmeasurementareincludedinthisstandard.1.4Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappro-priatesafety,health,andenvironmentalpracticesanddeter-minetheapplicabilityofregulatorylimitationspriortouse.1.5Thisinternationalstandardwasdevelopedinaccor-dancewithinternationallyrecognizedprinciplesonstandard-izationestablishedintheDecisiononPrinciplesfortheDevelopmentofInternationalStandards,GuidesandRecom-mendationsissuedbytheWorldTradeOrganizationTechnicalBarrierstoTrade(TBT)Committee.2.ReferencedDocuments2.1ASTMStandards:2D61TestMethodforSofteningPointofPitches(Cube-in-WaterMethod)D140PracticeforSamplingAsphaltMaterialsD4296PracticeforSamplingPitch3.Terminology3.1Definitions:3.1.1relativedensity—theratioofagivenvolumeofmaterialat25°Ctothemassofanequalvolumeofwateratthesametemperature(specificgravity).4.SummaryofTestMethod4.1Thesampleissuspendedfromathinwireandweighed,firstinair,thensubmergedinwaterat25.0°C.Therelativedensityiscalculatedfromthesemasses.5.SignificanceandUse5.1Thistestmethod...
