Designation:D4989/D4989M−90a(Reapproved2014)´1StandardTestMethodforApparentViscosity(Flow)ofRoofingBitumensUsingtheParallelPlatePlastometer1ThisstandardisissuedunderthefixeddesignationD4989/D4989M;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.ε1NOTE—UnitsinformationwaseditoriallycorrectedinJanuary2014.1.Scope1.1Thistestmethodcoversthemeasurementofapparentviscosityofroofingbitumenbymeansofaparallelplateplastometer.Thistestmethodisapplicableforaviscosityrangefrom102to109Pa·s[103to1010poises].SeeNote1.NOTE1—Thisrelativelysimpletestmethodofmeasuringviscosityusespre-determinedarbitraryshearstresslevels.Sinceroofingbitumensarenon-Newtonian,otherviscositytestmethodsmaygivedifferentresults.1.2ThevaluesstatedineitherSIunitsorinch-poundunitsaretoberegardedseparatelyasstandard.Thevaluesstatedineachsystemmaynotbeexactequivalents;therefore,eachsystemshallbeusedindependentlyoftheother.Combiningvaluesfromthetwosystemsmayresultinnon-conformancewiththestandard.1.3Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappro-priatesafetyandhealthpracticesanddeterminetheapplica-bilityofregulatorylimitationspriortouse.2.ReferencedDocuments2.1ASTMStandards:2D140PracticeforSamplingBituminousMaterialsD312SpecificationforAsphaltUsedinRoofingD450SpecificationforCoal-TarPitchUsedinRoofing,Dampproofing,andWaterproofingD2171TestMethodforViscosityofAsphaltsbyVacuumCapillaryViscometerD3205TestMethodforViscosityofAsphaltwithConeandPlateViscometer(Withdrawn2000)33.Terminology3.1Definitions—SeedefinitionsofviscositygiveninTestMethodsD2171andD3205.4.SummaryofTestMethod4.1Thesampleismoldedintoadiscofspecifieddimensions,heatedtotheselectedtemperature,placedbetweentheplatesofthepre-heatedapparatusandpre...
