Designation:D7173−14StandardPracticeforDeterminingtheSeparationTendencyofPolymerfromPolymerModifiedAsphalt1ThisstandardisissuedunderthefixeddesignationD7173;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.1.Scope1.1Thispracticedescribesalaboratoryprocedureforde-terminingthetendencyofpolymertoseparatefrompolymermodifiedasphaltunderstaticheatedstorageconditions.Theresultsoftestingonmaterialpreparedaccordingtothispracticemaybeusedasaguidelinewhenformulatingproductsortoestablishfieldhandlingprocedures.Largedifferencesintestresultsbetweentopandbottomspecimensindicatethatthereisadegreeofincompatibilitybetweenthepolymerandthebaseasphalt.1.2ThevaluesstatedinSIunitsaretoberegardedasthestandard.Nootherunitsofmeasurementareincludedinthisstandard.1.3Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappro-priatesafetyandhealthpracticesandtodeterminetheapplicabilityofregulatorylimitationspriortouse.2.ReferencedDocuments2.1ASTMStandards:2D36TestMethodforSofteningPointofBitumen(Ring-and-BallApparatus)D7175TestMethodforDeterminingtheRheologicalProp-ertiesofAsphaltBinderUsingaDynamicShearRheom-eter3.SummaryofPractice3.1Ameasuredquantityofpolymermodifiedasphaltinasealedaluminumtubeisconditionedinaverticalpositionfor48hatatemperatureof16365°C.Attheendoftheconditioningperiod,topandbottomportionsareseparatedandsubjectedtofurthertestingtodeterminethedegreeofsepara-tion.Testschosenforthispurposedependonthepolymermodificationsystembeingevaluatedandthetypeofinforma-tiondesiredbytheuser.SofteningPoint(TestMethodD36)andDSR(TestMethodD7175)arethemostcommontestsusedforthispurpose.4.SignificanceandUse4.1Purchasersofpolymermodifiedasphaltneedtobegivenguidelinesonproperstorageandhandlingprocedurestom...
