Designation:D6998−11StandardPracticeforEvaluatingAggregateCoatingusingEmulsifiedAsphalts1ThisstandardisissuedunderthefixeddesignationD6998;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.1.Scope1.1Thispracticecoversthoseemulsifiedasphaltsintendedforusebymixingwithaggregate.Itisnotapplicabletorapid-settingtypesordilutedmaterialsusedfortackcoats,priming,ormulchtreatments.1.2ThevaluesstatedinSIaretoberegardedasstandard.Nootherunitsofmeasurementareincludedinthisstandard.1.3Thispracticedoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappro-priatesafetyandhealthpracticesanddeterminetheapplica-bilityofregulatorylimitationspriortouse.2.ReferencedDocuments2.1ASTMStandards:2E11SpecificationforWovenWireTestSieveClothandTestSieves3.SampleConditioningforTesting3.1Allemulsifiedasphaltsshallbeproperlystirredtoachievehomogeneity.3.2Allemulsifiedasphaltswithviscositytestingrequire-mentsof50°Cshallbeconditionedto5063°Cinasamplecontainerinawaterbathoroven.Thecontainershouldbeventedtorelievepressure.Afterthesamplereaches5063°C,stirthesampletoachievehomogeneity.3.3Emulsifiedasphaltswithviscositytestingrequirementsof25°Cshallbeconditionedto2563°Cinasamplecontainertoachievehomogeneity.thesamplereaches2563°C,stirthesampletoachievehomogeneity.NOTE1—Emulsifiedasphaltswithviscositytestingrequirementsof25°Cmaybeheatedandstirredasspecifiedin3.2,ifnecessary.Intheeventthe3.2methodisused,thesampleshouldbecooledto2563°C.4.SignificanceandUse4.1Theintentofthispracticeistoensurethatagivenmixinggradeemulsifiedasphaltisstableenoughandotherwisepossessestheabilitytomixwithareferencestonefortheprescribedtime,andcoatituniformlyandthoroughly.5.ApparatusandMaterial5.1Sieves—Standard19.0-mmand6.3-mmsievesconform-i...
