Designation:D6999−12StandardPracticeforMiscibilityofEmulsifiedAsphalts1ThisstandardisissuedunderthefixeddesignationD6999;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.1.Scope1.1Thispracticecoversthesuitabilityofallmediumandslow-settingemulsifiedasphaltstobedilutedwithwater..Itisnotapplicabletotherapid-settingtypes.1.2Thispracticedoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappro-priatesafetyandhealthpracticesanddeterminetheapplica-bilityofregulatorylimitationspriortouse.2.SampleConditioningforTesting2.1Allemulsifiedasphaltsshallbeproperlystirredtoachievehomogeneity.2.2Allemulsifiedasphaltswithviscositytestingrequire-mentsof50°Cshallbeheatedto5063°Cintheoriginalsamplecontainerinawaterbathoroven.Thecontainershouldbeventedtorelievepressure.Afterthesamplereaches5063°C,stirthesampletoachievehomogeneity.2.3Emulsifiedasphaltswithviscositytestingrequirementsof25°Cshouldbemixedorstirredat2563°Cintheoriginalsamplecontainertoachievehomogeneity.NOTE1—Emulsifiedasphaltswithviscositytestingrequirementsof25°Cmaybeheatedandstirredasspecifiedin2.2,ifnecessary.Intheeventthe2.2methodisused,thesampleshouldbecooledto2563°C.3.SignificanceandUse3.1Itissometimesdesirabletodiluteanemulsifiedasphaltinthefieldwithwater.Thispracticeisdesignedtoascertainifthismaybedonewithoutirreversiblyseparatingthewaterandasphalt(breaking)intheemulsifiedasphalt.NOTE2—Watersuppliesavailableinsomeareascontainhighlevelsofdissolvedsaltsandothermineralswhichcoalesce(break)emulsifiedasphaltstoagreaterdegreethandistilledordeionizedwater.Itisrecommendedthattheuserevaluatepotentiallocaljobsitewatersourcessuchastapwaterusingthispracticebeforeattemptingafielddilution.4.ApparatusandMaterials4.1Beaker—glass,400mLcapacit...
