Designation:D6929−10StandardPracticeforFreezingofEmulsifiedAsphalts1ThisstandardisissuedunderthefixeddesignationD6929;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.1.Scope1.1Emulsifiedasphaltisnormallydamagedbyfreezingtemperatures,butspeciallyformulatedmaterialsareexpectedtopassthispractice.1.2ThevaluesstatedinSIunitsaretoberegardedasstandard.Nootherunitsofmeasurementareincludedinthisstandard.1.3Thispracticedoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappro-priatesafetyandhealthpracticesanddeterminetheapplica-bilityofregulatorylimitationspriortouse.2.SignificanceandUse2.1Certainagencies,whodesiretouse,store,ortransportemulsifiedasphaltunderlessthanidealweatherconditions,mayrequirethattheproductremainhomogeneous(unbroken)afterbeingsubjectedtotemperaturesof−18°C.3.SampleConditioning3.1Allemulsifiedasphaltsshallbeproperlystirredtoachievehomogeneity.3.2Allemulsifiedasphaltswithviscositytestingrequire-mentsof50°Cshallbeheatedto5063°Cintheoriginalsamplecontainerinawaterbathoroven.Thecontainershouldbeventedtorelievepressure.Afterthesamplereaches5063°C,stirthesampletoachievehomogeneity.3.3Emulsifiedasphaltswithviscositytestingrequirementsof25°Cshouldbemixedorstirredat2563°Cintheoriginalsamplecontainertoachievehomogeneity.NOTE1—Emulsifiedasphaltswithviscositytestingrequirementsof25°Cmaybeheatedandstirredasspecifiedin3.2,ifnecessary.Intheeventthe3.2methodisused,thesampleshouldbecooledto2563°C.4.Apparatus4.1Freezer—Capableofmaintainingatesttemperatureof-1865°C.4.2MetalContainer—suchasa500mLpress-topcan.4.3GlassStirringRod—ofoptionalsize.5.Procedure5.1Placeapproximately400goftheemulsifiedasphaltinacleanmetalcontainer.5.2Exposetheemulsifiedasphaltintheclosedcontainertoanai...
