Designation:D6928−17StandardTestMethodforResistanceofCoarseAggregatetoDegradationbyAbrasionintheMicro-DevalApparatus1ThisstandardisissuedunderthefixeddesignationD6928;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.1.Scope1.1ThistestmethodcoversaprocedurefortestingcoarseaggregateforresistancetoabrasionusingtheMicro-Devalapparatus.1.2ThevaluesstatedinSIunitsaretoberegardedasstandard.Nootherunitsofmeasurementareincludedinthisstandard.1.3Thetextofthismethodreferencesnotesandfootnoteswhichprovideexplanatorymaterial.Thesenotesandfootnotes(excludingthoseintablesandfigures)shallnotbeconsideredasrequirementsofthetestmethod.1.4Thisproceduremayinvolvehazardousmaterials,operations,andequipment.Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappropriatesafetyandhealthpracticesanddeter-minetheapplicabilityofregulatorylimitationspriortouse.1.5Thisinternationalstandardwasdevelopedinaccor-dancewithinternationallyrecognizedprinciplesonstandard-izationestablishedintheDecisiononPrinciplesfortheDevelopmentofInternationalStandards,GuidesandRecom-mendationsissuedbytheWorldTradeOrganizationTechnicalBarrierstoTrade(TBT)Committee.2.ReferencedDocuments2.1ASTMStandards:2C136TestMethodforSieveAnalysisofFineandCoarseAggregatesC670PracticeforPreparingPrecisionandBiasStatementsforTestMethodsforConstructionMaterialsE11SpecificationforWovenWireTestSieveClothandTestSieves3.Terminology3.1Definitions:3.1.1constantmass,n—theconditionofatestsampledriedatatemperatureof11065°Csuchthatitwillnotlosemorethan0.1%moistureafter2hofdrying.3.1.1.1Discussion—Suchaconditionofdrynesscanbeverifiedbydeterminingthemassofthesamplebeforeandaftersuccessive2-hdryingperiods.Inlieuofsuchadetermination,samplesmaybeconsidere...
