Designation:C173/C173M−16StandardTestMethodforAirContentofFreshlyMixedConcretebytheVolumetricMethod1ThisstandardisissuedunderthefixeddesignationC173/C173M;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.ThisstandardhasbeenapprovedforusebyagenciesoftheU.S.DepartmentofDefense.1.Scope*1.1Thistestmethodcoversdeterminationoftheaircontentoffreshlymixedconcretecontaininganytypeofaggregate,whetheritbedense,cellular,orlightweight.1.2ThevaluesstatedineitherSIunitsorinch-poundunitsaretoberegardedseparatelyasstandard.Theinch-poundunitsareshowninbrackets.Thevaluesstatedineachsystemmaynotbeexactequivalents;therefore,eachsystemshallbeusedindependentlyoftheother.Combiningvaluesfromthetwosystemsmayresultinnon-conformancewiththestandard.1.3Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappro-priatesafetyandhealthpracticesanddeterminetheapplica-bilityofregulatorylimitationspriortouse.(Warning—Freshhydrauliccementitiousmixturesarecausticandmaycausechemicalburnstoskinandtissueuponprolongedexposure.2)2.ReferencedDocuments2.1ASTMStandards:3C29/C29MTestMethodforBulkDensity(“UnitWeight”)andVoidsinAggregateC31/C31MPracticeforMakingandCuringConcreteTestSpecimensintheFieldC138/C138MTestMethodforDensity(UnitWeight),Yield,andAirContent(Gravimetric)ofConcreteC143/C143MTestMethodforSlumpofHydraulic-CementConcreteC172PracticeforSamplingFreshlyMixedConcreteC173/C173MTestMethodforAirContentofFreshlyMixedConcretebytheVolumetricMethodC231TestMethodforAirContentofFreshlyMixedCon-cretebythePressureMethodC670PracticeforPreparingPrecisionandBiasStatementsforTestMethodsforConstructionMaterialsC1064/C1064MTestMethodforTemperatureofFreshlyMixedHydraulic-CementConcrete3.SignificanceandUse3.1Thistestmethodco...
