Designation:C1646/C1646M−16StandardPracticeforMakingandCuringTestSpecimensforEvaluatingResistanceofCoarseAggregatetoFreezingandThawinginAir-EntrainedConcrete1ThisstandardisissuedunderthefixeddesignationC1646/C1646M;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.1.Scope*1.1Thispracticecoversproceduresformakingandcuringtestspecimensforevaluatingresistanceofnormal-weightcoarseaggregatestofreezingandthawinginair-entrainedconcreteinaccordancewithTestMethodC666/C666M,Pro-cedureAorB.1.2ThevaluesstatedineitherSIunitsorinch-poundunitsaretoberegardedseparatelyasstandard.Thevaluesstatedineachsystemmaynotbeexactequivalents;therefore,eachsystemshallbeusedindependentlyoftheother.Combiningvaluesfromthetwosystemsmayresultinnon-conformancewiththestandard.1.3Thispracticedoesnotpurporttoaddressallthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappropriatesafetyandhealthpracticesanddeterminetheapplicabilityofregulatorylimitationspriortouse.(Warning—Freshhydrauliccementi-tiousmixturesarecausticandmaycausechemicalburnstoskinandtissueuponprolongeduse.2)2.ReferencedDocuments2.1ASTMStandards:3C33SpecificationforConcreteAggregatesC39/C39MTestMethodforCompressiveStrengthofCylin-dricalConcreteSpecimensC125TerminologyRelatingtoConcreteandConcreteAg-gregatesC143/C143MTestMethodforSlumpofHydraulic-CementConcreteC150SpecificationforPortlandCementC173/C173MTestMethodforAirContentofFreshlyMixedConcretebytheVolumetricMethodC192/C192MPracticeforMakingandCuringConcreteTestSpecimensintheLaboratoryC231TestMethodforAirContentofFreshlyMixedCon-cretebythePressureMethodC490PracticeforUseofApparatusfortheDeterminationofLengthChangeofHardenedCementPaste,Mortar,andConcreteC494/C494MSpecificationforChemicalAdmixturesforConcreteC666/C666MTestMethodfor...
