Designation:C42/C42M−16AmericanAssociationStateHighwayandTransportationOfficialsStandardAASHTONo.:T24StandardTestMethodforObtainingandTestingDrilledCoresandSawedBeamsofConcrete1ThisstandardisissuedunderthefixeddesignationC42/C42M;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.ThisstandardhasbeenapprovedforusebyagenciesoftheU.S.DepartmentofDefense.1.Scope*1.1Thistestmethodcoversobtaining,preparing,andtest-ingcoresdrilledfromconcreteforlengthorcompressivestrengthorsplittingtensilestrengthdeterminations.Thistestmethodisnotapplicabletocoresfromshotcrete.NOTE1—TestMethodC1604/C1604Misapplicableforobtaining,preparing,andtestingcoresfromshotcrete.NOTE2—AppendixX1providesrecommendationsforobtainingandtestingsawedbeamsforflexuralperformance.1.2ThevaluesstatedineitherSIunitsorinch-poundunitsaretoberegardedseparatelyasstandard.Thevaluesstatedineachsystemmaynotbeexactequivalents;therefore,eachsystemshallbeusedindependentlyoftheother.Combiningvaluesfromthetwosystemsmayresultinnon-conformancewiththestandard.1.3Thetextofthisstandardreferencesnotesandfootnotesthatprovideexplanatorymaterial.Thesenotesandfootnotes(excludingthoseintablesandfigures)shallnotbeconsideredasrequirementsofthestandard.1.4Thisstandarddoesnotpurporttoaddressthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappropriatesafetyandhealthpracticesanddeterminetheapplicabilityofregulatorylimitationspriortouse.2.ReferencedDocuments2.1ASTMStandards:2C39/C39MTestMethodforCompressiveStrengthofCylin-dricalConcreteSpecimensC78/C78MTestMethodforFlexuralStrengthofConcrete(UsingSimpleBeamwithThird-PointLoading)C174/C174MTestMethodforMeasuringThicknessofCon-creteElementsUsingDrilledConcreteCoresC496/C496MTestMethodforSplittingTensileStrengthofCylindricalConcreteSpeci...
