astm-c-39-2005e1

Designation:C39/C39M–05e1StandardTestMethodforCompressiveStrengthofCylindricalConcreteSpecimens1ThisstandardisissuedunderthefixeddesignationC39/C39M;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(e)indicatesaneditorialchangesincethelastrevisionorreapproval.ThisstandardhasbeenapprovedforusebyagenciesoftheDepartmentofDefense.e1NOTE—Note1wascorrectededitoriallyinSeptember2006.1.Scope1.1Thistestmethodcoversdeterminationofcompressivestrengthofcylindricalconcretespecimenssuchasmoldedcylindersanddrilledcores.Itislimitedtoconcretehavingaunitweightinexcessof50lb/ft3[800kg/m3].1.2Thevaluesstatedineitherinch-poundorSIunitsaretoberegardedseparatelyasstandard.TheSIunitsareshowninbrackets.Thevaluesstatedineachsystemmaynotbeexactequivalents;therefore,eachsystemshallbeusedindependentlyoftheother.Combiningvaluesfromthetwosystemsmayresultinnonconformancewiththestandard.1.3Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappro-priatesafetyandhealthpracticesanddeterminetheapplica-bilityofregulatorylimitationspriortouse.(Warning—Meansshouldbeprovidedtocontainconcretefragmentsduringsuddenruptureofspecimens.Tendencyforsuddenruptureincreaseswithincreasingconcretestrengthanditismorelikelywhenthetestingmachineisrelativelyflexible.ThesafetyprecautionsgivenintheManualofAggregateandConcreteTestingarerecommended.)1.4Thetextofthisstandardreferencesnoteswhichprovideexplanatorymaterial.Thesenotesshallnotbeconsideredasrequirementsofthestandard.2.ReferencedDocuments2.1ASTMStandards:2C31/C31MPracticeforMakingandCuringConcreteTestSpecimensintheFieldC42/C42MTestMethodforObtainingandTestingDrilledCoresandSawedBeamsofConcreteC192/C192MPracticeforMakingandCuringConcreteTestSpecimensintheLaboratoryC617PracticeforCappingCylindricalConcreteSpeci-mensC670PracticeforPreparingPrecisionandBiasStatementsforTestMethodsforConstructionMaterialsC873TestMethodforCompressiveStrengthofConcreteCylindersCastinPlaceinCylindricalMoldsC1077PracticeforLaboratoriesTestingConcreteandCon-creteAggregatesforUseinConstructionandCriteriaforLaboratoryEvaluationC1231/C1231MPracticeforUseofUnbondedCapsinDeterminationofCompressiveStrengthofHardenedCon-creteCylindersE4PracticesforForceVerificationofTestingMachinesE74PracticeofCalibrationofForce-MeasuringInstru-mentsforVerifyingtheForceIndicationofTestingMa-chinesManualofAggregateandConcreteTesting3.SummaryofTestMethod3.1Thistestmethodconsistsofapplyingacompressiveaxialloadtomoldedcylindersorcoresataratewhichiswithinaprescribedrangeuntilfailureoccurs.Thecompressivestrengthofthespecimeniscalculatedbydividingthemaxi-mumloadattainedduringthetestbythecross-sectionalareaofthespecimen.4.SignificanceandUse4.1Caremustbeexercisedintheinterpretationofthesignificanceofcompressivestrengthdeterminationsbythistestmethodsincestrengthisnotafundamentalorintrinsicpropertyofconcretemadefromgivenmaterials.Valuesobtainedwilldependonthesizeandshapeofthespecimen,batching,mixing1ThistestmethodisunderthejurisdictionofASTMCommitteeC09onConcreteandConcreteAggregatesandisthedirectresponsibilityofSubcommitteeC09.61onTestingConcreteforStrength.CurrenteditionapprovedNov.1,2005.PublishedNovember2005.Originallyapprovedin1921.Lastpreviouseditionapprovedin2004asC39/C39M–04a.2ForreferencedASTMstandards,visittheASTMwebsite,@astm.org.ForAnnualBookofASTMStandardsvolumeinformation,refertothestandard’sDocumentSummarypageontheASTMwebsite.1Copyright©ASTMInternational,100BarrHarborDrive,POBoxC700,WestConshohocken,PA19428-2959,UnitedStates.CopyrightASTMInternationalProvidedbyIHSunderlicensewithASTMNotforResaleNoreproductionornetworkingpermittedwithoutlicensefromIHS--`,,```,,,,````-`-`,,`,,`,`,,`---procedures,themethodsofsampling,molding,andfabricationandtheage,temperature,andmoistureconditionsduringcuring.4.2Thistestmethodisusedtodeterminecompressivestrengthofcylindricalspecimenspreparedandcuredinaccor-dancewithPracticesC31/C31M,C192/C192M,C617,andC1231/C1231MandTestMethodsC42/C42MandC873.4.3Theresultsofthistestmethodareusedasabasisforqualitycontrolofconcreteproportioning,mixing,andplacingoperations;determinationofcompliancewithspecifications;controlforevaluatingeffectivenessofadmixtures;andsimilaruses.4.4Theindividualwhotestsconcretecylindersforaccep-tancetestingshallmeettheconcretelaboratorytechnicianrequirementsofPracticeC1077,includinganexaminationrequiringperformancedemonstrationthatisevaluatedbyanindependentexaminer.NOTE1—CertificationequivalenttotheminimumguidelinesforACIConcreteLaboratoryTechnician,LevelIorACIConcreteStrengthTestingTechnicianwillsatisfythisrequirement.5.Apparatus5.1TestingMachine—Thetestingmachineshallbeofatypehavingsufficientcapacityandcapableofprovidingtheratesofloadingprescribedin7.5.5.1.1Verifycalibrationofthetestingmachinesinaccor-dancewithPracticesE4,exceptthattheveri