Designation:D7012−14´1StandardTestMethodsforCompressiveStrengthandElasticModuliofIntactRockCoreSpecimensunderVaryingStatesofStressandTemperatures1ThisstandardisissuedunderthefixeddesignationD7012;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.ε1NOTE—EditoriallycorrectedlegendforEq3inAugust2017.1.Scope1.1Thesefourtestmethodscoverthedeterminationofthestrengthofintactrockcorespecimensinuniaxialandtriaxialcompression.MethodsAandBdeterminethetriaxialcompres-sivestrengthatdifferentpressuresandMethodsCandDdeterminetheunconfined,uniaxialstrength.1.2MethodsAandBcanbeusedtodeterminetheangleofinternalfriction,angleofshearingresistance,andcohesionintercept.1.3MethodsBandDspecifytheapparatus,instrumentation,andproceduresfordeterminingthestress-axialstrainandthestress-lateralstraincurves,aswellasYoung’smodulus,E,andPoisson’sratio,υ.Thesemethodsmakenoprovisionforporepressuremeasurementsandspeci-mensareundrained(platensarenotvented).Thus,thestrengthvaluesdeterminedareintermsoftotalstressandarenotcorrectedforporepressures.Thesetestmethodsdonotincludetheproceduresnecessarytoobtainastress-straincurvebeyondtheultimatestrength.1.4OptionAallowsfortestingatdifferenttemperaturesandcanbeappliedtoanyofthetestmethods,ifrequested.1.5ThisstandardreplacesandcombinesthefollowingStandardTestMethods:D2664TriaxialCompressiveStrengthofUndrainedRockCoreSpecimensWithoutPorePressureMeasurements;D5407ElasticModuliofUndrainedRockCoreSpecimensinTriaxialCompressionWithoutPorePressureMeasurements;D2938UnconfinedCompressiveStrengthofIntactRockCoreSpecimens;andD3148ElasticModuliofIntactRockCoreSpecimensinUniaxialCompression.TheoriginalfourstandardsarenowreferredtoasMethodsinthisstandard.1.5.1MethodA:TriaxialCompressiveStrengthofUndrainedRockCoreSpecimensWithoutPorePressureMea-surements.1.5.1.1M...
