Designation:D4767−11StandardTestMethodforConsolidatedUndrainedTriaxialCompressionTestforCohesiveSoils1ThisstandardisissuedunderthefixeddesignationD4767;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.1.Scope*1.1Thistestmethodcoversthedeterminationofstrengthandstress-strainrelationshipsofacylindricalspecimenofeitheranintact,reconstituted,orremoldedsaturatedcohesivesoil.Specimensareisotropicallyconsolidatedandshearedincompressionwithoutdrainageataconstantrateofaxialdeformation(straincontrolled).1.2Thistestmethodprovidesforthecalculationoftotalandeffectivestresses,andaxialcompressionbymeasurementofaxialload,axialdeformation,andpore-waterpressure.1.3ThistestmethodprovidesdatausefulindeterminingstrengthanddeformationpropertiesofcohesivesoilssuchasMohrstrengthenvelopesandYoung’smodulus.Generally,threespecimensaretestedatdifferenteffectiveconsolidationstressestodefineastrengthenvelope.1.4Thedeterminationofstrengthenvelopesandthedevel-opmentofrelationshipstoaidininterpretingandevaluatingtestresultsarebeyondthescopeofthistestmethodandmustbeperformedbyaqualified,experiencedprofessional.1.5AllobservedandcalculatedvaluesshallconformtotheguidelinesforsignificantdigitsandroundingestablishedinPracticeD6026.1.5.1Themethodsusedtospecifyhowdataarecollected,calculated,orrecordedinthisstandardareregardedastheindustrystandard.Inaddition,theyarerepresentativeofthesignificantdigitsthatgenerallyshouldberetained.Theproce-duresuseddonotconsidermaterialvariation,purposeforobtainingthedata,specialpurposestudiesoranyconsiderationofenduse.Itisbeyondthescopeofthistestmethodtoconsidersignificantdigitsusedinanalysismethodsforengi-neeringdesign.1.6Units—ThevaluesstatedinSIunitsaretoberegardedasstandard.Theinch-poundunitsgiveninparenthesesaremathematicalconversionswhichareprovidedforinform...
