Designation:D8296−19StandardTestMethodforConsolidatedUndrainedCyclicDirectSimpleShearTestunderConstantVolumewithLoadControlorDisplacementControl1ThisstandardisissuedunderthefixeddesignationD8296;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.1.Scope1.1Thistestmethoddefinesequipmentspecificationsandtestingproceduresforthemeasurementofcyclicstrength,numberofcyclestoliquefactionorcyclicproperties(ModulusandDamping)ofsoils,afterone-dimensionalconsolidationusingacyclicmodeofloading.1.2Thecyclicshearingcanbeappliedusingloadcontrolordisplacementcontrol.Itshallbetheresponsibilityoftheagencyrequestingthistesttospecifythemagnitudeandfrequencyofthecyclicloading.Otherloadinghistoriesmaybeusedifrequiredbytheagencyrequestingthetesting.1.3Thistestmethodiswrittenspecificallyfordevicesthattestcylindricalspecimensenclosedinawire-reinforcedmem-braneorasoftmembranewithinastackofrigidrings(thistestmethodappliestoTefloncoatedrigidringsaswell).Othertypesofsheardevicesarebeyondthescopeofthistestmethod.1.4Thistestmethodcanbeusedfortestingcohesionlessfreedrainingsoilsorfinegrainedsoils.However,thistestmethodmaybefollowedwhentestingmostsoiltypesifcareistakentoensurethatanyspecialconsiderationsrequiredforsuchsoilsareaccountedfor.1.5Theshearingphaseofthistestisconductedunderconstantvolumeconditions.Sincethelateralconfinementsystempreventsradialspecimenstrains,theconstantvolumeconditionisaccomplishedbypreventingspecimenheightchangeduringshear.Shearingunderconstantvolumecanbeperformedondryorsaturatedspecimens.Theconstantvolumeconditionisequivalenttotheundrainedconditionforfullysaturatedspecimens.Cyclicdirectsimplesheartestingwithtrulyundrainedconditions(restrictingporewaterflowfromandintothespecimen)canbeperformedusingsomesimplesheardevices,butisbeyondthescopeofthisstandard.21.6Thecycli...
