Designation:D6951/D6951M−09(Reapproved2015)StandardTestMethodforUseoftheDynamicConePenetrometerinShallowPavementApplications1ThisstandardisissuedunderthefixeddesignationD6951/D6951M;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.1.Scope1.1Thistestmethodcoversthemeasurementofthepen-etrationrateoftheDynamicConePenetrometerwithan8-kg[17.6-lb]hammer(8-kg[17.6-lb]DCP)throughundisturbedsoilorcompactedmaterials,orboth.ThepenetrationratemayberelatedtoinsitustrengthsuchasanestimatedinsituCBR(CaliforniaBearingRatio).Asoildensitymaybeestimated(Note1)ifthesoiltypeandmoisturecontentareknown.TheDCPdescribedinthistestmethodistypicallyusedforpavementapplications.1.2Thetestmethodprovidesforanoptional4.6-kg[10.1-lb]slidinghammerwhentheuseofthe8-kg[17.6-lb]slidingmassproducesexcessivepenetrationinsoftgroundconditions.1.3ThevaluesstatedineitherSIunitsorinch-poundunitsaretoberegardedseparatelyasstandard.Thevaluesstatedineachsystemmaynotbeexactequivalents;therefore,eachsystemshallbeusedindependentlyoftheother.Combiningvaluesfromthetwosystemsmayresultinnon-conformancewiththestandard.1.4Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappro-priatesafetyandhealthpracticesanddeterminetheapplica-bilityofregulatorylimitationspriortouse.2.Terminology2.1DefinitionsofTermsSpecifictoThisStandard:2.1.18-kg[17.6-lb]DCPdynamicconepenetrometerwithan8-kg[17.6-lb]hammer(seeFig.1)—adeviceusedtoassesstheinsitustrengthofundisturbedsoilorcompactedmaterials,orboth.2.1.2slidingattachment(seeFig.1)—anoptionaldeviceusedinreadingthedistancetheDCPtiphaspenetrated.Itmaybefastenedtotheanvilorlowerrodtohold/slidealongaseparatemeasuringrod,oritmaybefastenedtotheseparaterodandslidealongagraduateddriverod.3.SummaryofT...
