Designation:D5874−02(Reapproved2007)StandardTestMethodforDeterminationoftheImpactValue(IV)ofaSoil1ThisstandardisissuedunderthefixeddesignationD5874;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.1.Scope*1.1ThistestmethodcoversthedeterminationoftheImpactValue(IV)ofasoileitherinthefieldoratestmold.1.2Thestandardtestmethod,usinga4.5kg(10lbm)hammer,issuitablefor,butnotlimitedto,evaluatingthestrengthofanunsaturatedcompactedfill,inparticularpave-mentmaterials,soils,andsoil-aggregateshavingmaximumparticlesizeslessthan37.5mm(1.5in.).1.3Byusingalighter0.5kg(1.1lbm)hammer,thistestmethodisapplicableforevaluatinglowerstrengthsoilssuchasfinegrainedcohesionless,highlyorganic,saturated,orhighlyplasticsoilshavingamaximumparticlesizelessthan9.5mm(0.375in.).1.4Byperforminglaboratorytestcorrelationsforaparticu-larsoilusingthe4.5kg(10lbm)hammer,IVmaybecorrelatedwithanunsoakedCaliforniaBearingRatio(CBR)ormaybeusedtoinferpercentagecompaction.1.5ThevaluesstatedSIaretoberegardedasthestandard.Thevaluesstatedinparenthesesaregivenforinformationonly.1.6AllobservedandcalculatedvaluesshallconformtotheguidelinesforsignificantdigitsandroundingestablishedinPracticeD6026.Themethodusedtospecifyhowdataarecollected,calculated,orrecordedinthisstandardisnotdirectlyrelatedtotheaccuracytowhichthedatacanbeappliedindesignorotherusesorboth.Howoneappliestheresultsobtainedusingthisstandardisbeyonditsscope.1.7Thisstandardmayinvolvehazardousmaterials,operations,andequipment.Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappropriatesafetyandhealthpracticesanddeter-minetheapplicabilityofregulatorylimitationspriortouse.NOTE1—TheequipmentandprocedurescontainedinthistestmethodaresimilartothosedevelopedbyB.Clegginthe...
