Designation:D1556/D1556M−15´1StandardTestMethodforDensityandUnitWeightofSoilinPlacebySand-ConeMethod1ThisstandardisissuedunderthefixeddesignationD1556/D1556M;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.ThisstandardhasbeenapprovedforusebyagenciesoftheU.S.DepartmentofDefense.ε1NOTE—Editoriallycorrected6.1.5inJanuary2016.1.Scope*1.1Thistestmethodmaybeusedtodeterminethein-placedensityandunitweightofsoilsusingasandconeapparatus.1.2Thistestmethodisapplicableforsoilswithoutappre-ciableamountsofrockorcoarsematerialsinexcessof11⁄2in.[38mm]indiameter.1.3Thistestmethodmayalsobeusedforthedeterminationofthein-placedensityandunitweightofintactorinsitusoils,providedthenaturalvoidorporeopeningsinthesoilaresmallenoughtopreventthesandusedinthetestfromenteringthevoids.Thesoilorothermaterialbeingtestedshouldhavesufficientcohesionorparticleattractiontomaintainstablesidesonasmallholeorexcavation,andbefirmenoughtowithstandtheminorpressuresexertedindiggingtheholeandplacingtheapparatusoverit,withoutdeformingorsloughing.1.4Thistestmethodisnotsuitablefororganic,saturated,orhighlyplasticsoilsthatwoulddeformorcompressduringtheexcavationofthetesthole.Thistestmethodmaynotbesuitableforsoilsconsistingofunboundgranularmaterialsthatwillnotmaintainstablesidesinthetesthole,soilscontainingappreciableamountsofcoarsemateriallargerthan11⁄2in.[38mm],andgranularsoilshavinghighvoidratios.1.5Whenmaterialstobetestedcontainappreciableamountsofparticleslargerthan11⁄2in.[38mm],orwhentestholevolumeslargerthan0.1ft3[2830cm3]arerequired,TestMethodD4914orD5030/D5030Misapplicable.1.6Units—Thevaluesstatedineitherinch-poundunitsorSIunits[presentedinbrackets]aretoberegardedseparatelyasstandard.Thevaluesstatedineachsystemmaynotbeexactequivalents;thereforeeachsystemshallbeusedindependentlyoftheother.Comb...
