Designation:D6913/D6913M−17StandardTestMethodsforParticle-SizeDistribution(Gradation)ofSoilsUsingSieveAnalysis1ThisstandardisissuedunderthefixeddesignationD6913/D6913M;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.INTRODUCTIONAlthoughthistestmethodhasbeenusedformanyyears,therearevasttestingvariationsduetosoiltypesandconditions.Thetestismorecomplicatedandcomplexthanwouldbeexpected.Multipleproceduresarebeingpresentedalongwithnewterminology.Althoughtheseproceduresarenotnew,theywillnowbedefinedandexplained.Someexamplesofthesenewtermsarecompositesieving,designatedseparatingsieveandsubspecimen.Thistestmethodoutlinesthemajorityofconditionsandproceduresbutdoesnotcovereveryconceivablevariationorcontingency.ThetableofcontentsintheScopesectionisaddedtoenabletheusertoeasilyfindaspecifictopicorrequirement.Onlysections/subsectionswithtitlesarepresented.Therefore,numberedsubsectionswillnotbecontinuousinsomecases,asindicatedintheScopesection.1.Scope1.1Soilsconsistofparticleswithvariousshapesandsizes.Thistestmethodisusedtoseparateparticlesintosizerangesandtodeterminequantitativelythemassofparticlesineachrange.Thesedataarecombinedtodeterminetheparticle-sizedistribution(gradation).Thistestmethodusesasquareopen-ingsievecriterionindeterminingthegradationofsoilbetweenthe3-in.(75-mm)andNo.200(75-µm)sieves.1.2Theterms,soilsandmaterial,areusedinterchangeablythroughoutthestandard.1.3Incaseswherethegradationofparticleslargerthan3in.(75mm)sieveisneeded,TestMethodD5519maybeused.1.4IncaseswherethegradationofparticlessmallerthanNo.200(75-µm)sieveisneeded,TestMethodD7928maybeused.1.5Typically,ifthemaximumparticlesizeisequaltoorlessthan4.75mm(No.4sieve),thensingle-setsievingisapplicable.Furthermore,ifthemaximumparticlesizeisgreaterthan4.75mm(No.4sieve)andequaltoorlessthan9.5mm(3⁄8-ins...
