Designation:D5080−20StandardTestMethodforRapidDeterminationofPercentCompaction1ThisstandardisissuedunderthefixeddesignationD5080;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.1.Scope*1.1Thistestmethoddescribestheprocedureforrapidlydeterminingthepercentcompactionandthevariationfromoptimumwatercontentofanin-placesoilforuseincontrollingconstructionofcompactedearth.Thesevaluesareobtainedbydevelopingathree-pointcompactioncurveatthesamewatercontentasthein-placesoilwithoutknowingthevalueofthewatercontent.Thesoilusedforthecompactioncurveisnormallythesamesoilremovedfromthein-placedensitytest.Fortheremainderofthisdesignation,thistestmethodwillbereferredtoastherapidmethod.1.2Thistestmethodisnormallyperformedforsoilscon-tainingmorethan15%fines(minus75-µm(No.200)sievesize).1.3Whengravel-sizeparticlesarepresentinthesoilbeingtested,thistestmethodislimitedtoacomparisonoftheminus4.75-mm(No.4)sieve-sizefractionofthein-placedensitymaterialtoalaboratorycompactiontestofminus4.75-mm(No.4)sieve-sizematerial(MethodAofTestMethodsD698).SubjecttothelimitationsofPracticeD4718/D4718M,thistestmethodisalsoapplicabletocomparisonsofothersieve-sizefractions(forexample,MethodCofTestMethodsD698)orothercompactiveefforts(forexample,TestMethodsD1557)ifnewwatercontentadjustmentvaluesaredetermined(see6.1andAppendixX2).1.4Units—ThevaluesstatedinSIunitsaretoberegardedasstandard.ReportingoftestresultsinunitsotherthanSIshallnotberegardedasnonconformancewiththisstandard.1.4.1Theuseofbalancesorscalesrecordingpoundsofmass(lbm),ortherecordingofdensityinpoundsofmasspercubicfoot(lbm/ft3)shouldnotberegardedasnonconformancewiththistestmethod.1.4.2Thesievedesignationsareidentifiedusingthe“stan-dard”systeminaccordancewithSpecificationE11,suchas25-mmand75-µm,followedbythe“alternative”systemof1-in.andNo....
