Designation:D7830/D7830M−14StandardTestMethodforIn-PlaceDensity(UnitWeight)andWaterContentofSoilUsinganElectromagneticSoilDensityGauge1ThisstandardisissuedunderthefixeddesignationD7830/D7830M;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.1.Scope*1.1Thistestmethodcoverstheproceduresfordeterminingin-placepropertiesofnon-frozen,unboundsoilandsoilaggre-gatemixturessuchastotaldensity,gravimetricwatercontentandrelativecompactionbymeasuringtheintrinsicimpedanceofthecompactedsoil.1.1.1Themethodanddevicedescribedinthistestmethodareintendedforin-processqualitycontrolofearthworkproj-ects.Siteormaterialcharacterizationisnotanintendedresult.1.2Units—ThevaluesstatedineitherSIunitsorinch-poundunits[giveninbrackets]aretoberegardedseparatelyasstandard.Thevaluesstatedineachsystemmaynotbeexactequivalents;therefore,eachsystemshallbeusedindependentlyoftheother.Combiningvaluesfromthetwosystemsmayresultinnon-conformancewiththestandard.1.2.1Thegravitationalsystemofinch-poundunitsisusedwhendealingwithinch-poundunits.Inthissystem,thepound(lbf)representsaunitofforce(weight)whiletheunitformassisslugs.Therationalizedslugunitisnotgiveninthisstandard.1.2.2Intheengineeringprofession,itiscustomarypracticetouse,interchangeably,unitsrepresentingbothmassandforce,unlessdynamiccalculationsareinvolved.Thisimplicitlycombinestwoseparatesystemsofunits,thatis,theabsolutesystemandthegravimetricsystem.Itisundesirabletocombinetheuseoftwoseparatesystemswithinasinglestandard.Theuseofbalancesorscalesrecordingpoundsofmass(lbm),ortherecordingofdensityinlbm/ft3shouldnotberegardedasnonconformancewiththisstandard.1.3AllobservedandcalculatedvaluesshallconformtotheGuideforSignificantDigitsandRoundingestablishedinPracticeD6026.1.3.1Theproceduresusedtospecifyhowdataiscollected,recorded,andcalculatedinthisstanda...
