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1、Designation:D5220?14StardTestMethodfWaterMassperUnitVolumeofSoilRockInPlacebytheNeutronDepthProbeMethod1ThisstardisissuedunderthefixeddesignationD5220thenumberimmediatelyfollowingthedesignationindicatestheyearofiginalado

2、ptioninthecaseofrevisiontheyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperepsilon()indicatesaneditialchangesincethelastrevisionreapproval.1.Scope1.1Thistestmethodcoversthecalculationofthewa

3、termassperunitvolumeofsoilrockbythermalizationslowingoffastneutronswheretheneutronsourcethethermalneutrondetectareplacedatthedesireddepthinthebedholelinedbyanaccesstube.1.1.1FlimitationsseeSection6onInterferences.1.2Thew

4、atermassperunitvolumeexpressedasmassperunitvolumeofthematerialundertestiscalculatedbycomparingthethermalneutroncountratewithpreviouslyestablishedcalibrationdata(seeAnnexA1).1.3Aprecisionstatementhasnotbeendevelopedfthiss

5、tardatthistime.TherefethisstardshouldnotbeusedfacceptancerejectionofamaterialfpurchasingpurposesunlesscrelatedtootheracceptedASTMmethods.1.4Units—ThevaluesexpressedinSIunitsareregardedasthestard.Theinchpoundunitsgiveninp

6、arenthesesmaybeapproximateareprovidedfinfmationonly.1.5AllobservedcalculatedvaluesshallconfmtotheguidefsignificantdigitsroundingestablishedinPracticeD6026.1.5.1Theproceduresusedtospecifyhowdataarecollectedrecdedcalculate

7、dinthisstardareregardedastheindustrystard.Inadditiontheyarerepresentativeofthesignificantdigitsthatshouldgenerallyberetained.Theproceduresuseddonotconsidermaterialvariationpurposefobtainingthedataspecialpurposestudiesany

8、considerationsftheuser’sobjectivesitiscommonpracticetoincreasereducesignificantdigitsofrepteddatatobecommensuratewiththeseconsiderations.Itisbeyondthescopeofthisstardtoconsidersignificantdigitsusedinanalysismethodsfengin

9、eeringdesign.1.6Thisstarddoesnotpurpttoaddressallofthesafetyconcernsifanyassociatedwithitsuse.Itistheresponsibilityoftheuserofthisstardtoestablishappropriatesafetyhealthpracticesdeterminetheapplicabilityofregulatylimitat

10、ionspritouse.SpecifichazardsaregiveninSection8.2.ReferencedDocuments2.1ASTMStards:2D653TerminologyRelatingtoSoilRockContainedFluidsD1452PracticefSoilExplationSamplingbyAugerBingsD1586TestMethodfPerationTest(SPT)SplitBarr

11、elSamplingofSoilsD1587PracticefThinWalledTubeSamplingofSoilsfGeotechnicalPurposesD2113PracticefRockCeDrillingSamplingofRockfSiteExplationD2216TestMethodsfLabatyDeterminationofWater(Moisture)ContentofSoilRockbyMassD2937Te

12、stMethodfDensityofSoilinPlacebytheDriveCylinderMethodD3550PracticefThickWallRingLinedSplitBarrelDriveSamplingofSoilsD3740PracticefMinimumRequirementsfAgenciesEngagedinTestingInspectionofSoilRockasUsedinEngineeringDesignC

13、onstructionD4428D4428MTestMethodsfCrossholeSeismicTestingD5195TestMethodfDensityofSoilRockInPlaceatDepthsBelowSurfacebyNuclearMethodsD6026PracticefUsingSignificantDigitsinGeotechnicalDataD6938TestMethodfInPlaceDensityWat

14、erContentofSoilSoilAggregatebyNuclearMethods(ShallowDepth)3.Terminology3.1Definitions—FdefinitionsofcommontechnicaltermsinthisstardrefertoTerminologyD653.1ThistestmethodisunderthejurisdictionofASTMCommitteeD18onSoilRocki

15、sthedirectresponsibilityofSubcommitteeD18.08onSpecialConstructionControlTests.CurrenteditionapprovedJune152014.PublishedJune2014.iginallyapprovedin1992.Lastpreviouseditionapprovedin2008asD5220–08.DOI:10.1520D522014.2Fref

16、erencedASTMstardsvisittheASTMwebsitewww.astm.gcontactASTMCustomerServiceat.FAnnualBookofASTMStardsvolumeinfmationrefertothestard’sDocumentSummarypageontheASTMwebsite.ASummaryofChangessectionappearsattheendofthisstardCopy

17、right?ASTMInternational100BarrHarbDrivePOBoxC700WestConshohockenPA194282959.UnitedStates1requiredthetubingshallbeofamaterialsuchasaluminumsteelpolyvinylchlidehavinganinteridiameterlargeenoughtopermitprobeaccesswithoutbin

18、ding.Thetubingshallbeasthinwalledaspossibletoprovidecloseproximityoftheprobetothematerialundertest.Thesametypeoftubingshallbeusedinthefieldasisusedincalibration.7.5.2DrillingTool(s)—Haugerpowerdrillingequipmentthatcanbeu

19、sedtoestablishtheaccesshole.Anydrillingequipmentthatprovidesasuitablecleanopenholefinstallationofaccesstubingionoftheprobeshallbeacceptable.Theequipmentusedshallbecapableofmaintainingconstantbeholediametertoensurethatthe

20、measurementsareperfmedonundisturbedsoilrock.Thetypeofequipmentmethodsofadvancingtheaccessholeshouldberepted.7.5.3DummyProbe—Acylindricalprobethesamesizeastheprobecontainingtheneutronsourceachaincableofsufficientdesignlen

21、gthtopermitloweringthedummyprobedownthecasedholetodesiredtestdepths.8.Hazards8.1Theseinstrumentsutilizeradioactivematerialsthatmaybehazardoustothehealthoftheusersunlessproperprecautionsaretaken.Usersoftheseinstrumentsmus

22、tbecomefamiliarwithapplicablesafetyproceduresgovernmentregulations.8.2EffectiveuserinstructionstogetherwithroutinesafetyproceduresknowledgeofcompliancewithRegulatyRequirementsareamatypartoftheoperationstageoftheseinstrum

23、ents.9.CalibrationStardizationReferenceCheck9.1CalibratetheinstrumentinaccdancewithAnnexA1.9.2AdjustthecalibrationinaccdancewithAnnexA2ifadjustmentsarenecessary.9.3StardizationReferenceCheck:9.3.1Nucleardensitygaugesares

24、ubjecttolongtermagingoftheradioactivesourceswhichmaychangetherelationshipbetweencountratesthematerialdensity.Tocrectfthisagingeffectgaugesarecalibratedasaratioofthemeasurementcountratetoacountratemadeonareferencestard.9.

25、3.2Stardizationofthegaugeshallbeperfmedatthestartofeachday’susearecdofthesedatashouldberetainedftheamountoftimerequiredtoensurecompliancewitheitherSection9.3.49.3.5whicheverisapplicable.Perfmthestardizationwiththegaugefa

26、renoughawayfromotherapparatuscontainingradioactivesourcestopreventinterferenceduetoradiationfromtheotherapparatus.Inadditionperfmthestardizationfarenoughawayfromlargemassesotheritemswhichcanaffectthereferencecountratesdu

27、etoreflectionsfromthesemassesitems.NOTE2—Separationofnucleargaugesbyadistanceof9m(30ft)fromoneanotherhastypicallyprovensufficientinpreventingradiationfromonegaugefrombeingdetectedbyanothergaugepotentiallycausinganincrect

28、stardizationcount.Thisseparationcanbereducedbytheproperuseofshielding.Withregardstoreflectionsfromlargemassesotheritemspotentiallycausingincrectstardizationcountsaseparationof1m(3ft)betweenthegaugethemassiteminquestionha

29、stypicallyprovensufficienttopreventsuchreflectionsfrominfluencingthestardizationcounts.9.3.3Turnonthegaugeallowfstabilizationaccdingtothemanufacturer’srecommendations.9.3.4Usingthereferencestardtakeatleastfourrepetitiver

30、eadingsatthenmalmeasurementperiodobtainthemean.Ifavailableonthegaugeonemeasurementatfourmetimesthenmalmeasurementperiodisacceptable.Thisconstitutesonestardizationcheck.Usetheprocedurerecommendedbythegaugemanufacturertoes

31、tablishthecomplianceofthestardmeasurementtotheacceptedrange.Withoutspecificrecommendationsfromthegaugemanufacturerusetheprocedurein9.3.5.9.3.5IfthevalueofthecurrentstardizationcountisoutsidethelimitssetbyEq1repeatthestar

32、dizationcheck.IfthesecondstardizationchecksatisfiesEq1thegaugeisconsideredinsatisfactyoperatingcondition.0.98Nce2ln~2!tT12#N0#1.02Nce2ln~2!tT12(1)where:T12=thehalflifeoftheisotopethatisusedfthedensitymoisturedeterminatio

33、ninthegauge.Fexample241Am:BetheisotopemostcommonlyusedfdensitydeterminationinthesegaugesT12is157788daysNc=thestardizationcountacquiredatthetimeofthelastcalibrationverificationN0=thecurrentstardizationcountFIG.1SchematicD

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