ASTM D5195-2008 采用核子法现场测定土壤及集料密度的标准试验方法(深层)

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【英文标准名称】:StandardTestMethodforDensityofSoilandRockIn-PlaceatDepthsBelowSurfacebyNuclearMethods
【原文标准名称】:采用核子法现场测定土壤及集料密度的标准试验方法(深层)
【标准号】:ASTMD5195-2008
【标准状态】:现行
【国别】:美国
【发布日期】:2008
【实施或试行日期】:
【发布单位】:美国材料与试验协会(US-ASTM)
【起草单位】:D18.08
【标准类型】:(TestMethod)
【标准水平】:()
【中文主题词】:
【英文主题词】:depthprobe;in-placedensity;insitudensity;nuclearmethods;Attenuation(ofgammaradiation);Calibration--soil/rockanalysisinstrumentation;Density--soil/rock/relatedmaterials;Depthprofiling;Gammaradiation--soil/rock;In-placedensity(of
【摘要】:Thistestmethodisusefulasarapid,nondestructivetechniqueforthecalculationofthein-placedensityofsoilandrockatdesireddepthsbelowthesurfaceasopposedtosurfacemeasurementsinaccordancewithTestMethodD6938.Thistestmethodisusefulforinformationalandresearchpurposes.ItshouldonlybeusedforqualitycontrolandacceptancetestingwhencorrelatedtootheracceptedmethodssuchasTestMethodD2937.Thenon-destructivenatureofthetestmethodallowsrepetitivemeasurementstobemadeatasingletestlocationforstatisticalanalysisandtomonitorchangesovertime.ThefundamentalassumptionsinherentinthistestmethodarethatComptonscatteringandphotoelectricabsorptionarethedominantinteractionsofthegammarayswiththematerialundertest.Note18212;Thequalityoftheresultproducedbythisstandardtestmethodisdependentonthecompetenceofthepersonnelperformingit,andthesuitabilityoftheequipmentandfacilitiesused.AgenciesthatmeetthecriteriaofPracticeD3740aregenerallyconsideredcapableofcompetentandobjectivetesting/sampling/inspection,andthelike.UsersofthistestmethodarecautionedthatcompliancewithPracticeD3740doesnotinitselfassurereliableresults.Reliableresultsdependonmanyfactors;PracticeD3740providesameansofevaluatingsomeofthosefactors.1.1Thistestmethodcoversthecalculationofthedensityofsoilandrockbytheattenuationofgammaradiation,wherethegammasourceandthegammadetectorareplacedatthedesireddepthinaboredholelinedbyanaccesstube.1.1.1ForlimitationsseeSection5onInterference.1.2Thedensity,inmassperunitvolumeofthematerialundertest,iscalculatedbycomparingthedetectedrateofgammaradiationwithpreviouslyestablishedcalibrationdata(seeAnnexA1).1.3Aprecisionstatementhasnotbeendevelopedforthisstandardatthistime.Therefore,thisstandardshouldnotbeusedforacceptanceorrejectionofamaterialforpurchasignpurposesunlesscorrelatedtootheracceptedASTMstandards.1.4ThevaluesstatedinSIunitsareregardedasthestandard.Theinch-poundunitsgiveninparenthesesareforinformationonlyandmaybeapproximate.1.5AllobservedandcalculatedvaluesshallconformtotheguideforsignificantdigitsandroundingestablishedinPracticeD6026.1.5.1Theproceduresusedtospecifyhowdataarecollected,recorded,andcalculatedinthisstandardareregardedastheindustrystandard.Inaddition,theyarerepresentativeofthesignificantdigitsthatshouldgenerallyberetained.Theproceduresuseddonotconsidermaterialvariation,purposeforobtainingthedata,specialpurposestudies,oranyconsiderationsfortheuserx2019;sobjectives;anditiscommonpracticetoincreaseorreducesignificantdigitsofreporteddatatobecommensuratewiththeseconsiderations.Itisbeyondthescopeofthisstandardtoconsidersignificantdigitsusedinanalysismethodsforengineeringdesign.1.6Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappropriatesafetyandhealthpracticesanddeterminetheapplicabilityofregulatorylimitationspriortouse.SpecificprecautionarystatementsaregiveninSection7,x201C;Hazards.x201D;
【中国标准分类号】:Q13
【国际标准分类号】:93_020
【页数】:5P.;A4
【正文语种】:英语