1、Designation:D522014Standard Test Method forWater Mass per Unit Volume of Soil and Rock In-Place bythe Neutron Depth Probe Method1This standard is issued under the fixed designation D5220;the number immediately following the designation indicates the year oforiginal adoption or,in the case of revisio
2、n,the year of last revision.A number in parentheses indicates the year of last reapproval.Asuperscript epsilon()indicates an editorial change since the last revision or reapproval.1.Scope*1.1 This test method covers the calculation of the watermass per unit volume of soil and rock by thermalization
3、orslowing of fast neutrons where the neutron source and thethermal neutron detector are placed at the desired depth in thebored hole lined by an access tube.1.1.1 For limitations see Section 6 on Interferences.1.2 The water mass per unit volume,expressed as mass perunit volume of the material under
4、test,is calculated bycomparing the thermal neutron count rate with previouslyestablished calibration data(see Annex A1).1.3 A precision statement has not been developed for thisstandard at this time.Therefore,this standard should not beused for acceptance or rejection of a material for purchasingpur
5、poses unless correlated to other accepted ASTM methods.1.4 UnitsThe values expressed in SI units are regarded asthe standard.The inch-pound units given in parentheses maybe approximate and are provided for information only.1.5 All observed and calculated values shall conform to theguide for signific
6、ant digits and rounding established in PracticeD6026.1.5.1 The procedures used to specify how data are collected,recorded,and calculated in this standard are regarded as theindustry standard.In addition,they are representative of thesignificant digits that should generally be retained.The proce-dure
7、s used do not consider material variation,purpose forobtaining the data,special purpose studies,or any consider-ations for the users objectives;and it is common practice toincrease or reduce significant digits of reported data to becommensurate with these considerations.It is beyond the scopeof this
8、 standard to consider significant digits used in analysismethods for engineering design.1.6 This standard does not purport to address all of thesafety concerns,if any,associated with its use.It is theresponsibility of the user of this standard to establish appro-priate safety and health practices an
9、d determine the applica-bility of regulatory limitations prior to use.Specific hazards aregiven in Section 8.2.Referenced Documents2.1 ASTM Standards:2D653 Terminology Relating to Soil,Rock,and ContainedFluidsD1452 Practice for Soil Exploration and Sampling by AugerBoringsD1586 Test Method for Penet
10、ration Test(SPT)and Split-Barrel Sampling of SoilsD1587 Practice for Thin-Walled Tube Sampling of Soils forGeotechnical PurposesD2113 Practice for Rock Core Drilling and Sampling ofRock for Site ExplorationD2216 Test Methods for Laboratory Determination of Water(Moisture)Content of Soil and Rock by
11、MassD2937 Test Method for Density of Soil in Place by theDrive-Cylinder MethodD3550 Practice for Thick Wall,Ring-Lined,Split Barrel,Drive Sampling of SoilsD3740 Practice for Minimum Requirements for AgenciesEngaged in Testing and/or Inspection of Soil and Rock asUsed in Engineering Design and Constr
12、uctionD4428/D4428M Test Methods for Crosshole Seismic Test-ingD5195 Test Method for Density of Soil and Rock In-Place atDepths Below Surface by Nuclear MethodsD6026 Practice for Using Significant Digits in GeotechnicalDataD6938 Test Method for In-Place Density and Water Contentof Soil and Soil-Aggre
13、gate by Nuclear Methods(ShallowDepth)3.Terminology3.1 DefinitionsFor definitions of common technical termsin this standard,refer to Terminology D653.1This test method is under the jurisdiction ofASTM Committee D18 on Soil andRock and is the direct responsibility of Subcommittee D18.08 on Special and
14、Construction Control Tests.Current edition approved June 15,2014.Published June 2014.Originallyapproved in 1992.Last previous edition approved in 2008 as D5220 08.DOI:10.1520/D5220-14.2For referenced ASTM standards,visit the ASTM website,www.astm.org,orcontact ASTM Customer Service at serviceastm.or
15、g.For Annual Book of ASTMStandards volume information,refer to the standards Document Summary page onthe ASTM website.*A Summary of Changes section appears at the end of this standardCopyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959.United States1 3.2 Def
16、initions of Terms Specific to This Standard:3.2.1 detectora device to observe and measure radiation.3.2.2 dry densitysame as density of dry soil or rock(asdefined in Terminology D653);the mass of solid particles perthe total volume of soil or rock.3.2.3 neutron probea cylindrical device containing a fastneutron source and a thermal neutron detector.3.2.4 neutron(radiation)sourcea sealed radioactive ma-terial that emits neutron radiation as it decays.3.2.5 thermalizationthe process of“slowing dow
