1、Designation:D5220/D5220M21Standard 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/D5220M;the number immediately following the designation indicates theyear of original adoption or,in the c
2、ase of revision,the year of last revision.A number in parentheses indicates the year of lastreapproval.A superscript epsilon()indicates an editorial change since the last revision or reapproval.1.Scope*1.1 This test method covers the measurement of the watermass per unit volume of soil and rock by t
3、hermalization 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 m
4、aterial under test,is determined bycomparing the thermal neutron count rate with previouslyestablished calibration data(see Annex A1).1.3 UnitsThe values stated in either SI units or inch-pound units are to be regarded separately as standard.Thevalues stated in each system are not necessarily exact
5、equiva-lents;therefore,to ensure conformance with the standard,eachsystem shall be used independently of the other,and valuesfrom the two systems shall not be combined.Within the text ofthis standard,SI units appear first followed by the inch-pound(or other non-SI)units in brackets.1.3.1 Reporting o
6、f test results in units other than SI shall notbe regarded as nonconformance with this standard.1.4 All observed and calculated values shall conform to theguidelines for significant digits and rounding established inPractice D6026.1.4.1 The procedures used to specify how data are collected,recorded,
7、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-dures used do not consider material variation,purpose forobtaining the data,special purpose studies,or any consider-ations for
8、 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 standard to consider significant digits used in analysismethods for engineering design.1.5 This standard does not purport
9、 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,health,and environmental practices and deter-mine the applicability of regulatory limitations prior to use.Specific hazards are given in Section
10、8.1.6 This international standard was developed in accor-dance with internationally recognized principles on standard-ization established in the Decision on Principles for theDevelopment of International Standards,Guides and Recom-mendations issued by the World Trade Organization TechnicalBarriers t
11、o Trade(TBT)Committee.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 Standard Penetration Test(SPT)andSplit-Barrel Sampling of SoilsD1587 Practice for Thin-Walle
12、d Tube Sampling of Fine-Grained Soils for Geotechnical 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 MassD2937 Test Method for Density of Soil in Place by theDrive-Cy
13、linder MethodD3740 Practice for Minimum Requirements for AgenciesEngaged in Testing and/or Inspection of Soil and Rock asUsed in Engineering Design and ConstructionD4428/D4428M Test Methods for Crosshole Seismic Test-ingD5195 Test Method for Density of Soil and Rock In-Place atDepths Below Surface b
14、y Nuclear MethodsD6026 Practice for Using Significant Digits in GeotechnicalData1This test method is under the jurisdiction ofASTM Committee D18 on Soil andRock and is the direct responsibility of Subcommittee D18.08 on Special andConstruction Control Tests.Current edition approved May 1,2021.Publis
15、hed May 2021.Originallyapproved in 1992.Last previous edition approved in 2014 as D5220 14.DOI:10.1520/D5220_D5220M-21.2For referenced ASTM standards,visit the ASTM website,www.astm.org,orcontact ASTM Customer Service at serviceastm.org.For Annual Book of ASTMStandards volume information,refer to th
16、e 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 StatesThis international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for theDevelopment of International Standards,Guides and Recommendations issued by the World Trade Organization Te
