ASTM_D_5334_-_22a.pdf

Designation:D533422aStandard Test Method forDetermination of Thermal Conductivity of Soil and Rock byThermal Needle Probe Procedure1This standard is issued under the fixed designation D5334;the number immediately following the designation indicates the year oforiginal adoption or,in the case of revision,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 presents a procedure for determiningthe thermal conductivity()of soil and rock using a transientheat method.This test method is applicable for both intactspecimens of soil and rock and reconstituted soil specimens,and is effective in the lab and in the field.This test method ismost suitable for homogeneous materials,but can also give arepresentative average value for non-homogeneous materials.1.2 This test method is applicable to dry,unsaturated orsaturated materials that can sustain a hole for the sensor.It isvalid over temperatures ranging from 100C,dependingon the suitability of the thermal needle probe construction totemperature extremes.However,care must be taken to preventsignificant error from:(1)redistribution of water due to thermalgradients resulting from heating of the needle probe;(2)redistribution of water due to hydraulic gradients(gravitydrainage for high degrees of saturation or surface evaporation);(3)phase change of water in specimens with temperatures near0C or 100C.1.3 UnitsThe values stated in SI units are to be regardedas the standard.No other units of measurements are included inthis standard.Reporting of test results in units other than SIshall not be 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 or calculated in this standard are regarded as theindustry standard.In addition,they are representative of thesignificant digits that generally should be retained.The proce-dures 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 standard to consider significant digits used in analyticalmethods for engineering design.NOTE1This test method is also applicable and commonly used fordetermining thermal conductivity of a variety of engineered porousmaterials of geologic origin including concrete,Fluidized Thermal Back-fill(FTB),and thermal grout.1.5 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,health,and environmental practices and deter-mine the applicability of regulatory limitations prior to use.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 to Trade(TBT)Committee.2.Referenced Documents2.1 ASTM Standards:2D653 Terminology Relating to Soil,Rock,and ContainedFluidsD2216 Test Methods for Laboratory Determination of Water(Moisture)Content of Soil and Rock by MassD3740 Practice for Minimum Requirements for AgenciesEngaged in Testing and/or Inspection of Soil and Rock asUsed in Engineering Design and ConstructionD4753 Guide for Evaluating,Selecting,and Specifying Bal-ances and Standard Masses for Use in Soil,Rock,andConstruction Materials TestingD6026 Practice for Using Significant Digits and Data Re-cords in Geotechnical Data3.Terminology3.1 DefinitionsFor definitions of common technical termsused in this standard,refer to Terminology D653.3.2 Definitions of Terms Specific to This Standard:1This test method is under the jurisdiction ofASTM Committee D18 on Soil andRock and is the direct responsibility of Subcommittee D18.12 on Rock Mechanics.Current edition approved Oct.1,2022.Published October 2022.Originallyapproved in 1992.Last previous edition approved in 2022 as D5334 22.DOI:10.1520/D5334-22A.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 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 StatesThis international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for theDevelopment