ASTM_D_6393_-_D_6393M_-_21.pdf

Designation:D6393/D6393M21Standard Test Method forBulk Solids Characterization by Carr Indices1This standard is issued under the fixed designation D6393/D6393M;the number immediately following the designation indicates theyear of original adoption or,in the case 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 an apparatus and procedures formeasuring properties of bulk solids,henceforth referred to asCarr Indices.21.2 This test method is suitable for free flowing and mod-erately cohesive powders and granular materials up to 2.0 mm116in.in size.Materials must be able to pour through a 6.0to 8.0-mm 14to516in.diameter funnel outlet when in anaerated state.1.3 This method consists of eight measurements and twocalculations for Carr Indices as follows.Each measurement,orcalculation,or combination of them,can be used to character-ize the properties of bulk solids.1.3.1 Measurement of Carr Angle of Repose1.3.2 Measurement of Carr Angle of Fall1.3.3 Calculation of Carr Angle of Difference1.3.4 Measurement of Carr Loose Bulk Density1.3.5 Measurement of Carr Packed Bulk Density1.3.6 Calculation of Carr Compressibility1.3.7 Measurement of Carr Cohesion1.3.8 Measurement of Carr Uniformity1.3.9 Measurement of Carr Angle of Spatula1.3.10 Measurement of Carr Dispersibility1.4 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 analysismethods for engineering design.1.5 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 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.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,health,and environmental practices and deter-mine the applicability of regulatory limitations prior to use.1.7 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:3D653 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 ConstructionD6026 Practice for Using Significant Digits in GeotechnicalDataE11 Specification for Woven Wire Test Sieve Cloth and TestSieves3.Terminology3.1 Definitions of Terms:3.1.1 For definitions of common technical terms in thisstandard,refer to Terminology D653.1This test method is under the jurisdiction ofASTM Committee D18 on Soil andRock and is the direct responsibility of Subcommittee D18.24 on Characterizationand Handling of Powders and Bulk Solids.Current edition approved May 1,2021.Published May 2021.Originallyapproved in 1999.Last previous edition approved in 2014 as D6393 14.DOI:10.1520/D6393_D6393M-21.2Carr,R.L.,“Evaluating Flow Properties of Solids,”Chemical Engineering,January 18,1965,pp.163168.3For 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 of International Standards,Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade(TBT)Committee.13.2 Definitions of Terms Specific to This Stand