ASTM_D_6393_-_14.pdf

Designation:D639314Standard Test Method forBulk Solids Characterization by Carr Indices1This standard is issued under the fixed designation D6393;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 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 mmin size.Materials must be able to pour through a 6.0 to 8.0-mmdiameter funnel outlet when in an aerated 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 SI units are to be regardedas standard.No other units of measurement are included in thisstandard.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 and determine the applica-bility of regulatory limitations prior to use.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 GeotechnicalData3.Terminology3.1 Definitions of Terms:3.1.1 For common definitions of terms in this test method,refer to Terminology D653.4.Summary of Test Method4.1 Carr Angle of Repose is determined by dropping thepowder specimen through a vibrating sieve and funnel above ahorizontal circular platform and measuring the angle of powdercone in relation to the edge of the circular platform.4.2 CarrAngle of Fall is determined by measuring the angleof powder cone in relation to the edge of a circular platformafter applying shock impacts to the powder cone.The mea-surement is performed after completing the measurement ofCarr Angle of Repose.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 Nov.1,2014.Published November 2014.Originallyapproved in 1999.Last previous edition approved in 2008 as D6393 08.DOI:10.1520/D6393-14.2Carr,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 States1 4.3 Carr Angle of Difference is calculated by subtractingCarr Angle of Fall from Carr Angle of Repose.4.4 Carr Loose Bulk Density is determined by sievingpowder specimen through a vibrating chute to fill a measuringcup and calculating the mass of loose powder in a givenvolume.4.5 Carr Packed Bulk Density is determined by dropping ameasuring cup filled with powder specimen for a specificnumber of times from the same height and calculating the massof packed powder in a given volume.4.6 Carr