1、Designation:D668314Standard Test Method forMeasuring Bulk Density Values of Powders and Other BulkSolids as Function of Compressive Stress1This standard is issued under the fixed designation D6683;the number immediately following the designation indicates the year oforiginal adoption or,in the case
2、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 procedure fordetermining a range of bulk densities of pow
3、ders and otherbulk solids as a function of compressive stress.1.2 This test method should be performed in the laboratoryunder controlled conditions of temperature and humidity.1.3 All observed and calculated values shall conform to theguidelines for significant digits and rounding established inPrac
4、tice D6026.1.3.1 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,p
5、urpose 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 us
6、ed in analysismethods for engineering design.1.4 UnitsThe values stated in SI units are to be regardedas standard.No other units of measure are included in thisstandard.1.5 This standard does not purport to address all of thesafety concerns,if any,associated with its use.It is theresponsibility of t
7、he 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:2D653 Terminology Relating to Soil,Rock,and ContainedFluidsD2216 Test Methods for Laboratory Determination o
8、f 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,Ro
9、ck,andConstruction Materials TestingD6026 Practice for Using Significant Digits in GeotechnicalData3.Terminology3.1 DefinitionsFor common definitions of terms in thisstandard,refer to Terminology D653.3.2 Definitions of Terms Specific to This Standard:3.2.1 maximum effective head,nin powders,height
10、of acolumn of material that has no shear stresses along its verticalwalls.Used in calculation of maximum applied mass,thisvalue can be approximated,for example,by using the height ofthe cylindrical section of the bin to be analyzed,m.3.3 Symbols:3.3.1 Acupinside cross-sectional area of density cup,m
11、2.3.3.2 AMmaxcalculated value of maximum applied mass,kg.3.3.3 Dcupinside diameter of density cup,m.3.3.4 EHmaxmaximum effective head to be applied tomaterial in density cup,m.3.3.5 Mmatlmass of material in density cup,kg.3.3.6 Vicalculated volume of material in density cup at ithconsolidation step,
12、m3.3.3.7(b)approxapproximate value of materials bulk den-sity used in calculation of maximum applied mass,kg/m3.3.3.8(b)icalculated bulk density value at ithconsolida-tion step,kg/m3.3.3.9(b)initialcalculated initial bulk density value,kg/m3.3.3.10 icalculated compressive stress at ithconsolidations
13、tep,N/m2.1This 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 1,2014.Published June 2014.Originallyapproved in 2001.Last previou
14、s edition approved in 2008 as D6683 08.DOI:10.1520/D6683-14.2For 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 Sum
15、mary 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 3.3.11 maxmaximum compressive stress to be applied tomaterial in density cup,N/m2.4.Summary of Test Method4.1 Bulk density values a
16、re determined by calculating thevolume of a given mass of bulk solid under increasingcompressive stress.5.Significance and Use5.1 The data from this test can be used to estimate the bulkdensity of materials in bins and hoppers and for materialhandling applications such as feeders.5.2 The test results can be greatly affected by the sampleselected for testing.For meaningful results it is necessary toselect a representative sample of the particulate solid withrespect to moisture(water)content,parti