Designation:D8081−17(Reapproved2021)´1StandardGuideforTheoryandPrinciplesforObtainingReliableandAccurateBulkSolidsFlowDataUsingaDirectShearCell1ThisstandardisissuedunderthefixeddesignationD8081;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.ε1NOTE—ReapprovedwitheditorialchangesinNovember2021.1.Scope*1.1Thisguidecoverstheoryandprinciplesforobtainingreliableandaccuratebulksolidsflowdatausingadirectshearcell.Itincludescharacteristicsandlimitationsofthethreemostpopulardirectshearcelltypes:Translational(D6128),Annular(D6773),andRotational(D6682andD7891).1.2Units—ThevaluesstatedinSIunitsaretoberegardedasstandard.Nootherunitsofmeasureareincludedinthisstandard.1.3Thisguideoffersanorganizedcollectionofinformationoraseriesofoptionsanddoesnotrecommendaspecificcourseofaction.Thisdocumentcannotreplaceeducationorexperi-enceandshouldbeusedinconjunctionwithprofessionaljudgment.Notallaspectsofthisguidemaybeapplicableinallcircumstances.ThisASTMstandardisnotintendedtorepre-sentorreplacethestandardofcarebywhichtheadequacyofagivenprofessionalservicemustbejudged,norshouldthisdocumentbeappliedwithoutconsiderationofaproject’smanyuniqueaspects.Theword“Standard”inthetitleofthisdocumentmeansonlythatthedocumenthasbeenapprovedthroughtheASTMconsensusprocess.1.4Thisguideoffersanorganizedcollectionofinformationoraseriesofoptionsanddoesnotrecommendaspecificcourseofaction.Thisdocumentcannotreplaceeducationorexperienceandshouldbeusedinconjunctionwithprofessionaljudgment.Notallaspectsofthisguidemaybeapplicableinallcircumstances.ThisASTMstandardisnotintendedtorepre-sentorreplacethestandardofcarebywhichtheadequacyofagivenprofessionalservicemustbejudged,norshouldthisdocumentbeappliedwithoutconsiderationofaproject’smanyuniqueaspects.Theword“Standard”inthetitleofthisdocumentmeansonlytha...
