=900927bO020102bL?Designation:D311-844Ib,WERICANSOCIETYFORTESTINGANDMATERIALS1916RatoSt.,Phikddphb.Pa.19103ReprintedfromtheAnnualBookofAmses.CopyrmtASlNIfnotlistedinthecurrentcombinadindex,willwrinthenextdition,StandardMethodforSIEVEANALYSISOFCRUSHEDBITUMINOUSCOAL'ThisstandardisissuedunderthefixeddesignationO311;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision.theyearofiaslrevision.Anumberinparenthesesindicaetheyearoflastreapproval.Asuperscriptepsilon(t)indicatesaneditonalchangesincethelasteviuonorreapproval.1.Scope1.1Thismethodcoversthesieveanalysisofrathercoarselycrushedbituminouscoal,lessthan1'12in.(37.5mm)insize,suchasischargedintocokeovens.Itisnotapplicabletothetestingofpowderedcoalasusedinboilerplants.i.2Thevaluesstatedininch-poundunitsaretoberegardedasthestandard.i.3Thisstandardmayinvolvehazardousma-terials,operations,andequipment.Thisstandarddoesnotpurporttoaddressallofthesafelyproblemsassociatedwithitsuse.Itistheresponsibil-ityqfwhoeverusesihisstandardtoconsultandestablishuppropriaresafityandhealihpracticesanddcierrnineihrapplicabilityofregulalorylirni-tationspriortouse.2.ApplicableDocuments2.1ASTMSrandards:D346MethodofCollectionandPreparation19.0mm26.5mm0.7501.o64.2Sievesofdouble-crïmpedwirewithcircu-larframesabout18in.(457mm)indiameteraresatisfactory.5.CollectionofGross-pie5.2Forcollectinggrossamplesofcrushedbituminouscoal,theproceduredescribedinMethodD4IOshallapply.6.PreparationofLaboratorySample6.1Thegrosssampleofcoalshallbethor-oughlymixedandreducedbyquartering,with-outcrushing,toalaboratorysampleofapproxi-mately60ib(27kg)inaccordancewithMethodD346andMethodD410.Incasethecoaliswet,airdrythegrosssamplebeforeredpctiontothe60-lblaboratorysample.ofCokeSamplesforLaboratoryAnalysis'D41OMethodofSieveAnalysisofCoal2E11SpecificationforWire-ClothSievesfor7.Procedure7.1Accuratelyweighthelaboratorysample(approximately60Ib(27kg)).startingwiththesievehavingthelargestopening,sievethelabo-ratorysampleofcoalinsuchin...
