Designation:D5515−97(Reapproved2010)´1StandardTestMethodforDeterminationoftheSwellingPropertiesofBituminousCoalUsingaDilatometer1ThisstandardisissuedunderthefixeddesignationD5515;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.ε1NOTE—AddedresearchreportinformationtoSection14editoriallyinSeptember2010.INTRODUCTIONTheprincipleofthistestmethodisthatthefinalvolumeofcharobtainedattheconclusionofastandarddilatationtestisdependentonthemassofcoalinthecoalpencilandontheradiusoftheretorttube.Thistestmethodincorporatesaprocedurewhich:determinesthemassofair-driedcoalinthecoalpencil;providesameanstomeasuretheaverageretorttuberadii;andemploysameanstoreportcoalexpansiononanairdriedcoalweightbasis.OthertestmethodsusedtodeterminetheswellingpropertiesofbituminouscoalsincludetheRuhr(ISO8264)andAudibert-Arnu(ISO349)InternationalStandardOrganization(ISO)testmethods.HoweverthesetwoISOtestmethodsprovideconsistentlydifferentvaluesforpercentdilatationandpercentcontraction.PercentcontractionanddilatationvaluesobtainedusingtheAudibert-ArnutestmethodarehigherandlowerrespectivelythanthoseobtainedusingtheRuhrtestmethod.Thesedifferenceshavebeenattributedtotrimmingthelengthofthecoalpencilfromdifferentends.TheAudibert-ArnutestmethodspecifiesthatthewiderendofthecoalpencilbetrimmedwhiletheRuhrtestmethodspecifiesthatthenarrowerendofthecoalpencilbetrimmed.1.Scope1.1Thistestmethodspecifiesaprocedureforthemeasure-mentoftheswellingofbituminouscoalusingadilatometer.1.2Thetestmethodislimitedinapplicabilitytothosecoalswhichhaveafreeswellingindex≥1asdeterminedinaccor-dancewithTestMethodD720.1.3ThevaluesstatedinSIunits(IEEE/ASTMSI-10)aretoberegardedasstandard.1.4Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestabl...
