Designation:D8187−18StandardGuideforInterpretationofStandardHumidityCellTestResults1ThisstandardisissuedunderthefixeddesignationD8187;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.1.Scope1.1Thiskinetictestguidecoversinterpretationandcoop-erativemanagementofastandardlaboratoryweatheringprocedure,TestMethodD5744.TheguidesuggestsstrategiesforanalysisandinterpretationofdataproducedbyTestMethodD5744onminingwasterock,metallurgicalprocessingwastes,andores.1.1.1Cooperativemanagementofthetestinginvolvesagreementofstakeholdersindefiningtheobjectivesofthetesting,analyticalrequirements,planningtheinitialestimateofdurationofthetesting,anddiscussionoftheresultsatdecisionpointstodetermineifthetestingperiodneedstobeextendedandthedispositionoftheresidues.1.2Thehumiditycelltest(HCT)enhancesreactionproducttransportintheaqueousleachofasolidmaterialsampleofspecifiedmass.Standardconditionsallowcomparisonoftherelativereactivityofmaterialsduringinterpretationofresults.1.3TheHCTmeasuresratesofweatheringproductmassrelease.Solubleweatheringproductsaremobilizedbyafixed-volumeaqueousleachthatisperformedandcollectedweekly.LeachatesamplesareanalyzedforpH,alkalinity/acidity,specificconductance,sulfates,andotherselectedanalyteswhichmayberegulatedintheenvironmentaldrainageataparticularminingormetallurgicalprocessingsite.1.4Thisguidecoverstheinterpretationofstandardhumid-itycelltestsconductedtoobtainresultsforthefollowingobjectives:GuideandObjectiveSectionsA–ConfirmationofStaticTestingResults5–6B–EvaluationofReactivityandLeachateQualityforSegregatingMine,ProcessingWaste,orOre7–8C–EvaluationofQualityofNeutralizationPotentialAvailabletoReactwithProducedAcid9–101.5ThisguideisintendedtofacilitateuseofTestMethodD5744tomeetkinetictestingregulatoryrequirementsformetallurgicalprocessingprodu...
