Designation:C181−11(Reapproved2018)StandardTestMethodforWorkabilityIndexofFireclayandHigh-AluminaRefractoryPlastics1ThisstandardisissuedunderthefixeddesignationC181;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.1.Scope1.1Thistestmethodcoversthedeterminationofthework-abilityindexoffireclayandhigh-aluminarefractoryplasticsbymeasuringtheplasticdeformationofamoldedtestspecimenwhensubjectedtoimpacts.1.2Thevaluesstatedininch-poundunitsaretoberegardedasstandard.ThevaluesgiveninparenthesesaremathematicalconversionstoSIunitsthatareprovidedforinformationonlyandarenotconsideredstandard.1.3Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappro-priatesafety,health,andenvironmentalpracticesanddeter-minetheapplicabilityofregulatorylimitationspriortouse.1.4Thisinternationalstandardwasdevelopedinaccor-dancewithinternationallyrecognizedprinciplesonstandard-izationestablishedintheDecisiononPrinciplesfortheDevelopmentofInternationalStandards,GuidesandRecom-mendationsissuedbytheWorldTradeOrganizationTechnicalBarrierstoTrade(TBT)Committee.2.ReferencedDocuments2.1ASTMStandards:2D2906PracticeforStatementsonPrecisionandBiasforTextiles(Withdrawn2008)33.SignificanceandUse3.1Workabilityindexservesasameasureofthefacilitywithwhichrefractoryplasticmaterialscanberammed,gunned,orvibratedintoplace.3.2Workabilityindexiscommonlyusedtocontrolconsis-tencyofplasticsduringmanufacture.Ithasalsobeenfoundusefulforspecificationacceptancebytheconsumer.3.3Theworkabilityindexdeterminationcanprovideinfor-mationfordevelopingaplasticbody.Whenasamplesplitsunderimpactatvariouswatercontents,itisanindicationthatthematerialis“short”orlackinginplasticity.3.4Determinationsonsamplesthatsplitduringimpactwillbedifficulttor...
