Designation:C903−15´1StandardPracticeforPreparingRefractorySpecimensbyColdGunning1ThisstandardisissuedunderthefixeddesignationC903;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.ε1NOTE—EditorialchangesweremadethroughoutinApril2016.1.Scope1.1Thispracticecoversaprocedureforpreparingrefractoryspecimensusuallycontainingcalciumaluminatecementwithorwithoutmetalfibersbycoldnozzle-mixgunning.SpecimenspreparedinaccordancewiththispracticeareintendedforuseinstandardASTMtestmethodsrequiredforevaluatinggunnedmaterials.1.2Thevaluesstatedininch-poundunitsaretoberegardedasstandard.ThevaluesgiveninparenthesesaremathematicalconversionstoSIunitsthatareprovidedforinformationonlyandarenotconsideredstandard.1.3Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappro-priatesafetyandhealthpracticesanddeterminetheapplica-bilityofregulatorylimitationspriortouse.2.ReferencedDocuments2.1ASTMStandards:2C401ClassificationofAluminaandAlumina-SilicateCastableRefractoriesC865PracticeforFiringRefractoryConcreteSpecimens3.SignificanceandUse3.1Thepropertiesofrefractoriescanbeaffectedbytheirmethodofinstallation.Thispracticeattemptstominimizethevariablesencounteredduringinstallationbypneumaticgun-ning.3.2ThispracticeprovidesparameterstoproducegunnedspecimensforuseinotherASTMtestmethods.3.3Thispracticemaybeusedtoproducespecimensforacceptancetesting,serviceevaluation,manufacturingcontrol,andresearchanddevelopment.3.4Differencesbetweenvariouskindsofequipmentandthedifferencesinproceduresandoperatortechniquesmayresultinsignificantvariationsinthephysicalpropertiesofthegunnedspecimens.Itisrecommendedthatthesameoperatorusethesameequipmenttoproducespecimensforrefereetestingagreedtobytheinvolvedtestingparties.The...
