Designation:C580−18StandardTestMethodforFlexuralStrengthandModulusofElasticityofChemical-ResistantMortars,Grouts,MonolithicSurfacings,andPolymerConcretes1ThisstandardisissuedunderthefixeddesignationC580;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.ThisstandardhasbeenapprovedforusebyagenciesoftheU.S.DepartmentofDefense.1.Scope1.1Thistestmethodcoversthedeterminationofflexuralstrengthandmodulusofelasticityinflexureofcuredchemical-resistantmaterialsintheformofmoldedrectangularbeams.Thesematerialsincludemortars,brickandtilegrouts,struc-turalgrouts,machinerygrouts,monolithicsurfacings(60milsorgreater),andpolymerconcretes.Thesematerialsshallbebasedonresin,silicate,silica,orsulfurbinders.1.2Abarofrectangularcrosssectionistestedinflexureasasimplebeamincenterpointloading:thebarrestsontwosupportsandtheloadisappliedbymeansofaloadingnosemidwaybetweensupports.1.3MethodAoutlinesthetestingproceduregenerallyusedforsystemscontainingaggregatelessthan0.2in.(5mm)insize.MethodBcoversthetestingproceduregenerallyusedforsystemscontainingaggregatefrom0.2to0.4in.(10mm)insize.MethodCisusedforsystemscontainingaggregatelargerthan0.4in.1.4Thevaluesstatedininch-poundunitsaretoberegardedasstandard.ThevaluesgiveninparenthesesaremathematicalconversionstoSIunitsthatareprovidedforinformationonlyandarenotconsideredstandard.1.5Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappro-priatesafety,health,andenvironmentalpracticesanddeter-minetheapplicabilityofregulatorylimitationspriortouse.1.6Thisinternationalstandardwasdevelopedinaccor-dancewithinternationallyrecognizedprinciplesonstandard-izationestablishedintheDecisiononPrinciplesfortheDevelopmentofInternationalStandards,GuidesandRecom-mendationsissuedb...
