Designation:C904−01(Reapproved2018)StandardTerminologyRelatingtoChemical-ResistantNonmetallicMaterials1ThisstandardisissuedunderthefixeddesignationC904;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.acidetch,v—tocleanoralterasurfacebytheapplicationofacid.adhesion—thephysicalattractionoftwosubstances,espe-ciallythemacroscopicallyobservableattractionofdissimilarsubstances.aggregate—anyinertmaterialsuchassand,gravel,slag,carbon,etc.,usuallyconsistingofvarious-sizedparticlesandusedwithchemical-resistantbinderstoformchemical-resistantmortars.backjoint—averticalmortarjoint,paralleltotheverticalsubstrate,betweenachemical-resistantconstructionunitandasubstrateoranotherchemical-resistantconstructionunit.bearingarea—forchemical-resistantpolymermachinerygrout,theportionofthegroutsurfaceincontactwiththeundersideofasupportedsurface.bedjoint—ahorizontalmortarjointbetweenachemical-resistantconstructionunitandasubstrateoranotherchemical-resistantconstructionunit.bendangle—180°minustheinternalanglecreatedbyapply-ingaloadontheweldjoiningtwosheetsofplastic.binder—asubstanceusedtobondaggregatesorfillers,orboth,intoasolidmass.broadcastresinmonolithicfloorsurfacing—aflooringsys-temwherebyafilmofcatalyzedresinbinderisappliedonapreparedconcretesubstratefollowedimmediatelybytheseedingtoexcess,intothiswetfilm,ofadryinertfiller.Uponhardening,anyunbondedfillerisremoved.Theapplicationmayberepeatedonceorseveraltimestoyieldagreaterthicknessofsurfacing.Atopcoatmaybeapplied.buttwelding(machine)—thefusingtogetheroftwopiecesofplasticwhicharealignedinthesameplane,withthesamematingthickness,byapplicationofheatandpressure.Alsocalledhot-platewelding.castable,n—acombinationoffillerandsuitablebinderthatisgenerallypouredorcompactedintoplaceandwhichhard-ens.catalyst—asubstancewhosepres...
