ASTM_C_904_-_01_2012.pdf

Designation:C90401(Reapproved 2012)Standard Terminology Relating toChemical-Resistant Nonmetallic Materials1This standard is issued under the fixed designation C904;the number immediately following the designation indicates the year oforiginal adoption or,in the case of revision,the year of last revision.A number in parentheses indicates the year of last reapproval.Asuperscript epsilon()indicates an editorial change since the last revision or reapproval.acid etch,vto clean or alter a surface by the application ofacid.adhesionthe physical attraction of two substances,espe-cially the macroscopically observable attraction of dissimilarsubstances.aggregateany inert material such as sand,gravel,slag,carbon,etc.,usually consisting of various-sized particles andused with chemical-resistant binders to form chemical-resistant mortars.back jointa vertical mortar joint,parallel to the verticalsubstrate,between a chemical-resistant construction unit anda substrate or another chemical-resistant construction unit.bearing areafor chemical-resistant polymer machinerygrout,the portion of the grout surface in contact with theunderside of a supported surface.bed jointa horizontal mortar joint between a chemical-resistant construction unit and a substrate or anotherchemical-resistant construction unit.bend angle180 minus the internal angle created by apply-ing a load on the weld joining two sheets of plastic.bindera substance used to bond aggregates or fillers,orboth,into a solid mass.broadcast resin monolithic floor surfacing a flooringsystem whereby a film of catalyzed resin binder is applied ona prepared concrete substrate followed immediately by theseeding to excess,into this wet film,of a dry inert filler.Upon hardening,any unbonded filler is removed.Theapplication may be repeated once or several times to yield agreater thickness of surfacing.A top coat may be applied.butt welding(machine)the fusing together of two pieces ofplastic which are aligned in the same plane,with the samemating thickness,by application of heat and pressure.Alsocalled hot-plate welding.castable,na combination of filler and suitable binder that isgenerally poured or compacted into place and which hard-ens.catalysta substance whose presence initiates or changes therate of a chemical reaction,but does not itself enter into thereaction.DISCUSSIONOccasionally used in the vernacular to describe asetting agent,hardener,curing agent,or promoter,etc.chemical-resistantthe ability of a material to resist degra-dation by reaction with,dissolution by,or reduction ofphysical continuity from contact with a chemical agent oragents,thereby retaining its capacity to perform as a struc-tural or aesthetic entity.chemical-resistant carbon bricka brick comprised of car-bon(including graphite)that is carbon bonded and fired to aminimum temperature of 1850F(1010C).This brick ex-hibits good resistance to thermal shock and resists exposureto a wide range of alkalies and acids,particularly hydroflu-oric acid.When used in oxidizing conditions,temperatureexposure should be less than 600F(315C).chemical-resistant construction unita modular nonmetallicmaterial,either vitreous or nonvitreous,used in industrialprocesses primarily for applications where chemical,thermal,and mechanical resistance is required.chemical-resistant fireclay or shale brick a kiln fired brickfrom clay,shale,or mixtures thereof that exhibits lowabsorption and high resistance to a wide range of chemicalenvironments.This brick should not be used in hot caustic orwhere hydrofluoric acid or other fluoride chemical com-pounds are found.Commonly referred to as acid-resistantbrick or acid-proof brick.chemical-resistant polymer concretea construction mate-rial composed of a continuous phase(binder)of a polymerand a discontinuous phase(aggregate)generally used inapplications where chemical resistance is required.chemical-resistant resin grouta mixture of liquid resin,filler and setting agent.The components form a mixture thatsubsequently hardens by chemical reaction.The settingagent may be separate or incorporated in the filler.chemical-resistant polymer machinery grout an intimatemixture of liquid resinous material,selected filler materials,1This terminology is under the jurisdiction of ASTM Committee C03 onChemical-Resistant Nonmetallic Materials and is the direct responsibility ofSubcommittee C03.05 on Terminology.Current edition approved Aug.1,2012.Published September 2012.Originallyapproved in 1979.Last previous edition approved in 2006 as C904 01(2006).DOI:10.1520/C0904-01R12.Copyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959.United States1 and setting agent,which harden by chemical reaction toprovide support for machine bases.chemical-resistant resin monolithic surfacingan intimatemixture of liquid resinous materials,selected filler materials,and setting agent.These components are mixed together,placed to a minimum thickness of 60 mils(1.5 mm),thenhardened to form