1、Designation: C11 18Standard Terminology Relating toGypsum and Related Building Materials and Systems1This standard is issued under the fixed designation C11; the number immediately following the designation indicates the year of originaladoption or, in the case of revision, the year of last revision
2、. A number in parentheses indicates the year of last reapproval. A superscriptepsilon () indicates an editorial change since the last revision or reapproval.1. Scope*1.1 This standard covers terminology relating to gypsumand related building materials and systems. The terms aregenerically defined. M
3、ore specific and expanded definitionsmay appear in appropriate standards.1.2 This international standard was developed in accor-dance with internationally recognized principles on standard-ization established in the Decision on Principles for theDevelopment of International Standards, Guides and Rec
4、om-mendations issued by the World Trade Organization TechnicalBarriers to Trade (TBT) Committee.2. Referenced Documents2.1 ASTM Standards:2C22/C22M Specification for GypsumC28/C28M Specification for Gypsum PlastersC35 Specification for Inorganic Aggregates for Use in Gyp-sum PlasterC36/C36M Specific
5、ation for Gypsum Wallboard (With-drawn 2004)3C37/C37M Specification for Gypsum Lath (Withdrawn2004)3C52 Specification for Gypsum Partition Tile Or Block(Withdrawn 1982)3C59/C59M Specification for Gypsum Casting Plaster andGypsum Molding PlasterC61/C61M Specification for Gypsum Keenes CementC317/C317
6、M Specification for Gypsum ConcreteC318/C318M Specification for Gypsum FormboardC472 Test Methods for Physical Testing of Gypsum, Gyp-sum Plasters and Gypsum ConcreteC473 Test Methods for Physical Testing of Gypsum PanelProductsC475/C475M Specification for Joint Compound and JointTape for Finishing
7、Gypsum BoardC843 Specification for Application of Gypsum Veneer Plas-terC557 Specification for Adhesives for Fastening GypsumWallboard to Wood FramingC587 Specification for Gypsum Veneer PlasterC588/C588M Specification for Gypsum Base for VeneerPlasters (Withdrawn 2005)3C954 Specification for Steel
8、Drill Screws for theApplicationof Gypsum Panel Products or Metal Plaster Bases to SteelStuds from 0.033 in. (0.84 mm) to 0.112 in. (2.84 mm) inThicknessC1007 Specification for Installation of Load Bearing (Trans-verse and Axial) Steel Studs and Related AccessoriesC1396/C1396M Specification for Gypsu
9、m BoardE84 Test Method for Surface Burning Characteristics ofBuilding MaterialsE96/E96M Test Methods for Water Vapor Transmission ofMaterialsE119 Test Methods for Fire Tests of Building Constructionand MaterialsE337 Test Method for Measuring Humidity with a Psy-chrometer (the Measurement of Wet- and
10、 Dry-Bulb Tem-peratures)3. Terminologyaccelerator, na material that reduces setting time.accessories, nproducts fabricated for the purpose of formingcorners, edges, control joints, or decorative effects.adhesive, na substance capable of holding materials togetherby surface attachment.admixture, na m
11、aterial other than water, aggregates, hydrau-lic cementitious material, and fiber reinforcement that isused as an ingredient to modify properties and is added to thebatch before or during its mixture.aggregate, nan inert granular material which may be addedto gypsum plasters. (C35)all purpose compou
12、nd, na compound formulated andmanufactured to serve as both a taping and a finishingcompound.1This terminology is under the jurisdiction of ASTM Committee C11 onGypsum and Related Building Materials and Systems and is the direct responsibilityof Subcommittee C11.91 on Terminology and Editorial.Curre
13、nt edition approved June 1, 2018. Published June 2018. Originallyapproved in 1916. Last previous edition approved in 2017 as C11 17a. DOI:10.1520/C0011-18.2For referenced ASTM standards, visit the ASTM website, www.astm.org, orcontact ASTM Customer Service at serviceastm.org. For Annual Book of ASTM
14、Standards volume information, refer to the standards Document Summary page onthe ASTM website.3The last approved version of this historical standard is referenced onwww.astm.org.*A Summary of Changes section appears at the end of this standardCopyright ASTM International, 100 Barr Harbor Drive, PO B
15、ox C700, West Conshohocken, PA 19428-2959. United StatesThis international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for theDevelopment of International Standards, Guides and Recommendations issued by
16、the World Trade Organization Technical Barriers to Trade (TBT) Committee.1anhydrite, nthe mineral consisting primarily of anhydrouscalcium sulfate, CaSO4.arris (of an arch), nthe outside corner or angle formed bythe meeting of a wall surface with the curved surface of anarch (see Fig. 1).base coat,
17、nany or all layers of plaster in place prior toapplication of finish coats.DISCUSSIONThe first application is normally called a scratch coatand the second application is referred to as a brown coat.bedding coat, nthat coat of plaster to receive aggregate orother decorative material of any size, impi
18、nged or embeddedinto its surface, before it sets.bond plaster, na calcined gypsum plaster specially formu-lated for application over rough monolithic concrete as abonding coat for a subsequent gypsum plaster layer. (C28/C28M)bridging, nin framing, sections of wood or metal pieces usedbetween framing
19、 members to stiffen, give lateral support,and minimize rotation.brown coat, nthe second layer in three-coat plaster applica-tion.building construction joint, na designed division of abuilding that allows movement of all component parts of thebuilding, in any plane, which may be caused by thermal,sei
20、smic, wind loading, or any other force. The constructionof the separation is accomplished by one of the followingmethods: (1) manufactured devices suitable for thisapplication, or (2) by field fabrication of suitable materials.calcined gypsum, na dry powder; primarily calcium sulfatehemihydrate, res
21、ulting from calcination of gypsum; cemen-titious base for production of most gypsum plasters: alsocalled plaster of paris, sometimes called stucco.calcium sulfate, nthe chemical compound CaSO4.cementitious material, na material that, when mixed withwater, with or without aggregate, provides the plas
22、ticity andthe cohesive and adhesive properties necessary forplacement, and the formation of a rigid mass.check cracking (in joint systems), nshort, narrow cracksrandomly oriented in the surface of the dried joint com-pound.coat, na layer of plaster applied in a single bined water, nthe water chemica
23、lly held, as water ofcrystallization, by the calcium sulfate dihydrate or hemihy-drate pressive strength, nthe maximum load sustained by astandard specimen of a material when subjected to a crush-ing force.consistency, na property of a material determined by thecomplete flow force relation. (C557)co
24、nsistency (normal), nthe number of millilitres of waterper 100 g of gypsum plaster or gypsum concrete required toproduce a mortar or a slurry of specified fluidity. (C472)control (expansion-contraction) joint, na designed separa-tion in the system materials that allows for movement causedby expansio
25、n or contraction of the system. The constructionof the separation is accomplished by one of the followingmethods: (1) manufactured devices suitable for thisapplication, or (2) by field fabrication of suitable materials.core (of gypsum board), nthe hardened material filling thespace between the face
26、and back papers consisting substan-tially of rehydrated gypsum with additives.core (of gypsum panel products), nthe hardened material,consisting substantially of gypsum, with additives, that fillsthe space between the face and the back of the gypsum panelproduct.cored tile or block, nsee gypsum tile
27、 or block. (C52)cornerbead, nan accessory for outside corners.corner reinforcement, exterior, na preformed section ofwire or expanded sheet steel, for the reinforcement ofexterior stucco external corners (arrises).cure (portland cement plaster or stucco), v(1) to provideconditions conducive to the h
28、ydration process of portlandcement plaster or stucco, or (2) to maintain proper tempera-ture and a sufficient quantity of water within the plaster toensure cement hydration.density, nthe weight per unit volume of a material. (C472)dried sample, na sample devoid of free water.edge (of glass mat gypsu
29、m panels), nthe bound edge asmanufactured.edge (of gypsum board), nthe paper-bound edge as manu-factured.edge trim, nan accessory to cover exposed ends or edges ofgypsum board.embedding compoundsee taping compound.FIG. 1 Arris (of an Arch)C11182end (of glass mat gypsum panels), nthe end perpendicula
30、rto the bound edge. The gypsum core is always exposed.end (of gypsum board), nthe end perpendicular to thepaper-bound edge. The gypsum core is always exposed.expansion joint, nsee control (expansion-contraction)joint.face, nthe surface designed to be left exposed to view or toreceive decoration or a
31、dditional finishes.facer, na woven or nonwoven fabric or membrane on thesurface of a gypsum board or gypsum panel product that isan integral part of the product.featured edge, nan edge configuration of the paper boundedge of gypsum board that provides special design orperformance.fineness modulus, n
32、an empirical factor obtained by addingtotal percentages of a sample of aggregate retained on eachof a specified series of sieves and dividing by 100. The sievesizes used are: No. 100 (150 m), No. 50 (300 m), No. 30(600 m), No. 16 (1.18 mm), No. 8 (2.36 mm), No. 4 (4.75mm),38 in. (9.5 mm),34 in. (19.
33、0 mm), 112 in. (38.1 mm)and larger, increasing in the ratio of 2 to 1.finish coat, nthe final layer of plaster applied over a basecoator other substrate.finishing compound, n(sometimes called topping com-pound) a compound specifically formulated and manufac-tured for use over taping or all purpose c
34、ompounds toprovide a smooth and level surface for the application ofdecoration.fire-resistance classification, na standard rating of fire-resistance and protective characteristics of a building con-struction or assembly. (E119)flame spread classification, na standard rating of relativesurface burnin
35、g characteristics of a building material ascompared to a standard material. (E84)flexural strength, nthe maximum load sustained by astandard specimen of a sheet material when subjected to abending force.floating, vthe act of spreading, compacting, or consolidatingto achieve a specified uniform appea
36、rance.framing member, nstud, plate, track, joist, furring, and othersupport to which a gypsum panel product, or metal plasterbase is attached.free water, nall water contained by gypsum board or plasterin excess of that chemically held as water of crystallization.gauging plaster, na calcined gypsum p
37、laster designed to bemixed with lime putty. (C28/C28M)glass mat, na woven or non-woven fabric of glass fibers withor without a binder.glass mat gypsum panel, na gypsum panel product withglass mat facers.grout, ngypsum or portland cement plaster used to fillcrevices or to fill hollow metal frames.gyp
38、sum, nthe mineral consisting primarily of fully hydratedcalcium sulfate, CaSO42H2O or calcium sulfate dihydrate.(C22/C22M)gypsum backing board, na14 in. to58 in. gypsum board foruse as a backing for gypsum wallboard, acoustical tile, orother dry cladding.water resistant gypsum backing boarda gypsum
39、boarddesigned for use on walls primarily as a base for the applicationof ceramic, or plastic tile.gypsum base for veneer plasters, na gypsum board used asthe base for application of a gypsum veneer plaster. (C588/C588M)gypsum board, nthe generic name for a family of sheetproducts consisting of a non
40、combustible core primarily ofgypsum with paper surfacing.gypsum casting plaster, na calcined gypsum plaster usedprimarily to form objects, such as lamp bases, art ware, andnovelties, and so forth. (C59/C59M)gypsum concrete, na calcined gypsum mixed with woodchips or aggregate, or both. (C317/C317M)g
41、ypsum core board, na34 in. (19.0 mm) to 1 in. (25.4 mm)gypsum board consisting of a single board or factorylaminated multiple boards, used as a gypsum stud or core insemisolid or solid gypsum board partitions.gypsum formboard, na gypsum panel product used as thepermanent form for poured gypsum roof
42、decks. (C318/C318M)gypsum lath, na gypsum board used as the base forapplication of gypsum plaster. (C37/C37M)perforated gypsum latha gypsum lath having perforationsto provide mechanical keying of the basecoat plaster.foil-backed gypsum laththe same as plain gypsum lathexcept that in addition, the ba
43、ck surface shall be covered witha continuous sheet of pure bright finished aluminum foil.type X latha gypsum lath specially manufactured toprovide specific fire-resistant characteristics.gypsum molding plaster, na calcined gypsum plaster usedprimarily for plaster casts or molds, sometimes used as ag
44、auging plaster. (C59/C59M, C28/C28M)gypsum neat plaster, na calcined gypsum mixed at the millwith ingredients to control working quality and setting time.(C28/C28M)DISCUSSIONNeat plaster is either fibered or unfibered. The additionof aggregate is required on the job.gypsum panel products, nthe gener
45、al name for a family ofsheet products consisting essentially of gypsum.C11183gypsum plaster, nthe generic name for a family of powderedcementitious products consisting primarily of calcined gyp-sum with additives to modify physical characteristics, andhaving the ability, when mixed with water, to pr
46、oduce aplastic mortar or slurry which can be formed to the desiredshape by various methods and will subsequently set to ahard, rigid mass. (C28/C28M)gypsum sheathing, na gypsum board used as a backing forexterior surface materials, manufactured with water-repellant paper and may be manufactured with
47、 a water-resistant core. (C1396/C1396M)gypsum tile or block, na cast gypsum building unit. (C52)gypsum veneer plaster systems, nveneer plaster applied inaccordance with Specification C843 to gypsum base forveneer plasters.gypsum wallboard, na gypsum board used primarily as aninterior surfacing for b
48、uilding structures. (C36/C36M)foil-backed gypsum wallboarda gypsum wallboard withthe back surface covered with a continuous sheet of pure brightfinished aluminum foil. (C36/C36M)type X gypsum wallboarda gypsum wallboard speciallymanufactured to provide specific fire-resistant characteristics(C36/C36
49、M).gypsum wood-fibered plaster, na calcined gypsum plastercontaining shredded or ground wood fiber added duringmanufacture.hemihydrate, nthe dry powder, calcium sulfatehemihydrate, resulting from calcination of CaSO42H2O,calcium sulfate dihydrate. See calcined gypsum.joining, nthe juncture of two separate plaster applications ofthe same coat, usually within a single surface plane.joint compound, ngeneric term referring to all compoundsused for taping or finishing g
