1、Designation: C11 16Standard 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.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 Specification for Gypsum Wallbo
4、ard (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2004)3C37/C37M Specification for Gypsum Lath (Withdrawn2004)3C52 Specification for Gypsum Partition Tile Or Block(Withdrawn 1982)3C59/C59M Specification for Gypsum Casting Plaster andGypsum Molding PlasterC61/C61M Specification for Gypsum Keenes CementC317/C317M Specification for Gyp
5、sum 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 Gypsum BoardC843 Specif
6、ication 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to Wood FramingC587 Specification for Gypsum Veneer PlasterC588/C588M Specification for Gypsum Base for VeneerPlasters (Withdrawn 2005)3C954 Specification for Steel Drill Screws for theApp
7、licationof 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 Gypsum BoardE84 Test Method
8、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 Dry-Bulb Tem-peratures
9、)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 material other than wate
10、r, 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 compound, na compound formula
11、ted andmanufactured to serve as both a taping and a finishingcompound.anhydrite, 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).1This terminolo
12、gy 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.Current edition approved May 15, 2016. Published June 2016. Originallyapproved in 1916. Last previous edition app
13、roved in 2015 as C11 15a. DOI:10.1520/C0011-16.2For referenced ASTM standards, visit the ASTM website, www.astm.org, orcontact ASTM Customer Service at serviceastm.org. For Annual Book of ASTMStandards volume information, refer to the standards Document Summary page onthe ASTM website.3The last appr
14、oved 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 Box C700, West Conshohocken, PA 19428-2959. United States1base coat, nany or all layers of plaster in place p
15、rior 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, impinged or embeddedinto its surface, before
16、 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 members to stiffen, give lateral suppor
17、t,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,seismic, wind loading, or any other force.
18、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, resulting from calcination of gypsum; cemen
19、-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 plasticity andthe cohesive and adhesive prop
20、erties 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 chemically held, as water ofcrystallization, by
21、 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)consistency (normal), nthe number of milli
22、litres 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 expansion or contraction of the system. The cons
23、tructionof 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 and back papers consisting substan-tiall
24、y of rehydrated gypsum with additives.cored tile or block, nsee gypsum tile 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 (portl
25、and cement plaster or stucco), v(1) to provideconditions conducive to the hydration 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.
26、(C472)dried sample, na sample devoid of free water.edge (of glass mat gypsum 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.end (of gla
27、ss mat gypsum panels), nthe end perpendicularto 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
28、exposed to view or toreceive decoration or additional finishes.FIG. 1 Arris (of an Arch)C11162facer, 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
29、gypsum board that provides special design orperformance.fineness modulus, nan 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
30、. 16 (1.18 mm), No. 8 (2.36 mm), No. 4 (4.75mm),38 in. (9.5 mm),34 in. (19.0 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 spe
31、cifically formulated and manufac-tured for use over taping or all purpose compounds 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. (E11
32、9)flame spread classification, na standard rating of relativesurface burning 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
33、spreading, compacting, or consolidatingto achieve a specified uniform appearance.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 chemic
34、ally held as water of crystallization.gauging plaster, na calcined gypsum plaster designed to bemixed with lime putty. (C28/C28M)glass mat, na woven or non-woven fabric of glass fibers withor without a binder.grout, ngypsum or portland cement plaster used to fillcrevices or to fill hollow metal fram
35、es.gypsum, 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 g
36、ypsum 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
37、 a noncombustible 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/C
38、317M)gypsum 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
39、 roof 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,
40、the back 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
41、 as agauging 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
42、 general name for a family ofsheet products consisting essentially of gypsum.gypsum 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
43、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
44、 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.C11163gypsum wallboard, na gypsum board used primarily as aninterior surfacing
45、 for building 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(C
46、36/C36M).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
47、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 gypsum board, or both. See allpurpose compound, finishing compound, taping com-pound.joint tape, na strip of tape made from pa
48、per, metal, fabric,glass mesh, or other material, that is commonly used in ajoint system to reinforce the joints between adjacent gypsumpanel products. (C475/C475M)glass-mesh joint tape, njoint tape made from multidirec-tional glass yarn.paper joint tape, njoint tape made from paper and de-signed to
49、 be embedded in the joint compound.self-adhering joint tape, na glass-mesh joint tape designedto adhere without requiring mechanical attachment.Keenes cement, nan anhydrous gypsum plaster character-ized by a low mixing water requirement and special settingproperties, primarily used with lime to produce hard, densefinish coats. (C61/C61M)key, nthe grip or mechanical bond of one coat of plaster toanother coat, or to a substrate.DISCUSSIONIt may be accomplished
