1、Designation: C 11 08cStandard Terminology Relating toGypsum and Related Building Materials and Systems1This standard is issued under the fixed designation C 11; the number immediately following the designation indicates the year of originaladoption or, in the case of revision, the year of last revis
2、ion. 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
3、. More specific and expanded definitionsmay appear in appropriate standards.2. Referenced Documents2.1 ASTM Standards:2C 22/C 22M Specification for GypsumC 28/C 28M Specification for Gypsum PlastersC35 Specification for Inorganic Aggregates for Use inGypsum PlasterC 36/C 36M Specification for Gypsum
4、 Wallboard3C 37/C 37M Specification for Gypsum Lath3C52 Specification for Gypsum Partition Tile or Block3C 59/C 59M Specification for Gypsum Casting Plaster andGypsum Molding PlasterC 61/C 61M Specification for Gypsum Keenes CementC 317/C 317M Specification for Gypsum ConcreteC 318/C 318M Specificat
5、ion for Gypsum FormboardC 472 Test Methods for Physical Testing of Gypsum, Gyp-sum Plasters and Gypsum ConcreteC 473 Test Methods for Physical Testing of Gypsum PanelProductsC 475/C 475M Specification for Joint Compound and JointTape for Finishing Gypsum BoardC 843 Specification for Application of G
6、ypsum VeneerPlasterC 557 Specification for Adhesives for Fastening GypsumWallboard to Wood FramingC 587 Specification for Gypsum Veneer PlasterC 588/C 588M Specification for Gypsum Base for VeneerPlasters3C 954 Specification for Steel Drill Screws for the Applica-tion of Gypsum Panel Products or Met
7、al Plaster Bases toSteel Studs from 0.033 in. (0.84 mm) to 0.112 in. (2.84mm) in ThicknessC 1396/C 1396M Specification for Gypsum BoardE84 Test Method for Surface Burning Characteristics ofBuilding MaterialsE 96/E 96M Test Methods for Water Vapor Transmission ofMaterialsE119 Test Methods for Fire Te
8、sts of Building Constructionand MaterialsE 337 Test Method for Measuring Humidity with a Psy-chrometer (the Measurement of Wet- and Dry-Bulb Tem-peratures)3. Terminologyaccelerator, na material that reduces setting time.accessories, nproducts fabricated for the purpose of formingcorners, edges, cont
9、rol joints, or decorative effects.adhesive, na substance capable of holding materials togetherby surface attachment.admixture, na material other than water, aggregates, hy-draulic cementitious material, and fiber reinforcement that isused as an ingredient to modify properties and is added to thebatc
10、h before or during its mixture.aggregate, nan inert granular material which may be addedto gypsum plasters. (C35)all purpose compound, na compound formulated andmanufactured to serve as a taping or finishing compound, orboth.anhydrite, nthe mineral consisting primarily of anhydrouscalcium sulfate, C
11、aSO4.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, nany or all layers of plaster in place prior toapplication of finish coats.DISCUSSIONThe first application is normally called a scratch coatand the s
12、econd 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 it sets.bond plaster, na calcined gypsum plaster specially formu-lated for application over rough monolithic
13、 concrete as a1This 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.Current edition approved Aug. 1, 2008. Published September 2008. Originallyapproved
14、in 1916. Last previous edition approved in 2008 as C 11 08b.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.3
15、Withdrawn.1*A Summary of Changes section appears at the end of this standard.Copyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.bonding coat for a subsequent gypsum plaster layer.(C 28/C 28M)bridging, nin framing, sections of wood or met
16、al piecesused between framing members to stiffen, give lateralsupport, 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
17、 may be caused by thermal,seismic, wind loading, or any other force. The constructionof the separation is accomplished by one of the followingmethods: (1) manufactured devices suitable for this applica-tion, or (2) by field fabrication of suitable materials.calcined gypsum, na dry powder; primarily
18、calcium sulfatehemihydrate, resulting 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 witho
19、ut aggregate, provides the plasticity andthe cohesive and adhesive properties necessary for place-ment, 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 singl
20、e bined water, nthe water chemically 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 thecompl
21、ete flow force relation. (C 557)consistency (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. (C 472)control (expansion-contraction) joint, na designed separa-tion in the system materials that al
22、lows for movement causedby expansion or contraction of the system. The constructionof the separation is accomplished by one of the followingmethods: (1) manufactured devices suitable for this applica-tion, or (2) by field fabrication of suitable materials.core (of gypsum board), nthe hardened materi
23、al filling thespace between the face and back papers consisting substan-tially 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, f
24、or the reinforcement ofexterior stucco external corners (arrises).cure (portland 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 t
25、oensure cement hydration.density, nthe weight per unit volume of a material.(C 472)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 e
26、nds or edges ofgypsum board.embedding compoundsee taping compound.end (of glass 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
27、 control (expansion-contraction)joint.face, nthe surface designed to be left exposed to view or toreceive decoration or additional finishes.featured edge, nan edge configuration of the paper boundedge of gypsum board that provides special design orperformance.fineness modulus, nan empirical factor o
28、btained 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. (19.0 mm), 112 in. (38.1
29、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 compounds toprovide a
30、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 burning characteristics of
31、a building material ascompared to a standard material. (E84)FIG. 1 Arris (of an Arch)C1108c2flexural 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 un
32、iform appearance.framing member, nstud, plate, track, joist, furring, andother support to which a gypsum panel product, or metalplaster base is attached.free water, nall water contained by gypsum board or plasterin excess of that chemically held as water of crystallization.gauging plaster, na calcin
33、ed gypsum plaster designed to bemixed with lime putty. (C 28/C 28M)glass mat, na woven or non-woven fabric of glass fiberswith or without a binder.grout, ngypsum or portland cement plaster used to fillcrevices or to fill hollow metal frames.gypsum, nthe mineral consisting primarily of fully hydrated
34、calcium sulfate, CaSO42H2O or calcium sulfate dihydrate.(C 22/C 22M)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 boarddesigned for use on walls primarily as a base for
35、 theapplication of ceramic, or plastic tile.gypsum base for veneer plasters, na gypsum board used asthe base for application of a gypsum veneer plaster.(C 588/C 588M)gypsum board, nthe generic name for a family of sheetproducts consisting of a noncombustible core primarily ofgypsum with paper surfac
36、ing.gypsum casting plaster, na calcined gypsum plaster usedprimarily to form objects, such as lamp bases, art ware, andnovelties, etc. (C 59/C 59M)gypsum concrete, na calcined gypsum mixed with woodchips or aggregate, or both. (C 317/C 317M)gypsum core board, na34 in. (19.0 mm) to 1 in. (25.4 mm)gyp
37、sum 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 decks. (C 318/C 318M)gypsum lath, na gypsum board used as
38、the base forapplication of gypsum plaster. (C 37/C 37M)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 back surface shall be coveredwith a continuous sheet of
39、pure bright finished aluminumfoil.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 agauging plaster. (C 59/C 59M, C 28/C 28M)gypsum neat pla
40、ster, na calcined gypsum mixed at the millwith ingredients to control working quality and setting time.(C 28/C 28M)DISCUSSIONNeat plaster is either fibered or unfibered. The additionof aggregate is required on the job.gypsum panel products, nthe general name for a family ofsheet products consisting
41、essentially of gypsum.gypsum plaster, nthe generic name for a family of pow-dered cementitious products consisting primarily of calcinedgypsum with additives to modify physical characteristics,and having the ability, when mixed with water, to produce aplastic mortar or slurry which can be formed to
42、the desiredshape by various methods and will subsequently set to ahard, rigid mass. (C 28/C 28M)gypsum sheathing, na gypsum board used as a backing forexterior surface materials, manufactured with water-repellant paper and may be manufactured with a water-resistant core. (C 1396/C 1396M)gypsum tile
43、or block, na cast gypsum building unit.(C52)gypsum veneer plaster systems, nveneer plaster applied inaccordance with Specification C 843 to gypsum base forveneer plasters.gypsum wallboard, na gypsum board used primarily as aninterior surfacing for building structures. (C 36/C 36M)foil-backed gypsum
44、wallboarda gypsum wallboard withthe back surface covered with a continuous sheet of purebright finished aluminum foil. (C 36/C 36M)type X gypsum wallboarda gypsum wallboard speciallymanufactured to provide specific fire-resistant characteristics(C 36/C 36M).gypsum wood-fibered plaster, na calcined g
45、ypsum plastercontaining shredded or ground wood fiber added duringmanufacture.hemihydrate, nthe dry powder, calcium sulfate hemihy-drate, resulting from calcination of CaSO42H2O, calciumsulfate dihydrate. See calcined gypsum.joining, nthe juncture of two separate plaster applications ofthe same coat
46、, usually within a single surface plane.joint compound, na compound used for taping or finishinggypsum board, or both.joint tape, na type of paper, metal, fabric, glass mesh, orother material, commonly used with a cementitious com-pound, to reinforce the joints between adjacent gypsumboards. (C 475/
47、C 475M)joint tape, self-adhering, na joint tape manufactured toadhere directly to the substrate.DISCUSSIONTapes having this quality do not require mechanical orembedment means of attachment to the substrate.Keenes cement, nan anhydrous gypsum plaster character-ized by a low mixing water requirement
48、and special settingproperties, primarily used with lime to produce hard, densefinish coats. (C 61/C 61M)key, nthe grip or mechanical bond of one coat of plaster toanother coat, or to a substrate.DISCUSSIONIt may be accomplished physically by the penetration ofC1108c3wet mortar or crystals into paper
49、 fibers, perforations, scoring irregu-larities, or by the embedment of the lath.lathsee gypsum lath.load-bearing partition, na partition designed to support aportion of the building structure.machine direction, nthe direction parallel to the paper-bound edge of the gypsum board.manufactured sand, nthe fine material resulting from thecrushing and classification by screening, or otherwise, ofrock, gravel, or blast furnace slag. (C35)masonry cement, na hydrau
