1、Designation: C 11 07aStandard 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 (e) 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 define
3、d. 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 Gypsu
4、m 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 79/C 79M Specification for Gypsum Sheathing Board3C 317/C 317M Spe
5、cification for Gypsum ConcreteC 318/C 318M Specification 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
6、 Gypsum BoardC 843 Specification for Application of Gypsum 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 VeneerPlasters3E84 Test Method for Surface Burning Charac
7、teristics ofBuilding MaterialsE 96/E 96M Test Methods for Water Vapor Transmission ofMaterialsE119 Test Methods for Fire Tests of Building Constructionand MaterialsE 337 Test Method for Measuring Humidity with a Psy-chrometer (the Measurement of Wet- and Dry-Bulb Tem-peratures)3. Terminologyaccelera
8、tor, 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 water, aggregates, hy-draul
9、ic 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 formulated andmanufactured to
10、serve as a taping or finishing compound, orboth.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).basecoat, nthe first layer or layers
11、of plaster applied overlath or other substrate.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 sur
12、face, before it sets.bond plaster, na calcined gypsum plaster specially formu-lated for application over rough monolithic 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
13、 C11.91 on Terminology and Editorial.Current edition approved Sept. 15, 2007. Published October 2007. Originallyapproved in 1916. Last previous edition approved in 2007 as C 11 07.2For referenced ASTM standards, visit the ASTM website, www.astm.org, orcontact ASTM Customer Service at serviceastm.org
14、. For Annual Book of ASTMStandards volume information, refer to the standards Document Summary page onthe ASTM website.3Withdrawn.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, Uni
15、ted States.bonding coat for a subsequent gypsum plaster layer.(C 28/C 28M)bridging, nin framing, sections of wood or metal piecesused between framing members to stiffen, give lateralsupport, and minimize rotation.brown coat, nthe second layer in three-coat plaster applica-tion.building construction
16、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. The constructionof the separation is accomplished by one of the followingmethods: (1) manufactured devices suit
17、able for this applica-tion, or (2) by field fabrication of suitable materials.calcined gypsum, na dry powder; primarily calcium sulfatehemihydrate, resulting from calcination of gypsum; cemen-titious base for production of most gypsum plasters: alsocalled plaster of paris, sometimes called stucco.ca
18、lcium sulfate, nthe chemical compound CaSO4.cementitious material, na material that, when mixed withwater, with or without aggregate, provides the plasticity andthe cohesive and adhesive properties necessary for place-ment, and the formation of a rigid mass.coat, na layer of plaster applied in a sin
19、gle 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 thecom
20、plete 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
21、allows 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 mate
22、rial 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,
23、 for 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
24、 toensure 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
25、 ends 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, ns
26、ee 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
27、 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. (19.0 mm), 112 in. (38.
28、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 compounds toprovide
29、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 burning characteristics o
30、f 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.FIG. 1 Arris (of an Arch)C1107a2floating, vthe act of spreading, compacting, or consolidatingto achieve a specified
31、uniform 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 calc
32、ined gypsum plaster designed to bemixed with lime putty. (C 28/C 28M)glass mat, na mat of glass fibers.grout, ngypsum or portland cement plaster used to fillcrevices or to fill hollow metal frames.gypsum, nthe mineral consisting primarily of fully hydratedcalcium sulfate, CaSO42H2O or calcium sulfat
33、e 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 theapplication of ceramic, or plastic tile.
34、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 surfacing.gypsum casting plaster, na calcined gyps
35、um 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)gypsum board consisting of a single board or fa
36、ctorylaminated 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 the base forapplication of gypsum plaster. (
37、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 pure bright finished aluminumfoil.type X lat
38、ha 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 plaster, na calcined gypsum mixed at the millwi
39、th 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 essentially of gypsum.gypsum plaster, nthe g
40、eneric 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 the desiredshape by various methods and will
41、 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 79/C 79M)gypsum tile or block, na cast gypsum building unit.(C52)gyps
42、um 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 wallboarda gypsum wallboard withthe back surface
43、 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 gypsum plastercontaining shredded or ground wood
44、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, usually within a single surface plane.joint co
45、mpound, 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/C 475M)joint tape, self-adhering, na joint tape
46、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 and special settingproperties, primarily used wi
47、th 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 ofwet mortar or crystals into paper fibers, perforations, scoring irregu-larities, or by t
48、he embedment of the lath.lathsee gypsum lath.C1107a3load-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
49、classification by screening, or otherwise, ofrock, gravel, or blast furnace slag. (C35)masonry cement, na hydraulic cement for use in mortars formasonry construction, containing one or more of the follow-ing materials: portland cement, portland blast furnace slagcement, portland-pozzolan cement, natural cement, slagcement, or hydraulic lime; and in addition usually containingone or more materials such as hydrated lime, limestone,chalk, calcareous shell, talc
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