ASTM C11-2008b Standard Terminology Relating to Gypsum and Related Building Materials and Systems.pdf

1、Designation: C 11 08bStandard 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 1396/C 1396M Specification for Gypsum BoardE84 Test Method for Surface Burning Characteristic

7、s 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. Terminologyaccelerator, na

8、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-draulic cemen

9、titious 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 serve as

10、 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).base coat, nany or all layers of plaster in p

11、lace 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, impinged or embeddedinto its surface,

12、before it sets.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.Current edition approved May 1, 2008. Published June 2008. Originallyapproved in 19

13、16. Last previous edition approved in 2008 as C 11 08a.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.3Withd

14、rawn.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.bond plaster, na calcined gypsum plaster specially formu-lated for application over rough monolithic concrete as a

15、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 joint, na d

16、esigned 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 suitable for th

17、is 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.calcium sulfa

18、te, 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.check cracking (in joint systems), nshort, narrow cra

19、cksrandomly 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 the calcium sulfate dihydrate or hemihy-drate pressive strength, nthe maximum load sustained by astandard specimen of

20、 a material when subjected to a crush-ing force.consistency, na property of a material determined by thecomplete 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 fl

21、uidity. (C 472)control (expansion-contraction) joint, na designed separa-tion in the system materials that 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

22、 applica-tion, 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-tially of rehydrated gypsum with additives.cored tile or block, nsee gypsum tile or block. (C52)cornerbead, nan accesso

23、ry 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 hydration process of portlandcement plas

24、ter 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.(C 472)dried sample, na sample devoid of free water.edge (of glass mat gypsum panels), nthe bound edge asmanufactur

25、ed.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 glass mat gypsum panels), nthe end perpendicularto the bound edge. The gypsum core is always exposed.end (of gypsum b

26、oard), 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 additional finishes.featured edge, nan edge configuration of the paper

27、boundedge of 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.

28、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 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

29、 compound specifically 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 a

30、ssembly. (E119)flame spread classification, na standard rating of relativesurface burning characteristics of a building material asFIG. 1 Arris (of an Arch)C1108b2compared to a standard material. (E84)flexural strength, nthe maximum load sustained by astandard specimen of a sheet material when subje

31、cted to abending force.floating, vthe act of spreading, compacting, or consolidatingto achieve a specified 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 gy

32、psum board or plasterin excess of that chemically held as water of crystallization.gauging plaster, na calcined 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 us

33、ed to fillcrevices or to fill hollow metal frames.gypsum, nthe mineral consisting primarily of fully hydratedcalcium 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

34、 cladding.water resistant gypsum backing boarda gypsum boarddesigned for use on walls primarily as a base for 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 generi

35、c name for a family of sheetproducts consisting of 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, etc. (C 59/C 59M)gypsum concrete, na calcined gypsum mixed wi

36、th 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 factorylaminated multiple boards, used as a gypsum stud or core insemisolid or solid gypsum board partitions.gypsum formboard, na gypsum panel produc

37、t 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. (C 37/C 37M)perforated gypsum latha gypsum lath having perforationsto provide mechanical keying of the basecoat plaster.foil-backed gypsum laththe s

38、ame as plain gypsum lathexcept that in addition, the back surface shall be coveredwith a continuous sheet of pure bright finished aluminumfoil.type X latha gypsum lath specially manufactured toprovide specific fire-resistant characteristics.gypsum molding plaster, na calcined gypsum plaster usedprim

39、arily 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 millwith ingredients to control working quality and setting time.(C 28/C 28M)DISCUSSIONNeat plaster is either fibered or unfibered. The additionof aggreg

40、ate is required on the job.gypsum panel products, nthe general name for a family ofsheet products consisting 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 characteristic

41、s,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 subsequently set to ahard, rigid mass. (C 28/C 28M)gypsum sheathing, na gypsum board used as a backing forexterior surface materials, manufactured

42、 with water-repellant paper and may be manufactured with a water-resistant core. (C 1396/C 1396M)gypsum tile 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

43、 gypsum board used primarily as aninterior surfacing for building structures. (C 36/C 36M)foil-backed gypsum 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 speciallymanufactu

44、red to provide specific fire-resistant characteristics(C 36/C 36M).gypsum wood-fibered plaster, na calcined gypsum plastercontaining shredded or ground wood fiber added duringmanufacture.hemihydrate, nthe dry powder, calcium sulfate hemihy-drate, resulting from calcination of CaSO42H2O, calciumsulfa

45、te dihydrate. See calcined gypsum.joining, nthe juncture of two separate plaster applications ofthe same coat, 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

46、, 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 manufactured toadhere directly to the substrate.DISCUSSIONTapes having this quality do not require mechanical orembedment means of attachment t

47、o the substrate.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. (C 61/C 61M)C1108b3key, nthe grip or mechanical bond of one coat of plaster toanother coat, or to a

48、 substrate.DISCUSSIONIt may be accomplished physically by the penetration ofwet mortar or crystals into paper 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

49、.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 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, natura