1、Designation: C11 18aC11 18bStandard 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
2、revision.Anumber in parentheses indicates the year of last reapproval.Asuperscriptepsilon () indicates an editorial change since the last revision or reapproval.1. Scope*1.1 This standard covers terminology relating to gypsum and related building materials and systems. The terms are genericallydefin
3、ed. More specific and expanded definitions may appear in appropriate standards.1.2 This international standard was developed in accordance with internationally recognized principles on standardizationestablished in the Decision on Principles for the Development of International Standards, Guides and
4、 Recommendations issuedby the World Trade Organization Technical Barriers 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 Gypsum PlasterC36/C36M Specif
5、ication for Gypsum Wallboard (Withdrawn 2004)3C37/C37M Specification for Gypsum Lath (Withdrawn 2004)3C52 Specification for Gypsum Partition Tile Or Block (Withdrawn 1982)3C59/C59M Specification for Gypsum Casting Plaster and Gypsum Molding PlasterC61/C61M Specification for Gypsum Keenes CementC317/
6、C317M Specification for Gypsum ConcreteC318/C318M Specification for Gypsum FormboardC472 Test Methods for Physical Testing of Gypsum, Gypsum Plasters and Gypsum ConcreteC473 Test Methods for Physical Testing of Gypsum Panel ProductsC475/C475M Specification for Joint Compound and Joint Tape for Finis
7、hing Gypsum BoardC843 Specification for Application of Gypsum Veneer PlasterC557 Specification for Adhesives for Fastening Gypsum Wallboard to Wood FramingC587 Specification for Gypsum Veneer PlasterC588/C588M Specification for Gypsum Base for Veneer Plasters (Withdrawn 2005)3C954 Specification for
8、Steel Drill Screws for the Application of Gypsum Panel Products or Metal Plaster Bases to Steel Studsfrom 0.033 in. (0.84 mm) to 0.112 in. (2.84 mm) in ThicknessC1007 Specification for Installation of Load Bearing (Transverse and Axial) Steel Studs and Related AccessoriesC1396/C1396M Specification f
9、or Gypsum BoardE84 Test Method for Surface Burning Characteristics of Building MaterialsE96/E96M Test Methods for Water Vapor Transmission of MaterialsE119 Test Methods for Fire Tests of Building Construction and MaterialsE337 Test Method for Measuring Humidity with a Psychrometer (the Measurement o
10、f Wet- and Dry-Bulb Temperatures)3. Terminologyaccelerator, na material that reduces setting time.accessories, nproducts fabricated for the purpose of forming corners, edges, control joints, or decorative effects.1 This terminology is under the jurisdiction of ASTM Committee C11 on Gypsum and Relate
11、d Building Materials and Systems and is the direct responsibility ofSubcommittee C11.91 on Terminology and Editorial.Current edition approved Oct. 1, 2018Nov. 1, 2018. Published October 2018November 2018. Originally approved in 1916. Last previous edition approved in 2018 asC11 18.C11 18a. DOI: 10.1
12、520/C0011-18A.10.1520/C0011-18B.2 For referencedASTM standards, visit theASTM website, www.astm.org, or contactASTM Customer Service at serviceastm.org. ForAnnual Book ofASTM Standardsvolume information, refer to the standards Document Summary page on the ASTM website.3 The last approved version of
13、this historical standard is referenced on www.astm.org.This document is not an ASTM standard and is intended only to provide the user of an ASTM standard an indication of what changes have been made to the previous version. Becauseit may not be technically possible to adequately depict all changes a
14、ccurately, ASTM recommends that users consult prior editions as appropriate. In all cases only the current versionof the standard as published by ASTM is to be considered the official document.*A Summary of Changes section appears at the end of this standardCopyright ASTM International, 100 Barr Har
15、bor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States1adhesive, na substance capable of holding materials together by surface attachment.admixture, na material other than water, aggregates, hydraulic cementitious material, and fiber reinforcement that is used as aningredient to mod
16、ify properties and is added to the batch before or during its mixture.aggregate, nan inert granular material which may be added to gypsum plasters. (C35)all purpose compound, na compound formulated and manufactured to serve as both a taping and a finishing compound.anhydrite, nthe mineral consisting
17、 primarily of anhydrous calcium sulfate, CaSO4.arris (of an arch), nthe outside corner or angle formed by the meeting of a wall surface with the curved surface of an arch (seeFig. 1).base coat, nany or all layers of plaster in place prior to application of finish coats.DISCUSSIONThe first applicatio
18、n is normally called a scratch coat and the second application is referred to as a brown coat.bedding coat, nthat coat of plaster to receive aggregate or other decorative material of any size, impinged or embedded into itssurface, before it sets.bond plaster, na calcined gypsum plaster specially for
19、mulated for application over rough monolithic concrete as a bonding coatfor a subsequent gypsum plaster layer. (C28/C28M)bridging, nin framing, sections of wood or metal pieces used between framing members to stiffen, give lateral support, andminimize rotation.brown coat, nthe second layer in three-
20、coat plaster application.building construction joint, na designed division of a building that allows movement of all component parts of the building,in any plane, which may be caused by thermal, seismic, wind loading, or any other force. The construction of the separation isaccomplished by one of th
21、e following methods: (1) manufactured devices suitable for this application, or (2) by field fabricationof suitable materials.calcined gypsum, na dry powder; primarily calcium sulfate hemihydrate, resulting from calcination of gypsum; cementitiousbase for production of most gypsum plasters: also cal
22、led plaster of paris, sometimes called stucco.calcium sulfate, nthe chemical compound CaSO4.cementitious material, na material that, when mixed with water, with or without aggregate, provides the plasticity and thecohesive and adhesive properties necessary for placement, and the formation of a rigid
23、 mass.check cracking (in joint systems), nshort, narrow cracks randomly oriented in the surface of the dried joint compound.coat, na layer of plaster applied in a single bined water, nthe water chemically held, as water of crystallization, by the calcium sulfate dihydrate or hemihydrate pressive str
24、ength, nthe maximum load sustained by a standard specimen of a material when subjected to a crushing force.FIG. 1 Arris (of an Arch)C11 18b2consistency, na property of a material determined by the complete flow force relation. (C557)consistency (normal), nthe number of millilitres of water per 100 g
25、 of gypsum plaster or gypsum concrete required to producea mortar or a slurry of specified fluidity. (C472)control (expansion-contraction) joint, na designed separation in the system materials that allows for movement caused byexpansion or contraction of the system. The construction of the separatio
26、n is accomplished by one of the following methods:(1) manufactured devices suitable for this application, or (2) by field fabrication of suitable materials.core (of gypsum board), nthe hardened material filling the space between the face and back papers consisting substantially ofrehydrated gypsum w
27、ith additives.core (of gypsum panel products), nthe hardened material, consisting substantially of gypsum, with additives, that fills the spacebetween the face and the back of the gypsum panel product.cored tile or block,nsee gypsum tile or block. (C52)cornerbead, nan accessory for outside corners.c
28、orner reinforcement, exterior, na preformed section of wire or expanded sheet steel, for the reinforcement of exterior stuccoexternal corners (arrises).cure (portland cement plaster or stucco), v(1) to provide conditions conducive to the hydration process of portland cementplaster or stucco, or (2)
29、to maintain proper temperature and a sufficient quantity of water within the plaster to ensure cementhydration.density, nthe weight per unit volume of a material. (C472)dried sample, na sample devoid of free water.edge (of glass mat gypsum panels), nthe bound edge as manufactured.edge (of gypsum boa
30、rd), nthe paper-bound edge as manufactured.edge trim, nan accessory to cover exposed ends or edges of gypsum board.embedding compoundsee taping compound.end (of glass mat gypsum panels), nthe end perpendicular to the bound edge. The gypsum core is always exposed.end (of gypsum board), nthe end perpe
31、ndicular to the paper-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 to receive decoration or additional finishes.facer, na woven or nonwoven fabric or membrane on the surface of a gyp
32、sum board or gypsum panel product that is an integralpart of the product.featured edge, nan edge configuration of the paper bound edge of gypsum board that provides special design or performance.fineness modulus, nan empirical factor obtained by adding total percentages of a sample of aggregate reta
33、ined on each of aspecified series of sieves and dividing by 100. The sieve sizes 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 (4.75 mm), 38 in. (9.5 mm), 34 in. (19.0 mm), 112 in. (38.1 mm) and larger, increasingin the ratio of 2 to 1.finish coat
34、, nthe final layer of plaster applied over a basecoat or other substrate.finishing compound, n(sometimes called topping compound) a compound specifically formulated and manufactured for useover taping or all purpose compounds to provide a smooth and level surface for the application of decoration.fi
35、re-resistance classification, na standard rating of fire-resistance and protective characteristics of a building construction orassembly. (E119)flame spread classification, na standard rating of relative surface burning characteristics of a building material as compared toa standard material. (E84)f
36、lexural strength, nthe maximum load sustained by a standard specimen of a sheet material when subjected to a bending force.floating, vthe act of spreading, compacting, or consolidating to achieve a specified uniform appearance.C11 18b3framing member, nstud, plate, track, joist, furring, and other su
37、pport to which a gypsum panel product, or metal plaster baseis attached.free water, nall water contained by gypsum board or plaster in excess of that chemically held as water of crystallization.gauging plaster, na calcined gypsum plaster designed to be mixed with lime putty. (C28/C28M)glass mat, na
38、woven or non-woven fabric of glass fibers with or without a binder.glass mat gypsum panel, na gypsum panel product with glass mat facers.grout, ngypsum or portland cement plaster used to fill crevices or to fill hollow metal frames.gypsum, nthe mineral consisting primarily of fully hydrated calcium
39、sulfate, CaSO42H2O or calcium sulfate dihydrate.(C22/C22M)gypsum backing board, na 14 in. to 58 in. gypsum board for use as a backing for gypsum wallboard, acoustical tile, or otherdry cladding.water resistant gypsum backing boarda gypsum board designed for use on walls primarily as a base for the a
40、pplication ofceramic, or plastic tile.gypsum base forveneerplasters, na gypsum board used as the base for application of a gypsum veneer plaster. (C588/C588M)gypsum board, nthe generic name for a family of sheet products consisting of a noncombustible core primarily of gypsum withpaper surfacing.gyp
41、sum casting plaster, na calcined gypsum plaster used primarily to form objects, such as lamp bases, art ware, and novelties,and so forth. (C59/C59M)gypsum concrete, na calcined gypsum mixed with wood chips or aggregate, or both. (C317/C317M)gypsum core board, coreboard, na 34 in. (19.0 mm) to 1 in.
42、(25.4 mm) gypsum board consisting of a single board or factorylaminated multiple boards, used as a gypsum stud or core in semisolid or solid gypsum board partitions.gypsum formboard, na gypsum panel product used as the permanent form for poured gypsum roof decks. (C318/C318M)gypsum lath, na gypsum b
43、oard used as the base for application of gypsum plaster. (C37/C37M)perforated gypsum latha gypsum lath having perforations to provide mechanical keying of the basecoat plaster.foil-backed gypsum laththe same as plain gypsum lath except that in addition, the back surface shall be covered with acontin
44、uous sheet of pure bright finished aluminum foil.type X latha gypsum lath specially manufactured to provide specific fire-resistant characteristics.gypsum molding plaster, na calcined gypsum plaster used primarily for plaster casts or molds, sometimes used as a gaugingplaster. (C59/C59M, C28/C28M)gy
45、psum neat plaster, na calcined gypsum mixed at the mill with ingredients to control working quality and setting time.(C28/C28M)DISCUSSIONNeat plaster is either fibered or unfibered. The addition of aggregate is required on the job.gypsum panel products, nthe general name for a family of sheet produc
46、ts consisting essentially of gypsum.gypsum plaster, nthe generic name for a family of powdered cementitious products consisting primarily of calcined gypsumwith additives to modify physical characteristics, and having the ability, when mixed with water, to produce a plastic mortar orslurry which can
47、 be formed to the desired shape by various methods and will subsequently set to a hard, rigid mass. (C28/C28M)gypsum sheathing, ngypsum panel products specifically manufactured with enhanced water resistance for use as a substrate forexterior surface materials. (C1396/C1396M)gypsum tile or block, na
48、 cast gypsum building unit. (C52)gypsum veneer plaster systems, nveneer plaster applied in accordance with Specification C843 to gypsum base for veneerplasters.gypsum wallboard, na gypsum board used primarily as an interior surfacing for building structures. (C36/C36M)C11 18b4foil-backed gypsum wall
49、boarda gypsum wallboard with the back surface covered with a continuous sheet of pure brightfinished aluminum foil. (C36/C36M)type X gypsum wallboarda gypsum wallboard specially manufactured to provide specific fire-resistant characteristics(C36/C36M).gypsum wood-fibered plaster, na calcined gypsum plaster containing shredded or ground wood fiber added during manufacture.hemihydrate, nthe dry powder, calcium sulfate hemihydrate, resulting from calcination of C
