ASTM C11-07b

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Designation:C11–07b
Standard Terminology Relating to
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Gypsum and Related Building Materials and Systems
ThisstandardisissuedunderthefixeddesignationC 11;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginal
adoption or, in the case of revision, the year of last revision.Anumber in parentheses indicates the year of last reapproval.Asuperscript
epsilon (e) indicates an editorial change since the last revision or reapproval.
1. Scope* C 588/C 588M Specification for Gypsum Base for Veneer
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Plasters
1.1 This standard covers terminology relating to gypsum
C 1396/C 1396M Specification for Gypsum Board
and related building materials and systems. The terms are
E84 Test Method for Surface Burning Characteristics of
generically defined. More specific and expanded definitions
Building Materials
may appear in appropriate standards.
E 96/E 96M Test Methods for Water Vapor Transmission of
2. Referenced Documents
Materials
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E119 Test Methods for Fire Tests of Building Construction
2.1 ASTM Standards:
and Materials
C 22/C 22M Specification for Gypsum
E 337 Test Method for Measuring Humidity with a Psy-
C 28/C 28M Specification for Gypsum Plasters
chrometer (the Measurement of Wet- and Dry-Bulb Tem-
C35 Specification for Inorganic Aggregates for Use in
peratures)
Gypsum Plaster
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C 36/C 36M Specification for Gypsum Wallboard
3. Terminology
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C 37/C 37M Specification for Gypsum Lath
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C52 Specification for Gypsum Partition Tile or Block accelerator, n—a material that reduces setting time.
C 59/C 59M Specification for Gypsum Casting Plaster and accessories, n—products fabricated for the purpose of forming
Gypsum Molding Plaster corners, edges, control joints, or decorative effects.
C 61/C 61M Specification for Gypsum Keene’s Cement adhesive,n—asubstancecapableofholdingmaterialstogether
C 317/C 317M Specification for Gypsum Concrete by surface attachment.
C 318/C 318M Specification for Gypsum Formboard admixture, n—a material other than water, aggregates, hy-
C 472 Test Methods for Physical Testing of Gypsum, Gyp- draulic cementitious material, and fiber reinforcement that is
sum Plasters and Gypsum Concrete usedasaningredienttomodifypropertiesandisaddedtothe
C 473 Test Methods for Physical Testing of Gypsum Panel batch before or during its mixture.
Products aggregate, n—an inert granular material which may be added
C 475/C 475M Specification for Joint Compound and Joint to gypsum plasters. (C35)
Tape for Finishing Gypsum Board all purpose compound, n—a compound formulated and
C 843 Specification for Application of Gypsum Veneer manufactured to serve as a taping or finishing compound, or
Plaster both.
C 557 Specification for Adhesives for Fastening Gypsum anhydrite, n—the mineral consisting primarily of anhydrous
Wallboard to Wood Framing calcium sulfate, CaSO .
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C 587 Specification for Gypsum Veneer Plaster arris (of an arch), n—the outside corner or angle formed by
the meeting of a wall surface with the curved surface of an
arch (see Fig. 1).
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This terminology is under the jurisdiction of ASTM Committee C11 on
basecoat, n—the first layer or layers of plaster applied over
Gypsum and Related Building Materials and Systems and is the direct responsibility
lath or other substrate.
of Subcommittee C11.91 on Terminology and Editorial.
Current edition approved Nov. 1, 2007. Published December 2007. Originally
DISCUSSION—The first application is normally called a scratch coat
approved in 1916. Last previous edition approved in 2007 as C 11 – 07a.
and the second application is referred to as a brown coat.
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For referenced ASTM standards, visit the ASTM website, www.astm.org, or
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
bedding coat, n—that coat of plaster to receive aggregate or
Standards volume information, refer to the standard’s Document Summary page on
other decorative material of any size, impinged or embedded
the ASTM website.
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Withdrawn. into its surface, before it sets.
*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.
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C11–07b
by expansion or contraction of the system. The construction
of the separation is accomplished by one of the following
methods: (1) manufactured devices suitable for this applica-
tion, or (2) by field fabrication of suitable materials.
core (of gypsum board), n—the hardened material filling the
space between the face and back papers consisting substan-
tially of rehydrated gypsum with additives.
cored tile or block, n—see gypsum tile or block. (C52)
cornerbead, n—an accessory for outside corners.
corner reinforcement, exterior, n—a preformed section of
wire or expanded sheet steel, for the reinforcement of
exterior stucco ext
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