ASTM C11-07

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Designation:C11–07
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
E84 Test Method for Surface Burning Characteristics of
and related building materials and systems. The terms are
Building Materials
generically defined. More specific and expanded definitions
E 96/E 96M Test Methods for Water Vapor Transmission of
may appear in appropriate standards.
Materials
2. Referenced Documents
E119 Test Methods for Fire Tests of Building Construction
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and Materials
2.1 ASTM Standards:
E 337 Test Method for Measuring Humidity with a Psy-
C 22/C 22M Specification for Gypsum
chrometer (the Measurement of Wet- and Dry-Bulb Tem-
C 28/C 28M Specification for Gypsum Plasters
peratures)
C35 Specification for Inorganic Aggregates for Use in
Gypsum Plaster
3. Terminology
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C 36/C 36M Specification for Gypsum Wallboard
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C 37/C 37M Specification for Gypsum Lath accelerator, n—a material that reduces setting time.
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C52 Specification for Gypsum Partition Tile or Block accessories, n—products fabricated for the purpose of forming
C 59/C 59M Specification for Gypsum Casting Plaster and corners, edges, control joints, or decorative effects.
Gypsum Molding Plaster adhesive,n—asubstancecapableofholdingmaterialstogether
C 61/C 61M Specification for Gypsum Keene’s Cement by surface attachment.
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C 79/C 79M Specification for Gypsum Sheathing Board admixture, n—a material other than water, aggregates, hy-
C 317/C 317M Specification for Gypsum Concrete draulic cementitious material, and fiber reinforcement that is
C 318/C 318M Specification for Gypsum Formboard usedasaningredienttomodifypropertiesandisaddedtothe
C 472 Test Methods for Physical Testing of Gypsum, Gyp- batch before or during its mixture.
sum Plasters and Gypsum Concrete aggregate, n—an inert granular material which may be added
C 473 Test Methods for Physical Testing of Gypsum Panel to gypsum plasters. (C35)
Products all purpose compound, n—a compound formulated and
C 475/C 475M Specification for Joint Compound and Joint manufactured to serve as a taping or finishing compound, or
Tape for Finishing Gypsum Board both.
C 843 Specification for Application of Gypsum Veneer anhydrite, n—the mineral consisting primarily of anhydrous
Plaster calcium sulfate, CaSO .
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C 557 Specification for Adhesives for Fastening Gypsum arris (of an arch), n—the outside corner or angle formed by
Wallboard to Wood Framing the meeting of a wall surface with the curved surface of an
C 587 Specification for Gypsum Veneer Plaster arch (see Fig. 1).
basecoat, n—the first layer or layers of plaster applied over
lath or other substrate.
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This terminology is under the jurisdiction of ASTM Committee C11 on
DISCUSSION—The first application is normally called a scratch coat
Gypsum and Related Building Materials and Systems and is the direct responsibility
of Subcommittee C11.91 on Terminology and Editorial. and the second application is referred to as a brown coat.
Current edition approved May 1, 2007. Published June 2007. Originally
bedding coat, n—that coat of plaster to receive aggregate or
approved in 1916. Last previous edition approved in 2006 as C 11 – 06.
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For referenced ASTM standards, visit the ASTM website, www.astm.org, or
other decorative material of any size, impinged or embedded
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
into its surface, before it sets.
Standards volume information, refer to the standard’s Document Summary page on
bond plaster, n—a calcined gypsum plaster specially formu-
the ASTM website.
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Withdrawn. lated for application over rough monolithic concrete as a
*A Summary of Changes section appears at the end of this standard.
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C11–07
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 external corners (arrises).
cure (portland cement plaster or stucco), v—(1) to provide
conditions conducive to the hydration process of portland
cement plaster or stucco, or (2) to
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