ASTM C474-15(2020)
(Test Method)Standard Test Methods for Joint Treatment Materials for Gypsum Board Construction
Standard Test Methods for Joint Treatment Materials for Gypsum Board Construction
ABSTRACT
These test methods cover the physical testing of joint treatment materials such as joint compound, paper joint tape, glass-mesh joint tape, and an assembly of joint compound and paper joint tape. These materials are used in gypsum board construction. The test methods are detailed for the following: joint compound tests—for viscosity, shrinkage, check cracking, and putrefaction; joint tape tests—for tensile strength, width, and thickness; paper joint tape tests—for dimensional stability; assemblages of paper joint tape and joint compound—for bond of paper joint tape to joint compound and cracking of joint compound at tape edges; and glass-mesh joint tape test—for skewness.
SCOPE
1.1 These test methods cover the physical testing of joint compound, paper joint tape, glass-mesh joint tape, and an assembly of joint compound and paper joint tape.
1.1.1 Joint treatment materials are specified in Specification C475/C475M.
1.1.2 The joint treatment material described in this standard are for use with gypsum board installed in accordance with Specification C840.
1.2 The test methods appear in the following order:
Joint Compound Tests:
Viscosity
5
Shrinkage
6
Check Cracking
7
Putrefaction
8
Joint Tape Tests:
Tensile Strength
9
Width
10
Thickness
11
Paper Joint Tape Tests:
Dimensional Stability
12
Assemblages of Paper Joint Tape and Joint Compound:
Bond of Paper Joint Tape to Joint Compound
15
Cracking of Joint Compound at Tape Edges
14
Glass-Mesh Joint Tape Test:
Skewness
13
1.3 The values stated in inch-pound units are to be regarded as standard. The values given in brackets are mathematical conversions to SI units that are provided for information only and are not considered standard.
1.4 The text of this standard references notes and footnotes that provide explanatory material. These notes and footnotes (excluding those in tables and figures) shall not be considered as requirements of the standard.
1.5 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety, health, and environmental practices and determine the applicability of regulatory limitations prior to use.
1.6 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.
General Information
Relations
Standards Content (Sample)
This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the
Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.
Designation: C474 − 15 (Reapproved 2020)
Standard Test Methods for
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Joint Treatment Materials for Gypsum Board Construction
This standard is issued under the fixed designation C474; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of last revision.Anumber in parentheses indicates the year of last reapproval.A
superscript epsilon (´) indicates an editorial change since the last revision or reapproval.
1. Scope 1.6 This international standard was developed in accor-
dance with internationally recognized principles on standard-
1.1 These test methods cover the physical testing of joint
ization established in the Decision on Principles for the
compound, paper joint tape, glass-mesh joint tape, and an
Development of International Standards, Guides and Recom-
assembly of joint compound and paper joint tape.
mendations issued by the World Trade Organization Technical
1.1.1 Joint treatment materials are specified in Specification
Barriers to Trade (TBT) Committee.
C475/C475M.
1.1.2 The joint treatment material described in this standard
2. Referenced Documents
are for use with gypsum board installed in accordance with
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Specification C840.
2.1 ASTM Standards:
1.2 The test methods appear in the following order: C11Terminology Relating to Gypsum and Related Building
Materials and Systems
Joint Compound Tests:
Viscosity 5
C472Test Methods for Physical Testing of Gypsum, Gyp-
Shrinkage 6
sum Plasters, and Gypsum Concrete
Check Cracking 7
C475/C475MSpecification for Joint Compound and Joint
Putrefaction 8
Joint Tape Tests:
Tape for Finishing Gypsum Board
Tensile Strength 9
C840SpecificationforApplicationandFinishingofGypsum
Width 10
Board
Thickness 11
Paper Joint Tape Tests:
C1396/C1396MSpecification for Gypsum Board
Dimensional Stability 12
D685Practice for Conditioning Paper and Paper Products
Assemblages of Paper Joint Tape and Joint Compound:
for Testing
Bond of Paper Joint Tape to Joint Compound 15
Cracking of Joint Compound at Tape Edges 14
D828Test Method for Tensile Properties of Paper and
Glass-Mesh Joint Tape Test:
PaperboardUsingConstant-Rate-of-ElongationApparatus
Skewness 13
D1000 Test Methods for Pressure-Sensitive Adhesive-
1.3 The values stated in inch-pound units are to be regarded
Coated Tapes Used for Electrical and ElectronicApplica-
as standard. The values given in brackets are mathematical
tions
conversions to SI units that are provided for information only
D3699Specification for Kerosine
and are not considered standard.
D3882Test Method for Bow and Skew in Woven and
1.4 The text of this standard references notes and footnotes
Knitted Fabrics
that provide explanatory material. These notes and footnotes
E100Specification for ASTM Hydrometers
(excluding those in tables and figures) shall not be considered
E177Practice for Use of the Terms Precision and Bias in
as requirements of the standard.
ASTM Test Methods
E691Practice for Conducting an Interlaboratory Study to
1.5 This standard does not purport to address all of the
Determine the Precision of a Test Method
safety concerns, if any, associated with its use. It is the
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responsibility of the user of this standard to establish appro-
2.2 TAPPI Standard:
priate safety, health, and environmental practices and deter-
T411 Thickness (Caliper) of Paper, Paperboard, and Com-
mine the applicability of regulatory limitations prior to use.
bined Board
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These test methods are under the jurisdiction of ASTM Committee C11 on
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Gypsum and Related Building Materials and Systems and are the direct responsi- For referenced ASTM standards, visit the ASTM website, www.astm.org, or
bility of Subcommittee C11.02 on Specifications and Test Methods forAccessories contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
and Related Products. Standards volume information, refer to the standard’s Document Summary page on
Current edition approved June 1, 2020. Published June 2020. Originally the ASTM website.
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approved in 1961. Last previous edition approved in 2015 as C474–15. DOI: Available from TechnicalAssociation of the Pulp and Paper Industry, Technol-
10.1520/C0474-15R20. ogy Park, P.O. Box 105113, Atlanta, GA 30348.
*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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C474 − 15 (2020)
3. Terminology 5.2.1 Sampling shall be in accordance with Specification
C475/C475M.
3.1 Definitions—For definitions of terms relating to
gypsum, see Terminology C11. 5.3 Specimen Preparation:
3.2 Definiti
...
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