ASTM C474-01

Standard Test Methods for Joint Treatment Materials for Gypsum Board Construction

SCOPE
1.1 These test methods cover the physical testing of joint compound, paper joint tape, and an assembly of joint compound and paper joint tape.
1.1.1 Joint treatment materials are specified in Specification C 475.
1.2 The test methods appear in the following order: SectionJoint Compound Tests:Viscosity 5Shrinkage 6Check Cracking 7Putrefaction 8Paper Joint Tape Tests:Tensile Strength 9Dimensional Stability 10Width 11Thickness 12Assemblages of Paper Joint Tape and Joint Compound:Bond of Paper Joint Tape to Joint Compound 13Cracking of Joint Compound at Tape Edges 14
1.3 The values stated in inch-pound units are to be regarded as the standard. The SI (metric) values given in parentheses are approximate and are provided for information purposes only.
1.4 The text of this standard references notes and footnotes which 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 and health practices and determine the applicability of regulatory limitations prior to use.

General Information

• Status: Historical
• Publication Date: 09-Jun-2001
• ICS: 91.060.10 - Walls. Partitions. Facades
• ICS: 91.100.10 - Cement. Gypsum. Lime. Mortar
• Technical Committee: C11 - Gypsum and Related Building Materials and Systems
• Drafting Committee: C11.02 - Specifications and Test Methods for Accessories and Related Products

Relations

• Replaces: ASTM C474-97 - Standard Test Methods for Joint Treatment Materials for Gypsum Board Construction
• Effective Date: 10-Jun-2001
• Replaced By: ASTM C474-02 - Standard Test Methods for Joint Treatment Materials for Gypsum Board Construction
• Effective Date: 10-Dec-2002
• Referred By: ASTM C475/C475M-17(2022) - Standard Specification for Joint Compound and Joint Tape for Finishing Gypsum Board
• Effective Date: 10-Jun-2001

Standards Content (Sample)

Designation:C474–01
Standard Test Methods for
1
Joint Treatment Materials for Gypsum Board Construction
This standard is issued under the fixed designation C 474; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of last revision. A number in parentheses indicates the year of last reapproval. A
superscript epsilon (e) indicates an editorial change since the last revision or reapproval.
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1. Scope sum Plasters, and Gypsum Concrete
C 475 Specification for Joint Compound and Joint Tape for
1.1 These test methods cover the physical testing of joint
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Finishing Gypsum Board
compound, paper joint tape, and an assembly of joint com-
D 685 Practice for Conditioning Paper and Paper Products
pound and paper joint tape.
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for Testing
1.1.1 Joint treatment materials are specified in Specification
D 828 Test Method for Tensile Properties of Paper and
C 475.
Paperboard Using Constant Rate-of-Elongation Appara-
1.2 The test methods appear in the following order:
3
tus
Section
4
E 100 Specification for ASTM Hydrometers
Joint Compound Tests:
Viscosity 5
2.2 TAPPI Standard:
Shrinkage 6
T 410 Grammage of Paper and Paperboard (Weight Per
Check Cracking 7
5
Unit Area)
Putrefaction 8
Paper Joint Tape Tests:
Tensile Strength 9
3. Terminology
Dimensional Stability 10
3.1 Definitions—For definitions of terms relating to gyp-
Width 11
Thickness 12
sum, see Terminology C 11.
Assemblages of Paper Joint Tape and Joint Compound:
3.2 Definitions of Terms Specific to This Standard:
Bond of Paper Joint Tape to Joint Compound 13
3.2.1 bond, n—in joint systems, the quality of adhesion
Cracking of Joint Compound at Tape Edges 14
between the paper joint tape and joint compound.
1.3 The values stated in inch-pound units are to be regarded
3.2.1.1 Discussion—A 0 % bond means that no paper fiber
as the standard.The SI (metric) values given in parentheses are
is adhering to the joint compound. A 100 % bond means that
approximate and are provided for information purposes only.
there is cohesive failure of the paper joint tape.
1.4 The text of this standard references notes and footnotes
3.2.2 check cracking, n—in joint systems, short, narrow
which provide explanatory material. These notes and footnotes
cracks randomly oriented in the surface of the dried joint
(excluding those in tables and figures) shall not be considered
compound.
as requirements of the standard.
3.2.3 joint compound, powder, n—Adrying-type or setting-
1.5 This standard does not purport to address all of the
type cementitious material to be mixed with water.
safety concerns, if any, associated with its use. It is the
3.2.4 joint compound, ready-mix, n—A drying-type cemen-
responsibility of the user of this standard to establish appro-
titious material that is factory mixed in ready-to-use form.
priate safety and health practices and determine the applica-
bility of regulatory limitations prior to use.
4. Specimen Preparation
4.1 Joint Compound, Powder:
2. Referenced Documents
4.1.1 Mix 300 g of joint compound, powder, with approxi-
2.1 ASTM Standards:
mately 150 to 160 mL of water.
C 11 Terminology Relating to Gypsum and Related Build-
4.1.2 Allow the specimen to stand for 30 min (Note 1),
2
ing Materials and Systems
remix and adjust the temperature to 77 6 2°F (25 6 1°C) by
2
C 36 Specification for Gypsum Wallboard
placing the container holding the specimen in warm or cool
C 472 Test Methods for Physical Testing of Gypsum, Gyp-
water.
NOTE 1—Allow setting type compounds to stand for one half of their
1
These test methods are under the jurisdiction of ASTM Committee C11 on
Gypsum and Related Building Materials and Systems and are the direct responsi-
bility of Subcommittee C11.02 on Specifications and Test Methods for Accessories
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and Related Products. Annual Book of ASTM Standards, Vol 15.09.
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Current edition approved June 10, 2001. Published June 2001. Originally Annual Book of ASTM Standards, Vol 14.03.
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published as C 474 – 61. Last previous edition C 474 – 97. Available from TechnicalAssociation of the Pulp and Paper Industry, Technol-
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Annual Book of ASTM Standards, Vol 04.01. ogy Park, P.O. Box 105113, Atlanta, GA 30348.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.
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C474–01
setting times, as determined by Test Methods C 472 but not more than 30
5.5.2 Lock the filled container in the center of the viscom-
min, prior to remixing.
eter spindle platform. Raise the platform until the level of the
specimen reaches the mark on the viscometer pin and lock the
4.1.3 Measure the viscosity in accordance with Section 5.
platform in place.
4.1.4 If the measured viscosity is not between 480 and 520
5.5.3 Start the viscometer. Read the viscosity after the pen
Brabender units, repeat 4.1.1-4.1.3 through with an increase or
starts to trace a straight line (usually within 1 min). If the
decrease
...