ASTM C474-12

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:
Section 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 Stability12 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  Skewness13
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 and health practices and determine the applicability of regulatory limitations prior to use.

General Information

• Status: Historical
• Publication Date: 31-Dec-2011
• 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 C474-11 - Standard Test Methods for Joint Treatment Materials for Gypsum Board Construction
• Effective Date: 01-Jan-2012
• Replaced By: ASTM C474-13 - Standard Test Methods for Joint Treatment Materials for Gypsum Board Construction
• Effective Date: 01-May-2013
• Referred By: ASTM C475/C475M-17(2022) - Standard Specification for Joint Compound and Joint Tape for Finishing Gypsum Board
• Effective Date: 01-Jan-2012

Standards Content (Sample)

NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.
Contact ASTM International (www.astm.org) for the latest information
Designation: C474 − 12
StandardTest Methods for
1
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* 2. Referenced Documents
2
1.1 These test methods cover the physical testing of joint 2.1 ASTM Standards:
compound, paper joint tape, glass-mesh joint tape, and an C11Terminology Relating to Gypsum and Related Building
assembly of joint compound and paper joint tape. Materials and Systems
1.1.1 Joint treatment materials are specified in Specification C472Test Methods for Physical Testing of Gypsum, Gyp-
C475/C475M. sum Plasters and Gypsum Concrete
1.1.2 The joint treatment material described in this standard C475/C475MSpecification for Joint Compound and Joint
are for use with gypsum board installed in accordance with Tape for Finishing Gypsum Board
Specification C840. C840SpecificationforApplicationandFinishingofGypsum
Board
1.2 The test methods appear in the following order:
C1396/C1396MSpecification for Gypsum Board
Section
D685Practice for Conditioning Paper and Paper Products
Joint Compound Tests:
3
Viscosity 5 for Testing (Withdrawn 2010)
Shrinkage 6
D828Test Method for Tensile Properties of Paper and
Check Cracking 7
PaperboardUsingConstant-Rate-of-ElongationApparatus
Putrefaction 8
3
Joint Tape Tests: (Withdrawn 2009)
Tensile Strength 9
D3699Specification for Kerosine
Width 10
D3882Test Method for Bow and Skew in Woven and
Thickness 11
Paper Joint Tape Tests
Knitted Fabrics
Dimensional Stability 12
E100Specification for ASTM Hydrometers
Assemblages of Paper Joint Tape and Joint Compound:
2.2 TAPPI Standard:
Bond of Paper Joint Tape to Joint Compound 15
Cracking of Joint Compound at Tape Edges 14 T411 Thickness (Caliper) of Paper, Paperboard, and Com-
4
Glass-Mesh Joint Tape Test
bined Board
Skewness 13
1.3 The values stated in inch-pound units are to be regarded 3. Terminology
as standard. The values given in brackets are mathematical
3.1 Definitions—For definitions of terms relating to
conversions to SI units that are provided for information only
gypsum, see Terminology C11.
and are not considered standard.
3.2 Definitions of Terms Specific to This Standard:
1.4 The text of this standard references notes and footnotes 3.2.1 bond, n—in joint systems, the quality of adhesion
that provide explanatory material. These notes and footnotes between the paper joint tape and joint compound.
(excluding those in tables and figures) shall not be considered 3.2.1.1 Discussion—% bond means that no paper fiber is
as requirements of the standard. adheringtothejointcompound.A100%bondmeansthatthere
is cohesive failure of the paper joint tape.
1.5 This standard does not purport to address all of the
safety concerns, if any, associated with its use. It is the 3.2.2 check cracking, n—in joint systems, short, narrow
responsibility of the user of this standard to establish appro- cracks randomly oriented in the surface of the dried joint
priate safety and health practices and determine the applica- compound.
bility of regulatory limitations prior to use.
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
1
These test methods are under the jurisdiction of ASTM Committee C11 on contact ASTM Customer Service at [e-mail]. For Annual Book of ASTM
Gypsum and Related Building Materials and Systems and are the direct responsi- Standards volume information, refer to the standard’s Document Summary page on
bility of Subcommittee C11.02 on Specifications and Test Methods forAccessories the ASTM website.
3
and Related Products. The last approved version of this historical standard is referenced on
Current edition approved Jan. 1, 2012. Published February 2012. Originally www.astm.org.
4
approved in 1961. Last previous edition approved in 2011 as C474–11. DOI: Available from TechnicalAssociation of the Pulp and Paper Industry, Technol-
10.1520/C0474-12. 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
1

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C474 − 12
5
3.2.3 joint compound, powder, n—Adrying-type or setting- 5.4.2 Viscometer , adjusted to operate at 78 6 1 r/min, and
type cementitious material to be mixed with water. with a 250 cm-g sensitivity cartridge.
5.4.3 Viscometer Pin, having dimensions as follows:
3.2.4 joint compound, ready-mix, n—A drying-type cemen-
in. [mm]
titious material that is facto
...

This document is not anASTM standard and is intended only to provide the user of anASTM standard an indication of what changes have been made to the previous version. Because
it may not be technically possible to adequately depict all changes accurately, ASTM recommends that users consult prior editions as appropriate. In all cases only the current version
of the standard as published by ASTM is to be considered the official document.
Designation:C474–11 Designation:C474–12
Standard Test Methods for
1
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. A number in parentheses indicates the year of last reapproval. A
superscript epsilon (´) indicates an editorial change since the last revision or reapproval.
1. 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:
Section
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 and health practices and determine the applicability of regulatory
limitations prior to use.
2. Referenced Documents
2
2.1 ASTM Standards:
C11 Terminology Relating to Gypsum and Related Building Materials and Systems
C472 Test Methods for Physical Testing of Gypsum, Gypsum Plasters and Gypsum Concrete
C475/C475M Specification for Joint Compound and Joint Tape for Finishing Gypsum Board
C840 Specification for Application and Finishing of Gypsum Board
C1396/C1396M Specification for Gypsum Board
D685 Practice for Conditioning Paper and Paper Products for Testing
D828 Test Method for Tensile Properties of Paper and Paperboard Using Constant-Rate-of-Elongation Apparatus
D3699 Specification for Kerosine
D3882 Test Method for Bow and Skew in Woven and Knitted Fabrics
1
These test methods are under the jurisdiction of ASTM Committee C11 on Gypsum and Related Building Materials and Systems and are the direct responsibility of
Subcommittee C11.02 on Specifications and Test Methods for Accessories and Related Products.
Current edition approved MarchJan. 1, 2011.2012. Published March 2011.February 2012. Originally approved in 1961. Last previous edition approved in 20052011 as
C474–05.C474 – 11. DOI: 10.1520/C0474-112.
2
For referencedASTM standards, visit theASTM website, www.astm.org, or contactASTM Customer Service at [e-mail]. For Annual Book of ASTM Standards
volume information, refer to the standard’s Document Summary page on the ASTM website.
*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.
1

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C474–12
E100 Specification for ASTM Hydrometers
2.2 TAPPI Standard:
3
T 411 Thickness (Caliper) of Paper, Paperboard, and Combined Board
3. Terminology
3.1 Definitions—For definitions of terms relating to gypsum, see Terminology C11.
3.2 Definitions of Terms Specific to This Standard:
3.2.1 bond, n—in joint systems, the quality of adhesion between the paper joint tape and joint compound.
3.2.1.1 Discussion—A0 % bond means that no paper fiber is adhering to the joint compound. A100 % bond means that there
is cohesive failure of the paper joint tape.
3.2.2 check cracking, n—in joint systems, short, narrow cracks randomly oriented in the surface of the dried joint compound.
3.2.3 joint compound, powder, n—A drying-type or setting-type cementitious material to be mixed with water.
3.2.4 joint compound, ready-mix, n—A drying-type cementitious material that is factory mixed in ready-to-use form.
4. Specimen Preparation
4.1
...