ASTM C473-09

Standard Test Methods for Physical Testing of Gypsum Panel Products

ABSTRACT
These test methods cover the physical testing of gypsum panel products. The test methos appear in the following order: (1) flexural strength (Method A); (2) core, end, and edge hardness (Method A); (3) nail pull resistance (Method A); (4) humidified deflection; (5) end squareness; (6) nominal thickness; (7) recessed- or tapered-edge depth; (8) width; (9) length; (10) water resistance of core-treated water repellant gypsum panel products; and (11) surface water resistance of gypsum panel products with water-repellant surfaces. For use in these test methods, a sample shall consist of gypsum panel products. Flexural properties of gypsum panel products are evaluated by supporting the specimen near the ends and applying a transverse load midway between the supports. The core, end, and edge hardness of gypsum panel products is evaluated by determining the force required to push a steel punch into the area of test. The ability of gypsum panel products to resist nail pull-through is evaluated by determining the loaded required to push a standard nail head through the product. The humidified deflection of gypsum panel products is evaluated by supporting a specimen that has been cut with the long dimension perpendicular to the machine detection, supported horizontally, and subjected to high humidity.
SCOPE
1.1 These test methods cover the physical testing of gypsum panel products.
1.2 The test methods appear in the following order:
Section Flexural Strength (Method A) 7 Core, End and Edge Hardness (Method A) 8 Nail Pull Resistance (Method A) 9 Flexural Strength (Method B)11 Core, End and Edge Hardness (Method B)12 Nail Pull Resistance (Method B)13 Humidified Deflection14 End Squareness15 Nominal Thickness16 Recessed- or Tapered Edge Depth17 Width18 Length19 Water Resistance of Core-Treated Water-Repellent
Gypsum Panel Products
20 Surface Water Resistance of Gypsum Panel Products
with Water-Repellent Surfaces
21
1.3 The values stated in inch-pound units are to be regarded as standard. The values given in parentheses are mathematical conversions to SI units that are provided for information only and are not considered standard.
1.4 The text of these test methods 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 these test methods.
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-Aug-2009
• 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: C11.01 - Specifications and Test Methods for Gypsum Products

Relations

• Replaces: ASTM C473-07 - Standard Test Methods for Physical Testing of Gypsum Panel Products
• Effective Date: 01-Sep-2009
• Replaced By: ASTM C473-10 - Standard Test Methods for Physical Testing of Gypsum Panel Products
• Effective Date: 15-May-2010
• Referred By: ASTM C11-23 - Standard Terminology Relating to Gypsum and Related Building Materials and Systems
• Effective Date: 01-Sep-2009
• Referred By: ASTM C1178/C1178M-18 - Standard Specification for Coated Glass Mat Water-Resistant Gypsum Backing Panel
• Effective Date: 01-Sep-2009
• Referred By: ASTM C1766-15(2019) - Standard Specification for Factory-Laminated Gypsum Panel Products
• Effective Date: 01-Sep-2009
• Referred By: ASTM C318/C318M-13(2018) - Standard Specification for Gypsum Formboard
• Effective Date: 01-Sep-2009
• Referred By: ASTM C1278/C1278M-17 - Standard Specification for Fiber-Reinforced Gypsum Panel
• Effective Date: 01-Sep-2009
• Referred By: ASTM C1629/C1629M-23 - Standard Classification for Abuse-Resistant Nondecorated Interior Gypsum Panel Products and Fiber-Reinforced Cement Panels
• Effective Date: 01-Sep-2009
• Referred By: ASTM C587-04(2018) - Standard Specification for Gypsum Veneer Plaster
• Effective Date: 01-Sep-2009
• Referred By: ASTM C1177/C1177M-17 - Standard Specification for Glass Mat Gypsum Substrate for Use as Sheathing
• Effective Date: 01-Sep-2009
• Referred By: ASTM C1355/C1355M-96(2020) - Standard Specification for Glass Fiber Reinforced Gypsum Composites
• Effective Date: 01-Sep-2009
• Referred By: ASTM C1396/C1396M-17 - Standard Specification for Gypsum Board
• Effective Date: 01-Sep-2009
• Referred By: ASTM C1658/C1658M-19e1 - Standard Specification for Glass Mat Gypsum Panels
• Effective Date: 01-Sep-2009
• Referred By: ASTM C1789-14(2018) - Standard Test Method for Calibration of Hand-Held Moisture Meters on Gypsum Panels
• Effective Date: 01-Sep-2009

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: C473 – 09
Standard Test Methods for
1
Physical Testing of Gypsum Panel Products
This standard is issued under the fixed designation C473; 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* C11 TerminologyRelatingtoGypsumandRelatedBuilding
Materials and Systems
1.1 These test methods cover the physical testing of gypsum
D3285 Test Method for Water Absorptiveness of Nonbibu-
panel products.
lous Paper and Paperboard (Cobb Test)
1.2 The test methods appear in the following order:
E4 Practices for Force Verification of Testing Machines
Section
E177 Practice for Use of the Terms Precision and Bias in
Flexural Strength (Method A) 7
Core, End and Edge Hardness (Method A) 8
ASTM Test Methods
Nail Pull Resistance (Method A) 9
E691 Practice for Conducting an Interlaboratory Study to
Flexural Strength (Method B) 11
Determine the Precision of a Test Method
Core, End and Edge Hardness (Method B) 12
Nail Pull Resistance (Method B) 13
Humidified Deflection 14
3. Terminology
End Squareness 15
3.1 Definitions used in these test methods are in accordance
Nominal Thickness 16
Recessed- or Tapered Edge Depth 17
with Terminology C11.
Width 18
3.2 Definitions of Terms Specific to This Standard:
Length 19
3.2.1 edge, n—the paper-bound edge, or long edge, as
Water Resistance of Core-Treated Water-Repellent
Gypsum Panel Products 20
manufactured.
Surface Water Resistance of Gypsum Panel Products
3.2.2 ends, n—the end perpendicular to the paper-bound
with Water-Repellent Surfaces 21
edge or long edge.
1.3 The values stated in inch-pound units are to be regarded
as standard. The values given in parentheses are mathematical 4. Sampling
conversions to SI units that are provided for information only
4.1 For use in these test methods, a sample shall consist of
and are not considered standard.
not less than 0.25 % of the number of gypsum panel products
1.4 The text of these test methods references notes and
in a shipment, but not less than three gypsum panel products.
footnotes that provide explanatory material. These notes and
Test specimens shall be taken from the sample lot as indicated
footnotes, excluding those in tables and figures, shall not be
in each method.
considered as requirements of these test methods.
1.5 This standard does not purport to address all of the 5. Conditioning
safety concerns, if any, associated with its use. It is the
5.1 Conditionspecimenstoconstantweightatatemperature
responsibility of the user of this standard to establish appro-
of 85 6 15 °F (29.5 6 8.5 °C) and relative humidity of 50 6
priate safety and health practices and determine the applica-
2% (Note 1). Test specimens individually after constant
bility of regulatory limitations prior to use.
weight is reached and within 10 min upon removal from the
conditioning chamber.
2. Referenced Documents
2
NOTE 1—Laboratory test results indicated that conditioning tempera-
2.1 ASTM Standards:
tures may range from 70 to 100 °F (21 to 38 °C) without significantly
affecting the results. However, relative humidity is critical. This is the
1
reason for testing specimens within 10 min upon removal from the
These test methods are under the jurisdiction of ASTM Committee C11 on
conditioning chamber.
Gypsum and Related Building Materials and Systems and are the direct responsi-
bility of Subcommittee C11.01 on Specifications and Test Methods for Gypsum
Products.
Current edition approved Sept. 1, 2009. Published September 2009. Originally
approved in 1961. Last previous edition approved in 2007 as C473 – 07. DOI:
10.1520/C0473-09.
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
contact ASTM 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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C473 – 09
Method A—Constant Rate of Loading the specimen at one half of the specimen width and one half of
the distance between the supports.
INTRODUCTION
7.4 Sampling—Sampling shall be in accordance with Sec-
The following procedures are applicable to so-called “shot
tion 4.
machines” that utilize lead or steel shot that applies a load to 7.5 Test Specimens:
the specimen at a constant stress rate or any other device that
7.5.1 Cut four specimens, each 12 in. (305 mm) by approxi-
applies the load at a constant stress rate. mately16in.(406mm)f
...

This document is not an ASTM standard and is intended only to provide the user of an ASTM 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:C473–10 Designation: C473 – 07
Standard Test Methods for
1
Physical Testing of Gypsum Panel Products
This standard is issued under the fixed designation C473; 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 gypsum panel products.
1.2 The test methods appear in the following order:
Section
Flexural Strength (Method A) 7
Core, End and Edge Hardness (Method A) 8
Nail Pull Resistance (Method A) 9
Flexural Strength (Method B) 11
Core, End and Edge Hardness (Method B) 12
Nail Pull Resistance (Method B) 13
Humidified Deflection 14
End Squareness 15
Nominal Thickness 16
Recessed- or Tapered Edge Depth 17
Width 18
Length 19
Water Resistance of Core-Treated Water-Repellent
Gypsum Panel Products 20
Surface Water Resistance of Gypsum Panel Products
with Water-Repellent Surfaces 21
1.3The values stated in inch-pound units are to be regarded as standard. The values given in parentheses are mathematical
conversions to SI units that are provided for information only and are not considered standard.
1.4The text of these test methods 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 these test methods.
1.5
1.3 The text of these test methods 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 these test methods.
1.4 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
D3285 Test Method for Water Absorptiveness of Nonbibulous Paper and Paperboard (Cobb Test)
E4 Practices for Force Verification of Testing Machines
E177Practice for Use of the Terms Precision and Bias in ASTM Test Methods
E691Practice for Conducting an Interlaboratory Study to Determine the Precision of a Test Method Practices for Force
Verification of Testing Machines
3. Terminology
3.1 Definitions used in these test methods are in accordance with Terminology C11.
3.2 Definitions of Terms Specific to This Standard:
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 C11.01 on Specifications and Test Methods for Gypsum Products.
Current edition approved May 15, 2010. Published June 2010. Originally approved in 1961. Last previous edition approved in 2009 as C473–09. DOI: 10.1520/C0473-10.
Current edition approved July 1, 2007. Published July 2007. Originally approved in 1961. Last previous edition approved in 2006 as C473 – 06a. DOI: 10.1520/C0473-09.
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

---------------------- Page: 1 ----------------------
C473 – 07
3.2.1 edge, n—the paper-bound edge, or long edge, as manufactured.
3.2.2 ends, n—the end perpendicular to the paper-bound edge or long edge.
4. Sampling
4.1 For use in these test methods, a sample shall consist of not less than 0.25 % of the number of gypsum panel products in
a shipment, but not less than three gypsum panel products. Test specimens shall be taken from the sample lot as indicated in each
method.
5. Conditioning
5.1 Condition specimens to constant weight at a temperature of 85 6 15 °F (29.5 6 8.5 °C) and relative humidity of 50 62%
(Note 1). Test specimens individually after constant weight is reached and within 10 min upon removal from the conditioning
chamber.
NOTE 1—Laboratory test results indicated that conditioning temperatures may range from 70 to 100 °F
...