ASTM C473-07
(Test Method)Standard Test Methods for Physical Testing of Gypsum Panel Products
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:
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.
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.
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Standards Content (Sample)
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Designation: C 473 – 07
Standard Test Methods for
1
Physical Testing of Gypsum Panel Products
This standard is issued under the fixed designation C 473; 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.
1. Scope* lous Paper and Paperboard (Cobb Test)
E4 Practices for Force Verification of Testing Machines
1.1 These test methods cover the physical testing of gypsum
panel products.
3. Terminology
1.2 The test methods appear in the following order:
3.1 Definitions used in these test methods are in accordance
Section
with TerminologyC11.
Flexural Strength (Method A) 7
Core, End and Edge Hardness (Method A) 8
3.2 Definitions of Terms Specific to This Standard:
Nail Pull Resistance (Method A) 9
3.2.1 edge, n—the paper-bound edge, or long edge, as
Flexural Strength (Method B) 11
manufactured.
Core, End and Edge Hardness (Method B) 12
Nail Pull Resistance (Method B) 13
3.2.2 ends, n—the end perpendicular to the paper-bound
Humidified Deflection 14
edge or long edge.
End Squareness 15
Nominal Thickness 16
4. Sampling
Recessed- or Tapered Edge Depth 17
Width 18
4.1 For use in these test methods, a sample shall consist of
Length 19
not less than 0.25 % of the number of gypsum panel products
Water Resistance of Core-Treated Water-Repellent
Gypsum Panel Products 20
in a shipment, but not less than three gypsum panel products.
Surface Water Resistance of Gypsum Panel Products
Test specimens shall be taken from the sample lot as indicated
with Water-Repellent Surfaces 21
in each method.
1.3 The text of these test methods references notes and
footnotes that provide explanatory material. These notes and 5. Conditioning
footnotes, excluding those in tables and figures, shall not be
5.1 Conditionspecimenstoconstantweightatatemperature
considered as requirements of these test methods.
of 85 6 15 °F (29.5 6 8.5 °C) and relative humidity of 50 6
1.4 This standard does not purport to address all of the
2% (Note 1). Test specimens individually after constant
safety concerns, if any, associated with its use. It is the
weight is reached and within 10 min upon removal from the
responsibility of the user of this standard to establish appro-
conditioning chamber.
priate safety and health practices and determine the applica-
NOTE 1—Laboratory test results indicated that conditioning tempera-
bility of regulatory limitations prior to use.
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
2. Referenced Documents
reason for testing specimens within 10 min upon removal from the
2
2.1 ASTM Standards:
conditioning chamber.
C11 Terminology Relating to Gypsum and Related Build-
Method A—Constant Rate of Loading
ing Materials and Systems
D 3285 Test Method for WaterAbsorptiveness of Nonbibu-
INTRODUCTION
The following procedures are applicable to so-called “shot
1
These test methods are under the jurisdiction of ASTM Committee C11 on
machines” that utilize lead or steel shot that applies a load to
Gypsum and Related Building Materials and Systems and are the direct responsi-
the specimen at a constant stress rate or any other device that
bility of Subcommittee C11.01 on Specifications and Test Methods for Gypsum
applies the load at a constant stress rate.
Products.
Current edition approved July 1, 2007. Published July 2007. Originally approved
6. Apparatus—Method A
in 1961. Last previous edition approved in 2006 as C 473 – 06a.
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
6.1 Testing Machine—Apply the test load at a uniform rate
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
of 1 lbf/s (4.45 N/s) 610 %. Apply the load with a device
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.
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C473–07
independent of manual control of the rate of loading during an ends and edges of the gypsum panel product except where the
individual sample test (see Fig. 1). The deformation of the product is 24-in. or less in width, where it is impossible to do
specimen controls the cross head speed. so.
7.5.2 Condition specimens in accordance with Section 5.
7.6 Procedure:
7. Flexural Strength (Method A)
7.6.1 Use the apparatus in 7.3, supporting each specimen
7.1 Summary of Test Method—Flexural properties of gyp-
centrally on the fixed paral
...
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