ASTM C473-00
(Test Method)Standard Test Methods for Physical Testing of Gypsum Panel Products
Standard Test Methods for Physical Testing of Gypsum Panel Products
SCOPE
1.1 These test methods cover the physical testing of gypsum board products and gypsum lath.
1.2 The test methods appear in the following order: Sections Flexural Strength (Method A) 4 to 8 Core, End, and Edge Hardness (Method A) 9 to 17 Nail Pull Resistance (Method A) 18 to 23 Flexural Strength (Method B) 25 to 32 Core, End, and Edge Hardness (Method B) 33 to 40 Nail Pull Resistance (Method B) 41 to 48 Humidified Deflection 49 to 53 End Squareness 54 to 56 Nominal Thickness 57 to 61 Recessed- or Tapered-Edge Depth 62 to 66 Width 67 to 71 Length 72 to 76 Water Resistance of Core-Treated Water-Repellent Gypsum Boards 77 to 81 Surface Water Resistance of Gypsum Boards with Water- Repellent Face Paper 82 to 86
1.3 The values stated in inch-pound units are to be regarded as the standard. The values in parentheses are for information only.
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.
General Information
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Standards Content (Sample)
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Contact ASTM International (www.astm.org) for the latest information.
Designation: C 473 – 00
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 * with Terminology C 11.
3.2 Definitions of Terms Specific to This Standard:
1.1 These test methods cover the physical testing of gypsum
3.2.1 edge, n—the paper-bound edge, or long edge, as
panel products.
manufactured.
1.2 The test methods appear in the following order:
3.2.2 ends, n—the end perpendicular to the paper-bound
Section
edge or long edge.
Flexural Strength (Method A) 7
Core, End and Edge Hardness (Method A) 8
Nail Pull Resistance (Method A) 9
4. Sampling
Flexural Strength (Method B) 11
4.1 For use in these test methods, a sample shall consist of
Core, End and Edge Hardness (Method B) 12
Nail Pull Resistance (Method B) 13
not less than 0.25 % of the number of gypsum panel products
Humidified Deflection 14
in a shipment, but not less than three gypsum panel products.
End Squareness 15
Test specimens shall be taken from the sample lot as indicated
Nominal Thickness 16
Recessed- or Tapered Edge Depth 17
in each method.
Width 18
Length 19
5. Conditioning
Water Resistance of Core-Treated Water-Repellent
Gypsum Panel Products 20
5.1 Condition specimens to constant weight at a temperature
Surface Water Resistance of Gypsum Panel Products
of 85 6 15°F (29.5 6 8.5°C) and relative humidity of 50 6
with Water-Repellent Surfaces 21
2 % (Note 1). Test specimens individually after constant
1.3 The text of these test methods references notes and
weight is reached and within 10 min upon removal from the
footnotes that provide explanatory material. These notes and
conditioning chamber.
footnotes, excluding those in tables and figures, shall not be
NOTE 1—Laboratory test results indicated that conditioning tempera-
considered as requirements of these test methods.
tures may range from 70 to 100°F (21 to 38°C) without significantly
1.4 This standard does not purport to address all of the
affecting the results. However, relative humidity is critical. This is the
safety concerns, if any, associated with its use. It is the
reason for testing specimens 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-
Method A—Constant Rate of Loading
bility of regulatory limitations prior to use.
INTRODUCTION
2. Referenced Documents
The following procedures are applicable to so-called “shot
2.1 ASTM Standards:
machines” that utilize lead or steel shot that applies a load to
C 11 Terminology Relating to Gypsum and Related Build-
2
the specimen at a constant stress rate or any other device that
ing Materials and Systems
applies the load at a constant stress rate.
D 3285 Test Method for Water Absorptiveness of Nonbibu-
3
lous Paper and Paperboard (Cobb Test)
6. Apparatus—Method A
4
E 4 Practices for Force Verification of Testing Machines
6.1 Testing Machine—Apply the test load at a uniform rate
3. Terminology
of 1 lbf/s (4.45 N/s) 610 %. Apply the load with a device
independent of manual control of the rate of loading during an
3.1 Definitions used in these test methods are in accordance
individual sample test (see Fig. 1). The deformation of the
1 specimen controls the cross head speed.
These test methods are under the jurisdiction of ASTM Committee C-11 on
Gypsum and Related Building Materials and Systems and are the direct responsi-
7. Flexural Strength (Method A)
bility of Subcommittee C11.01 on Specifications and Test Methods for Gypsum
Products.
7.1 Summary of Test Method—Flexural properties of gyp-
Current edition approved Jan. 10, 2000. Published March 2000. Originally
e1
sum panel products are evaluated by supporting the specimen
published as C 473 – 61. Last previous edition C 473 – 99 .
2
Annual Book of ASTM Standards, Vol 04.01.
near the ends and applying a transverse load midway between
3
Annual Book of ASTM Standards, Vol 15.09.
the supports.
4
Annual Book of ASTM Standards, Vol 03.01.
*A Summary of Changes section appears at the end of this standard.
Copyright © ASTM, 100 Barr Harbor Drive, West Conshohocken, PA 19428-2959, United States.
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NOTICE: This standard has either been superceded and replaced by a new version or discontinued.
Contact ASTM International (www.astm.org) for the latest information.
C 473
edge, test one specimen from each gypsum panel product face
up and the other face down. For specimens with the l
...
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