ASTM C472-99(2009)

Standard Test Methods for Physical Testing of Gypsum, Gypsum Plasters and Gypsum Concrete

ABSTRACT
These test methods cover the physical testing of gypsum, gypsum plasters, and gypsum concrete. Test methods are detailed for the following: precautions for physical tests, reagents and materials, free water, fineness, normal consistency of gypsum plaster and gypsum concrete, setting time, setting time (temperature rise method), compressive strength, and density. Materials include distilled or deionized water and standard sand. For each test method, the following are specified: significance and use, apparatus, and procedure.
SCOPE
1.1 These test methods cover the physical testing of gypsum, gypsum plasters, and gypsum concrete.
1.2 The test methods appear in the following sections:
  Sections   Precautions for Physical Tests4 Reagents and Materials5 Free Water6 Fineness7 Normal Consistency of Gypsum Plaster8 Normal Consistency of Gypsum Concrete9 Setting Time10 Setting Time (Temperature Rise Method)11 Compressive Strength12 Density13
1.3 The values regarded as the standard are either in inch-pound units or SI (metric). The values stated first shall be regarded as the standard. Values following 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) are not 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. For a specific precautionary statement, see X1.2.1.

General Information

• Status: Historical
• Publication Date: 31-Aug-2009
• 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 C472-99(2004) - Standard Test Methods for Physical Testing of Gypsum, Gypsum Plasters and Gypsum Concrete
• Effective Date: 01-Sep-2009
• Replaced By: ASTM C472-99(2014) - Standard Test Methods for Physical Testing of Gypsum, Gypsum Plasters and Gypsum Concrete
• Effective Date: 01-Apr-2014
• Referred By: ASTM C11-23 - Standard Terminology Relating to Gypsum and Related Building Materials and Systems
• Effective Date: 01-Sep-2009
• Referred By: ASTM C22/C22M-00(2021) - Standard Specification for Gypsum
• Effective Date: 01-Sep-2009
• Referred By: ASTM C28/C28M-10(2020) - Standard Specification for Gypsum Plasters
• Effective Date: 01-Sep-2009
• Referred By: ASTM C59/C59M-00(2020) - Standard Specification for Gypsum Casting Plaster and Gypsum Molding Plaster
• Effective Date: 01-Sep-2009
• Referred By: ASTM C61/C61M-00(2020) - Standard Specification for Gypsum Keene's Cement
• Effective Date: 01-Sep-2009
• Referred By: ASTM F2678-16(2021) - Standard Practice for Preparing Panel Underlayments, Thick Poured Gypsum Concrete Underlayments, Thick Poured Lightweight Cellular Concrete Underlayments, and Concrete Subfloors with Underlayment Patching Compounds to Receive Resilient Flooring
• Effective Date: 01-Sep-2009
• Referred By: ASTM C317/C317M-00(2019) - Standard Specification for Gypsum Concrete
• Effective Date: 01-Sep-2009
• Referred By: ASTM F710-22 - Standard Practice for Preparing Concrete Floors to Receive Resilient Flooring
• Effective Date: 01-Sep-2009
• Referred By: ASTM C617/C617M-15 - Standard Practice for Capping Cylindrical Concrete Specimens
• Effective Date: 01-Sep-2009
• Referred By: ASTM C631-09(2020) - Standard Specification for Bonding Compounds for Interior Gypsum Plastering
• Effective Date: 01-Sep-2009
• Referred By: ASTM E3355-23 - Standard Guide for Characterization of Coal Combustion Products (CCPs) in Storage Area(s) for Beneficial Use
• Effective Date: 01-Sep-2009
• Referred By: ASTM C474-15(2020) - Standard Test Methods for Joint Treatment Materials for Gypsum Board Construction
• Effective Date: 01-Sep-2009
• Referred By: ASTM F2419-11(2021) - Standard Practice for Installation of Thick Poured Gypsum Concrete Underlayments and Preparation of the Surface to Receive Resilient Flooring
• 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:C472 −99(Reapproved 2009)
Standard Test Methods for
Physical Testing of Gypsum, Gypsum Plasters and Gypsum
1
Concrete
This standard is issued under the fixed designation C472; 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.
This standard has been approved for use by agencies of the Department of Defense.
1. Scope 2. Referenced Documents
2
2.1 ASTM Standards:
1.1 These test methods cover the physical testing of
C11 Terminology Relating to Gypsum and Related Building
gypsum, gypsum plasters, and gypsum concrete.
Materials and Systems
1.2 The test methods appear in the following sections:
C778 Specification for Sand
E11 Specification for Woven Wire Test Sieve Cloth and Test
Sections
Sieves
Precautions for Physical Tests 4
Reagents and Materials 5
3. Terminology
Free Water 6
Fineness 7
3.1 Definitions:
Normal Consistency of Gypsum Plaster 8
3.1.1 For useful definitions refer to Terminology C11.
Normal Consistency of Gypsum Concrete 9
Setting Time 10
4. Precautions for Physical Tests
Setting Time (Temperature Rise Method) 11
Compressive Strength 12
4.1 Gypsum products are greatly affected by small amounts
Density 13
of impurities introduced by careless laboratory manipulation.
In order to obtain accurate results, it is absolutely essential to
1.3 The values regarded as the standard are either in
observe the following precautions:
inch-pound units or SI (metric). The values stated first shall be
4.1.1 Keep all apparatus thoroughly clean. Remove all
regarded as the standard. Values following in parentheses are
traces of set plaster.
approximate and are provided for information purposes only.
NOTE 1—For mixing pastes and mortars, a 500-ml rubber dental bowl
1.4 The text of this standard references notes and footnotes
is a convenience.
which provide explanatory material. These notes and footnotes
NOTE 2—Use care when drying gypsum, gypsum plasters, or gypsum
(excluding those in tables and figures) are not requirements of concrete. Exceeding the specified drying temperatures may calcine the
specimens, which will cause inaccurate test results.
the standard.
5. Reagents and Materials
1.5 This standard does not purport to address all of the
5.1 Distilled or Deionized Water—free of chlorides and
safety concerns, if any, associated with its use. It is the
sulfates at a temperature of 21 6 1°C (70 6 2°F).
responsibility of the user of this standard to establish appro-
priate safety and health practices and determine the applica- 5.2 Standard Sand— Specification C778, 20–30 sand.
bility of regulatory limitations prior to use. For a specific
6. Free Water
precautionary statement, see X1.2.1.
6.1 Significance and Use—This test method determines the
free water contained in gypsum, gypsum plasters, and gypsum
concrete samples, and prepares the sample for subsequent
1
These test methods are under the jurisdiction of ASTM Committee C11 on
testing.
Gypsum and Related Building Materials and Systems and are the direct responsi-
bility of Subcommittee C11.01 on Specifications and Test Methods for Gypsum
2
Products. For referenced ASTM standards, visit the ASTM website, www.astm.org, or
Current edition approved Sept. 1, 2009. Published September 2009. Originally contact ASTM Customer Service at [e-mail]. For Annual Book of ASTM
approved in 1961. Last previous edition approved in 2004 as C472–99(2004). DOI: Standards volume information, refer to the standard’s Document Summary page on
10.1520/C0472-99R09. the ASTM website.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
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C472−99 (2009)
retained material temporarily to another vessel, invert the sieve over a
6.2 Apparatus:
sheet of paper on the table and tap it sharply against the table. Then
6.2.1 Balance, capable of weighing not less than 500 g at
transfer all the retained material back into the sieve and continue sieving.
a precision of 0.1 g.
7.4 Report—Report the percent by weight retained on each
6.2.2 Drying Oven, set at 45 6 3°C.
sieve or passing particular sieves in accordance with the
6.2.3 Desiccator, containing calcium chloride or equiva-
material specification to the nearest full percentage point.
lent desiccant.
7.5 Precision and Bias—The precision and bias of the
6.3 Procedure:
fineness test method have not been determined.
6.3.1 Weigh a sample of not less than 500 g of the material
as received to the nearest 0.1 g and spread it to a thin layer in
8. Normal Consistency of Gypsum Plaster
a suitable-vessel. Place in an oven (6.2.2) a
...