ASTM C472-20

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:    
Precautions for Physical Tests  
4  
Reagents and Materials  
5  
Free Water  
6  
Fineness  
7  
Normal Consistency of Gypsum Plaster  
8  
Normal Consistency of Gypsum Concrete  
9  
Setting Time  
10  
Setting Time (Temperature Rise Method)  
11  
Compressive Strength  
12  
Density  
13  
1.3 The values regarded as standard are either in inch-pound units or SI (metric). The values stated first shall be regarded as the standard. The values given in parentheses are mathematical conversions that are provided for information only and are not considered standard.  
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, health, and environmental practices and determine the applicability of regulatory limitations prior to use. For a specific precautionary statement, see X1.2.1.  
1.6 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.

General Information

• Status: Published
• Publication Date: 31-Mar-2020
• 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

• Referred By: ASTM C1355/C1355M-96(2020) - Standard Specification for Glass Fiber Reinforced Gypsum Composites
• Effective Date: 01-Apr-2020
• Referred By: ASTM C59/C59M-00(2020) - Standard Specification for Gypsum Casting Plaster and Gypsum Molding Plaster
• Effective Date: 01-Apr-2020
• 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-Apr-2020
• Referred By: ASTM C28/C28M-10(2020) - Standard Specification for Gypsum Plasters
• Effective Date: 01-Apr-2020
• Referred By: ASTM C22/C22M-00(2021) - Standard Specification for Gypsum
• Effective Date: 01-Apr-2020
• Referred By: ASTM C11-23 - Standard Terminology Relating to Gypsum and Related Building Materials and Systems
• Effective Date: 01-Apr-2020
• Referred By: ASTM C61/C61M-00(2020) - Standard Specification for Gypsum Keene's Cement
• Effective Date: 01-Apr-2020
• Referred By: ASTM C631-09(2020) - Standard Specification for Bonding Compounds for Interior Gypsum Plastering
• Effective Date: 01-Apr-2020
• Referred By: ASTM F710-22 - Standard Practice for Preparing Concrete Floors to Receive Resilient Flooring
• Effective Date: 01-Apr-2020
• Referred By: ASTM F2224-09(2020) - Standard Specification for High Purity Calcium Sulfate Hemihydrate or Dihydrate for Surgical Implants
• Effective Date: 01-Apr-2020
• Referred By: ASTM C474-15(2020) - Standard Test Methods for Joint Treatment Materials for Gypsum Board Construction
• Effective Date: 01-Apr-2020
• Referred By: ASTM C110-20 - Standard Test Methods for Physical Testing of Quicklime, Hydrated Lime, and Limestone
• Effective Date: 01-Apr-2020
• 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-Apr-2020
• Referred By: ASTM E3355-23 - Standard Guide for Characterization of Coal Combustion Products (CCPs) in Storage Area(s) for Beneficial Use
• Effective Date: 01-Apr-2020

Standards Content (Sample)

This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the
Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.
Designation: C472 − 20
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 U.S. Department of Defense.
1. Scope* 2. Referenced Documents
2
1.1 These test methods cover the physical testing of 2.1 ASTM Standards:
gypsum, gypsum plasters, and gypsum concrete. C11 Terminology Relating to Gypsum and Related Building
Materials and Systems
1.2 The test methods appear in the following sections:
C778 Specification for Standard Sand
Precautions for Physical Tests 4
E11 Specification for Woven Wire Test Sieve Cloth and Test
Reagents and Materials 5
Free Water 6
Sieves
Fineness 7
Normal Consistency of Gypsum Plaster 8
3. Terminology
Normal Consistency of Gypsum Concrete 9
Setting Time 10
3.1 Definitions:
Setting Time (Temperature Rise Method) 11
Compressive Strength 12 3.1.1 For useful definitions refer to Terminology C11.
Density 13
1.3 Thevaluesregardedasstandardareeitherininch-pound 4. Precautions for Physical Tests
units or SI (metric). The values stated first shall be regarded as
4.1 Gypsum products are greatly affected by small amounts
the standard.The values given in parentheses are mathematical
of impurities introduced by careless laboratory manipulation.
conversions that are provided for information only and are not
In order to obtain accurate results, it is absolutely essential to
considered standard.
observe the following precautions:
1.4 The text of this standard references notes and footnotes
4.1.1 Keep all apparatus thoroughly clean. Remove all
which provide explanatory material. These notes and footnotes
traces of set plaster.
(excluding those in tables and figures) are not requirements of
NOTE 1—For mixing pastes and mortars, a 500 mL rubber dental bowl
the standard.
is a convenience.
NOTE 2—Use care when drying gypsum, gypsum plasters, or gypsum
1.5 This standard does not purport to address all of the
concrete. Exceeding the specified drying temperatures may calcine the
safety concerns, if any, associated with its use. It is the
specimens, which will cause inaccurate test results.
responsibility of the user of this standard to establish appro-
priate safety, health, and environmental practices and deter-
5. Reagents and Materials
mine the applicability of regulatory limitations prior to use.
5.1 Distilled or Deionized Water—free of chlorides and
For a specific precautionary statement, see X1.2.1.
sulfates at a temperature of 21 6 1 °C (70 6 2 °F).
1.6 This international standard was developed in accor-
dance with internationally recognized principles on standard-
5.2 Calcium chloride.
ization established in the Decision on Principles for the
5.3 Petroleum jelly.
Development of International Standards, Guides and Recom-
5.4 Reagent grade sodium citrate.
mendations issued by the World Trade Organization Technical
Barriers to Trade (TBT) Committee.
5.5 Standard Sand—Specification C778, 20–30 sand.
5.6 Mineral oil.
1
These test methods are under the jurisdiction of ASTM Committee C11 on
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 April 1, 2020. Published April 2020. Originally contact ASTM Customer Service at [e-mail]. For Annual Book of ASTM
approved in 1961. Last previous edition approved in 2014 as C472 – 99 (2014). Standards volume information, refer to the standard’s Document Summary page on
DOI: 10.1520/C0472-20. 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 ----------------------
C472 − 20
(No. 325) sieve, see Appendix X1.
6. Free Water
NOTE 4—The sizes of the sieves to be used are given in the specifica-
6.1 Significance and Use—This test method determines the
tions of ASTM covering the particular product in question.
free water contained in gypsum, gypsum plasters, and gypsum
NOTE 5—When sieving by hand through a 150 µm (No. 100) sieve, use
a lateral motion, and tap the side of the sieve with the palm of the hand.
concrete samples,
...

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: C472 − 99 (Reapproved 2014) C472 − 20
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 U.S. Department of Defense.
1. Scope 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:
Precautions for Physical Tests 4
Reagents and Materials 5
Free Water 6
Fineness 7
Normal Consistency of Gypsum Plaster 8
Normal Consistency of Gypsum Concrete 9
Setting Time 10
Setting Time (Temperature Rise Method) 11
Compressive Strength 12
Density 13
Sections
Precautions for Physical Tests 4
Reagents and Materials 5
Free Water 6
Fineness 7
Normal Consistency of Gypsum Plaster 8
Normal Consistency of Gypsum Concrete 9
Setting Time 10
Setting Time (Temperature Rise Method) 11
Compressive Strength 12
Density 13
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 The values given in parentheses are approximate and mathematical conversions that are provided
for information purposes only.only and are not considered standard.
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 safety, health, and healthenvironmental practices and determine the
applicability of regulatory limitations prior to use. For a specific precautionary statement, see X1.2.1.
1.6 This international standard was developed in accordance with internationally recognized principles on standardization
established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued
by the World Trade Organization Technical Barriers to Trade (TBT) Committee.
2. Referenced Documents
2
2.1 ASTM Standards:
C11 Terminology Relating to Gypsum and Related Building Materials and Systems
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 April 1, 2014April 1, 2020. Published April 2014April 2020. Originally approved in 1961. Last previous edition approved in 20092014 as
C472 – 99 (2009).(2014). DOI: 10.1520/C0472-99R14.10.1520/C0472-20.
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

---------------------- Page: 1 ----------------------
C472 − 20
C778 Specification for Standard Sand
E11 Specification for Woven Wire Test Sieve Cloth and Test Sieves
3. Terminology
3.1 Definitions:
3.1.1 For useful definitions refer to Terminology C11.
4. Precautions for Physical Tests
4.1 Gypsum products are greatly affected by small amounts of impurities introduced by careless laboratory manipulation. In
order to obtain accurate results, it is absolutely essential to observe the following precautions:
4.1.1 Keep all apparatus thoroughly clean. Remove all traces of set plaster.
NOTE 1—For mixing pastes and mortars, a 500-ml500 mL rubber dental bowl is a convenience.
NOTE 2—Use care when drying gypsum, gypsum plasters, or gypsum concrete. Exceeding the specified drying temperatures may calcine the specimens,
which will cause inaccurate test results.
5. Reagents and Materials
5.1 Distilled or Deionized Water—free of chlorides and sulfates at a temperature of 21 6 1°C1 °C (70 6 2°F).2 °F).
5.2 Calcium chloride.
5.3 Petroleum jelly.
5.4
...