ASTM C22/C22M-00(2021)
(Specification)Standard Specification for Gypsum
Standard Specification for Gypsum
ABSTRACT
This specification covers gypsum, calcium sulfate combined with two molecules of water in crystalline form. If necessary, gypsum shall be crushed or ground, or both, to the size specified. Different test methods shall be performed in order to determine the chemical composition and physical properties of gypsum.
SCOPE
1.1 This specification covers gypsum, calcium sulfate combined with two molecules of water in crystalline form and having the approximate chemical formula CaSO4·2H2O.
1.2 The values stated in either inch-pound units or SI (metric) are to be regarded separately as the standard. Within the text, the SI units are shown in brackets. The values stated in each system shall be used independently of the other. Values from the two systems shall not be combined.
1.3 The text of this specification references notes and footnotes which provide explanatory material. These notes and footnotes (excluding those in tables and figures) shall not be considered as requirements of the specification.
1.4 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-2021
- Technical Committee
- C11 - Gypsum and Related Building Materials and Systems
- Drafting Committee
- C11.01 - Specifications and Test Methods for Gypsum Products
Relations
- Refers
ASTM C471M-24 - Standard Test Methods for Chemical Analysis of Gypsum and Gypsum Products (Metric) - Effective Date
- 01-Apr-2024
- Effective Date
- 01-Apr-2020
- Refers
ASTM C11-18a - Standard Terminology Relating to Gypsum and Related Building Materials and Systems - Effective Date
- 01-Oct-2018
- Refers
ASTM C11-18 - Standard Terminology Relating to Gypsum and Related Building Materials and Systems - Effective Date
- 01-Jun-2018
- Refers
ASTM C11-17a - Standard Terminology Relating to Gypsum and Related Building Materials and Systems - Effective Date
- 01-Oct-2017
- Refers
ASTM C471M-17a - Standard Test Methods for Chemical Analysis of Gypsum and Gypsum Products (Metric) - Effective Date
- 01-Oct-2017
- Refers
ASTM C471M-17e1 - Standard Test Methods for Chemical Analysis of Gypsum and Gypsum Products (Metric) - Effective Date
- 01-Jun-2017
- Refers
ASTM C471M-17 - Standard Test Methods for Chemical Analysis of Gypsum and Gypsum Products (Metric) - Effective Date
- 01-Jun-2017
- Refers
ASTM C11-17 - Standard Terminology Relating to Gypsum and Related Building Materials and Systems - Effective Date
- 15-May-2017
- Refers
ASTM C471M-16a - Standard Test Methods for Chemical Analysis of Gypsum and Gypsum Products (Metric) - Effective Date
- 15-Jun-2016
- Refers
ASTM C11-16 - Standard Terminology Relating to Gypsum and Related Building Materials and Systems - Effective Date
- 15-May-2016
- Refers
ASTM C471M-16 - Standard Test Methods for Chemical Analysis of Gypsum and Gypsum Products (Metric) - Effective Date
- 01-Jan-2016
- Refers
ASTM C11-15a - Standard Terminology Relating to Gypsum and Related Building Materials and Systems - Effective Date
- 01-Oct-2015
- Refers
ASTM C11-15 - Standard Terminology Relating to Gypsum and Related Building Materials and Systems - Effective Date
- 01-Apr-2015
- Refers
ASTM C471M-14 - Standard Test Methods for Chemical Analysis of Gypsum and Gypsum Products (Metric) - Effective Date
- 01-Nov-2014
Overview
ASTM C22/C22M-00(2021) - Standard Specification for Gypsum is an internationally recognized standard issued by ASTM International. It provides comprehensive requirements for gypsum, specifically calcium sulfate dihydrate (CaSO₄·2H₂O), in its crystalline form. This standard sets out the specifications for both the chemical composition and the physical properties of gypsum, ensuring material quality and consistency for industrial and construction applications. ASTM C22/C22M can be used in both inch-pound and SI (metric) measurements, further supporting global applicability and compliance.
Key Topics
Material Requirements
- Covers gypsum containing not less than 70% calcium sulfate dihydrate (CaSO₄·2H₂O) by weight.
- Specifies the crystalline form and the need for compliance with chemical composition limits.
Physical Properties
- Details procedures for crushing, grinding, or sizing gypsum to meet order specifications.
- Requires thorough sampling methods for both bulk and packaged shipments to ensure product uniformity.
- Laboratory sample preparation and handling must maintain material integrity for testing.
Testing Methods
- Chemical and physical analyses must follow ASTM C471M and ASTM C472, respectively.
- Ensures that all tests are conducted according to established ASTM testing procedures.
Inspection and Certification
- Inspection procedures are determined by mutual agreement between supplier and purchaser.
- Provides for manufacturer’s certification, certifying compliance upon request.
- Gypsum failing to meet requirements is to be rejected and documented in writing.
Packaging and Marking
- Gypsum may be shipped in bulk or packaged form.
- Packages must be labeled with required information: manufacturer name, material description, and weight.
- For bulk shipments, this information must accompany the delivery visibly.
Applications
ASTM C22/C22M-00(2021) plays a crucial role in sectors where quality-controlled gypsum is essential:
Construction and Building Materials
- Used as a core material for wallboard, plaster, and drywall systems.
- Ensures consistency and safety in construction applications by verifying material purity and composition.
Industrial and Manufacturing
- Applied in the production of gypsum plasters and cements.
- Important for industries producing prefabricated building components or specialized gypsum products.
Quality Assurance and Procurement
- Provides a benchmark for purchasing specifications, facilitating transparent transactions between suppliers and buyers.
- Supports regulatory compliance in markets requiring evidence of material standards.
Related Standards
The ASTM C22/C22M-00(2021) specification refers to and aligns with several other ASTM standards, ensuring an integrated approach to quality and testing:
- ASTM C11: Terminology Relating to Gypsum and Related Building Materials and Systems
- ASTM C471M: Test Methods for Chemical Analysis of Gypsum and Gypsum Products (Metric)
- ASTM C472: Test Methods for Physical Testing of Gypsum, Gypsum Plasters, and Gypsum Concrete
By referencing and utilizing these related specifications, users of ASTM C22/C22M ensure comprehensive material characterization and adherence to best practices in quality control within the gypsum supply chain.
Keywords: ASTM C22/C22M, gypsum specification, calcium sulfate dihydrate, gypsum standard, gypsum testing, ASTM gypsum, construction materials, building material standards, gypsum packaging, gypsum quality assurance
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Frequently Asked Questions
ASTM C22/C22M-00(2021) is a technical specification published by ASTM International. Its full title is "Standard Specification for Gypsum". This standard covers: ABSTRACT This specification covers gypsum, calcium sulfate combined with two molecules of water in crystalline form. If necessary, gypsum shall be crushed or ground, or both, to the size specified. Different test methods shall be performed in order to determine the chemical composition and physical properties of gypsum. SCOPE 1.1 This specification covers gypsum, calcium sulfate combined with two molecules of water in crystalline form and having the approximate chemical formula CaSO4·2H2O. 1.2 The values stated in either inch-pound units or SI (metric) are to be regarded separately as the standard. Within the text, the SI units are shown in brackets. The values stated in each system shall be used independently of the other. Values from the two systems shall not be combined. 1.3 The text of this specification references notes and footnotes which provide explanatory material. These notes and footnotes (excluding those in tables and figures) shall not be considered as requirements of the specification. 1.4 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.
ABSTRACT This specification covers gypsum, calcium sulfate combined with two molecules of water in crystalline form. If necessary, gypsum shall be crushed or ground, or both, to the size specified. Different test methods shall be performed in order to determine the chemical composition and physical properties of gypsum. SCOPE 1.1 This specification covers gypsum, calcium sulfate combined with two molecules of water in crystalline form and having the approximate chemical formula CaSO4·2H2O. 1.2 The values stated in either inch-pound units or SI (metric) are to be regarded separately as the standard. Within the text, the SI units are shown in brackets. The values stated in each system shall be used independently of the other. Values from the two systems shall not be combined. 1.3 The text of this specification references notes and footnotes which provide explanatory material. These notes and footnotes (excluding those in tables and figures) shall not be considered as requirements of the specification. 1.4 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.
ASTM C22/C22M-00(2021) is classified under the following ICS (International Classification for Standards) categories: 91.100.10 - Cement. Gypsum. Lime. Mortar. The ICS classification helps identify the subject area and facilitates finding related standards.
ASTM C22/C22M-00(2021) has the following relationships with other standards: It is inter standard links to ASTM C471M-24, ASTM C472-20, ASTM C11-18a, ASTM C11-18, ASTM C11-17a, ASTM C471M-17a, ASTM C471M-17e1, ASTM C471M-17, ASTM C11-17, ASTM C471M-16a, ASTM C11-16, ASTM C471M-16, ASTM C11-15a, ASTM C11-15, ASTM C471M-14. Understanding these relationships helps ensure you are using the most current and applicable version of the standard.
ASTM C22/C22M-00(2021) is available in PDF format for immediate download after purchase. The document can be added to your cart and obtained through the secure checkout process. Digital delivery ensures instant access to the complete standard document.
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: C22/C22M −00 (Reapproved 2021)
Standard Specification for
Gypsum
This standard is issued under the fixed designation C22/C22M; 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 4. Chemical Composition
1.1 This specification covers gypsum, calcium sulfate com- 4.1 Gypsum shall contain not less than 70.0 weight percent
bined with two molecules of water in crystalline form and CaSO ·2H O.
4 2
having the approximate chemical formula CaSO ·2H O.
4 2
4.2 The chemical composition, within the limits prescribed
1.2 The values stated in either inch-pound units or SI by 4.1, shall be specified in the purchase order or contract.
(metric) are to be regarded separately as the standard. Within
5. Physical Properties
the text, the SI units are shown in brackets. The values stated
5.1 Size—If necessary, gypsum shall be crushed or ground,
in each system shall be used independently of the other. Values
or both, to the size specified in the purchase order.
from the two systems shall not be combined.
1.3 The text of this specification references notes and
6. Sampling
footnotes which provide explanatory material. These notes and
6.1 Bulk—When gypsum is shipped in bulk, samples of
footnotes (excluding those in tables and figures) shall not be
approximately 5 lb [2 kg] each shall be taken at regular
considered as requirements of the specification.
intervals during the complete loading or unloading of the
1.4 This international standard was developed in accor-
carrier, in such a way as to accumulate not less than 200 lb
dance with internationally recognized principles on standard-
[90 kg] of material and to represent correctly the percentages
ization established in the Decision on Principles for the
of both the coarse particles and the fines in the shipment. This
Development of International Standards, Guides and Recom-
material shall be broken to pass a 1-in. [25.0 mm] sieve,
mendations issued by the World Trade Organization Technical
thoroughly mixed, and reduced by quartering to provide not
Barriers to Trade (TBT) Committee.
less than a 1-lb [0.5 kg] sample for the laboratory.
6.2 Packages—When gypsum is shipped in packages, not
2. Referenced Documents
less than 1 % of the packages shall be sampled. Samples shall
2.1 ASTM Standards:
be taken from both the surface and the center of the packages.
C11 Terminology Relating to Gypsum and Related Building
These samples shall then be broken, mixed, and quartered in
Materials and Systems
accordance with 6.1.
C471M Test Methods for ChemicalAnalysis of Gypsum and
6.3 Laboratory Samples—Each laboratory sample shall be
Gypsum Products (Metric)z
placed immediately in an airtight container and shipped to the
C472 Test Methods for Physical Testing of Gypsum, Gyp-
laboratory for testing.
sum Plasters, and Gypsum Concrete
7. Test Methods
3. Terminology
7.1 The chemical composition of gypsum shall be deter-
3.1 Definitions:
mined in accordance with Test Methods C471M.
3.1.1 Definitions shall be in accordance with Terminology
7.2 The physical properties of gypsum shall be determined
C11.
in accordance with Test Methods C472.
1 8. Inspe
...
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