ASTM International - ASTM C471M-20
Standard Test Methods for Chemical Analysis of Gypsum and Gypsum Products (Metric)
| Organization: | ASTM International |
| Publication Date: | 1 October 2020 |
| Status: | inactive |
| Page Count: | 17 |
| ICS Code (Cement. Gypsum. Lime. Mortar): | 91.100.10 |
scope:
1.1 These test methods cover the chemical analysis of gypsum and gypsum panel products, including gypsum ready-mixed plaster, gypsum wood-fibered plaster, and gypsum concrete.
1.2 These test methods appear in the following order:
| Section(s) | |
| Preparation of Sample | 4 |
| Complete Procedure | 5 - 16 |
| Alternative Procedure for Analysis of Free Water in Gypsum Using a Moisture Balance | 17 |
| Alternative Procedure for Analysis of Combined Water in Gypsum Using a Moisture Balance | 18 |
| Alternative Procedure for Analysis for Calcium Sulfate by Ammonium Acetate Method | 19 |
| Alternative Procedure for Analysis for Sodium Chloride by the Coulometric Method | 20 |
| Determination of Sand in Set Plaster | 21 |
| Wood-fiber Content in Wood-fiber Gypsum Plaster | 22 |
| Optional Procedure for Analysis for Sodium by the Atomic Absorption Method | 23 |
| Optional Procedure for Analysis for Sodium by Flame Photometry | 24 |
| Determination of Orthorhombic Cyclooctasulfur (S
8) in Gypsum | 25 |
| Determination of Orthorhombic Cyclooctasulfur (S
8) in Gypsum | 26 |
| Determination of Orthorhombic Cyclooctasulfur (S
8) in Gypsum | 27 |
| Determination of Orthorhombic Cyclooctasulfur (S
8) in Gypsum | 28 |
1.3 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard.
1.4 The text of this standard 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 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.
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.
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