Active Standard ASTM C59 / C59M | Developed by Subcommittee: C11.01
Book of Standards Volume: 04.01
Historical (view previous versions of standard)
This specification covers casting and molding plaster materials consisting essentially of calcined gypsum. The chemical composition of each plaster material should meet the required purity value. For samples, equal amounts of material should be taken from the outer and center of each package. Specimens shall also be tested for setting time, compressive strength and fineness.
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1.1 This specification covers gypsum casting plaster and gypsum molding plaster materials consisting essentially of calcined gypsum.
1.2 The values stated in either inch-pound or SI (metric) units are to be regarded as 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 standard references notes and footnotes that provide explanatory material. These notes and footnotes shall not be considered as requirements of the standard.
2. Referenced Documents (purchase separately) The documents listed below are referenced within the subject standard but are not provided as part of the standard.
C11 Terminology Relating to Gypsum and Related Building Materials and Systems
C471M Test Methods for Chemical Analysis of Gypsum and Gypsum Products (Metric)
C472 Test Methods for Physical Testing of Gypsum, Gypsum Plasters and Gypsum Concrete
E11 Specification for Woven Wire Test Sieve Cloth and Test Sieves
UNSPSC Code 30111701(Gypsum plaster)