ASTM C59/C59M-00 (R2020) PDF Download

ASTM C59/C59M-00 (R2020) is a standard specification that outlines the requirements for gypsum casting plaster and gypsum molding plaster materials. These materials are primarily composed of calcined gypsum. The standard emphasizes the need for the chemical composition of the plaster materials to meet the specified purity level.

The standard also provides guidelines for sampling the plaster materials, where equal amounts are taken from both the outer and center of each package. This ensures that the samples collected are representative of the entire package.

Furthermore, ASTM C59/C59M-00 (R2020) specifies several tests that should be conducted on the plaster materials. These tests include measuring the setting time, compressive strength, and fineness of the specimens. By conducting these tests, the quality and performance characteristics of the plaster materials can be determined.

Lastly, the standard acknowledges that it may be used with either inch-pound or SI units. It emphasizes that the values stated in each system are not necessarily exact equivalents, and therefore, should be used independently without combining values from both systems. The standard also includes explanatory notes and footnotes, which provide additional information but are not considered mandatory requirements.