ASTM C61/C61M-26

Detail information

Designation: ASTM C61/C61M-26

Publication date: 01/04/2026

Pages: 3

Country: American technical standard

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Anotation

This specification covers various grades of anhydrous calcined gypsum known as gypsum Keene´s cement, designed for use in the base and finish coats of gypsum plaster. The cement shall show a combined water content not more than the specified value when tested in accordance with the referenced test method. The cement shall conform to the required physical properties and shall undergo tests on setting time, compressive strength, and fineness.


Keywords:
anhydrous gypsum, gypsum, gypsum Keene’s cement, gypsum plaster, Keene’s cement, plaster ,, ICS Number Code 91.100.10 (Cement. Gypsum. Lime. Mortar)