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ASTM C61/C61M-00(2011)

Historical Reaffirmation

Standard Specification for Gypsum Keene's Cement

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1.1 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.

Note 1—The setting time is accelerated by the addition of other materials.

Note 2—Keene's cements are generally available as quick-setting and standard-setting types. However, various grades of gypsum Keene's cement of different fineness and setting time are available. Grades intended for use in scagliola castings and other special purposes should conform to the requirements of this specification in all respects except fineness and setting time.

1.2 The values stated in either inch-pound or SI (metric) units are to be regarded separately 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.

1.4 The following safety hazards caveat pertains only to the test method in the appendix of this specification: 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 and health practices and determine the applicability of regulatory limitations prior to use.

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.


SDO ASTM: ASTM International
Document Number C61
Publication Date May 1, 2011
Language en - English
Page Count 3
Revision Level 00(2011)
Supercedes
Committee C11.01
Publish Date Document Id Type View
July 10, 2000 C0061_C0061M-00 Revision
June 1, 2020 C0061_C0061M-00R20 Reaffirmation
Oct. 1, 2015 C0061_C0061M-00R15 Reaffirmation
May 1, 2011 C0061_C0061M-00R11 Reaffirmation
May 1, 2006 C0061_C0061M-00R06 Reaffirmation