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Description of ASTM-C61 2011ASTM C61 / C61M - 00(2011)Standard Specification for Gypsum Keene's CementActive Standard ASTM C61 / C61M | Developed by Subcommittee: C11.01 Book of Standards Volume: 04.01 ASTM C61 / C61MAbstract 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. This abstract is a brief summary of the referenced standard. It is informational only and not an official part of the standard; the full text of the standard itself must be referred to for its use and application. ASTM does not give any warranty express or implied or make any representation that the contents of this abstract are accurate, complete or up to date. 1. Scope 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 1The setting time is accelerated by the addition of other materials. Note 2Keene'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.
ASTM Standards 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 Keywords anhydrous gypsum; gypsum; gypsum Keene's cement; gypsum plaster; Keene's cement; plaster; Anhydrous gypsum; Gypsum Keene's cement; Gypsum plaster--specifications; Keene's cement; Plaster--specifications; ICS Code ICS Number Code 91.100.10 (Cement. Gypsum. Lime. Mortar) DOI: 10.1520/C0061_C0061M-00R11 ASTM International is a member of CrossRef. ASTM C61 / C61MThis book also exists in the following packages...Subscription InformationMADCAD.com ASTM Standards subscriptions are annual and access is unlimited concurrency based (number of people that can access the subscription at any given time) from single office location. For pricing on multiple office location ASTM Standards Subscriptions, please contact us at info@madcad.com or +1 800.798.9296.
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