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ASTM C191-19

Historical Revision

Standard Test Methods for Time of Setting of Hydraulic Cement by Vicat Needle

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1.1 These test methods determine the time of setting of hydraulic cement by means of the Vicat needle. Two test methods are given; Method A is the Reference Test Method using the manually operated standard Vicat apparatus, while Method B permits the use of an automatic Vicat machine that has, in accordance with the qualification requirements of this method, demonstrated acceptable performance.

1.2 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard.

1.3 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.

Warning:Fresh hydraulic cementitious mixtures are caustic and may cause chemical burns to skin and tissue upon prolonged exposure.2

1.4 The text of this standard references notes and footnotes which provide explanatory material. These notes and footnotes (excluding those in tables and figures) shall not be considered as requirements of the standard.

Note 1: For the method for determining the time of setting by Gillmore needles, see Test Method C266.

1.5 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.


5.1 This test method provides a means of determining compliance with a specification limit for Vicat time of setting. Refer to the appropriate specification for the cement to determine if this test method is used for specification compliance.

5.2 Time of setting measured by this method will not necessarily provide the same results as the time of setting of hydraulic cement paste measured by other methods, or the time of setting of mortar or concrete.

SDO ASTM: ASTM International
Document Number C191
Publication Date Aug. 1, 2019
Language en - English
Page Count 8
Revision Level 19
Supercedes
Committee C01.30
Publish Date Document Id Type View
Oct. 1, 2021 C0191-21 Revision
Aug. 1, 2019 C0191-19 Revision
Oct. 1, 2018 C0191-18A Revision
June 15, 2018 C0191-18 Revision
Dec. 1, 2013 C0191-13 Revision
June 1, 2008 C0191-08 Revision
July 15, 2007 C0191-07 Revision
Nov. 1, 2004 C0191-04B Revision
July 1, 2004 C0191-04A Revision
Jan. 1, 2004 C0191-04 Revision
July 10, 2003 C0191-03 Revision
Nov. 10, 2001 C0191-99 Revision
Nov. 10, 2001 C0191-01A Revision
Nov. 10, 2001 C0191-01 Revision