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ASTM C31/C31M-19

Historical Revision

Standard Practice for Making and Curing Concrete Test Specimens in the Field

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1.1 This practice covers procedures for making and curing cylinder and beam specimens from representative samples of fresh concrete for a construction project.

1.2 The concrete used to make the molded specimens shall be sampled after all on-site adjustments have been made to the mixture proportions, including the addition of mix water and admixtures. This practice is not satisfactory for making specimens from concrete not having measurable slump or requiring other sizes or shapes of specimens.

1.3 The values stated in either SI units or inch-pound units are to be regarded separately as standard. The values stated in each system may not be exact equivalents; therefore, each system shall be used independently of the other. Combining values from the two systems may result in non-conformance with the standard.

1.4 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, health, and environmental practices and determine the applicability of regulatory limitations prior to use. (Warning—Fresh hydraulic cementitious mixtures are caustic and may cause chemical burns to exposed skin and tissue upon prolonged exposure.2)

1.5 The text of this standard references notes which provide explanatory material. These notes shall not be considered as requirements of the standard.

1.6 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.


4.1 This practice provides standardized requirements for making, curing, protecting, and transporting concrete test specimens under field conditions.

4.2 If the specimens are made and standard cured, as stipulated herein, the resulting strength test data when the specimens are tested are able to be used for the following purposes:

4.2.1 Acceptance testing for specified strength,

4.2.2 Checking adequacy of mixture proportions for strength, and

4.2.3 Quality control.

4.3 If the specimens are made and field cured, as stipulated herein, the resulting strength test data when the specimens are tested are able to be used for the following purposes:

4.3.1 Determination of whether a structure is capable of being put in service,

4.3.2 Comparison with test results of standard cured specimens or with test results from various in-place test methods,

4.3.3 Adequacy of curing and protection of concrete in the structure, or

4.3.4 Form or shoring removal time requirements.

SDO ASTM: ASTM International
Document Number C31
Publication Date Jan. 1, 2019
Language en - English
Page Count 6
Revision Level 19
Supercedes
Committee C09.61
Publish Date Document Id Type View
Dec. 1, 2024 C0031_C0031M-24C Revision
June 1, 2024 C0031_C0031M-24B Revision
April 1, 2024 C0031_C0031M-24A Revision
Jan. 1, 2024 C0031_C0031M-24 Revision
June 1, 2023 C0031_C0031M-23 Revision
Aug. 1, 2022 C0031_C0031M-22 Revision
May 15, 2021 C0031_C0031M-21A Revision
March 1, 2021 C0031_C0031M-21 Revision
Dec. 15, 2019 C0031_C0031M-19A Revision
Jan. 1, 2019 C0031_C0031M-19 Revision
Aug. 1, 2018 C0031_C0031M-18B Revision
March 15, 2018 C0031_C0031M-18A Revision
Jan. 1, 2018 C0031_C0031M-18 Revision
June 15, 2017 C0031_C0031M-17 Revision
Nov. 15, 2015 C0031_C0031M-15AE01 Revision
Nov. 15, 2015 C0031_C0031M-15A Revision
July 1, 2015 C0031_C0031M-15 Revision
July 1, 2012 C0031_C0031M-12 Revision
Oct. 1, 2010 C0031_C0031M-10 Revision
May 1, 2009 C0031_C0031M-09 Revision
Dec. 15, 2008 C0031_C0031M-08B Revision
April 1, 2008 C0031_C0031M-08A Revision
Feb. 1, 2008 C0031_C0031M-08 Revision
Aug. 1, 2006 C0031_C0031M-06 Revision
Feb. 10, 2003 C0031_C0031M-03A Revision
Jan. 10, 2003 C0031_C0031M-03 Revision
Aug. 10, 2000 C0031_C0031M-00E01 Revision
Aug. 10, 2000 C0031_C0031M-00 Revision