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ASTM C1738/C1738M-24

Current Revision

Standard Practice for High-Shear Mixing of Hydraulic Cement Pastes

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1.1 This practice covers the high-shear mixing of hydraulic cement pastes.

1.2 The values stated in SI units or inch-pound units are to be regarded as the standard. Within the text, the inch-pound units are shown in brackets. The values stated in each system are not exact equivalents; therefore, each system shall be used independently of the other. Combining values from the two systems may result in nonconformance with the standard.2

1.3 The text of this test method references notes and footnotes that provide explanatory material. These notes and footnotes, excluding those in tables and figures shall not be considered as requirements of this 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 skin and tissue upon prolonged exposure.)3

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 practice is useful in laboratory research on rheology of hydraulic cement systems as it has been shown to provide a paste with rheological properties similar to those obtained in a concrete from which the aggregate had been removed.6 Mixing of paste using C305 is not satisfactory as the paste is not thoroughly mixed, due to the absence of sand. In this practice the shear imparted to the cement paste is significantly higher than in C305 and therefore it is known as high-shear mixing.

SDO ASTM: ASTM International
Document Number C1738
Publication Date Dec. 1, 2024
Language en - English
Page Count 3
Revision Level 24
Supercedes
Committee C01.22
Publish Date Document Id Type View
Dec. 1, 2024 C1738_C1738M-24 Revision
May 1, 2019 C1738_C1738M-19 Revision
May 1, 2018 C1738_C1738M-18 Revision
April 1, 2014 C1738_C1738M-14 Revision
Oct. 1, 2013 C1738_C1738M-13 Revision