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ASTM C1038/C1038M-24

Current Revision

Standard Test Method for Expansion of Hydraulic Cementitious Material Mortar Bars Stored in Water

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1.1 This test method covers the determination of the expansion of mortar bars made using hydraulic cementitious materials, of which sulfate is an integral part.

1.2 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.

1.3 The text of this standard refers to notes and footnotes that provide explanatory material. These notes shall not be considered as requirements of 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. (WarningFresh hydraulic cementitious mixtures are caustic and may cause chemical burns to skin and tissue upon prolonged exposure.2)

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.


4.1 This test method is used to determine the amount of expansion of a mortar bar when it is stored in water. The amount of mortar-bar expansion may relate to the amount of sulfate in the cementitious material; expansion may become excessive when the cementitious material contains too much sulfate.

4.2 Some cementitious material specifications limit the amount of sulfate contained in those materials by requiring that the amount of expansion in water not exceed a specified value.

SDO ASTM: ASTM International
Document Number C1038
Publication Date April 1, 2024
Language en - English
Page Count 3
Revision Level 24
Supercedes
Committee C01.28
Publish Date Document Id Type View
April 1, 2024 C1038_C1038M-24 Revision
Dec. 15, 2019 C1038_C1038M-19 Revision
Oct. 1, 2014 C1038_C1038M-14B Revision
June 15, 2014 C1038_C1038M-14A Revision
Jan. 15, 2014 C1038_C1038M-14 Revision
June 15, 2010 C1038_C1038M-10 Revision