ASTM C1038/C1038M-24
Standard Test Method for Expansion of Hydraulic Cementitious Material Mortar Bars Stored in Water

Scope: 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. (Warning—Fresh 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.

ASTM C1038/C1038M-24 Referenced Document

ASTM C1005 Standard Specification for Reference Masses and Devices for Determining Mass and Volume for Use in Physical Testing of Hydraulic Cements
ASTM C109/C109M Standard Test Method for Compressive Strength of Hydraulic Cement Mortars (Using 2-in. or [50-mm] Cube Specimens)
ASTM C114 Standard Test Methods for Chemical Analysis of Hydraulic Cement*， 2024-06-01 Update
ASTM C125 Standard Terminology Relating to Concrete and Concrete Aggregates*， 2024-10-01 Update
ASTM C1437 Standard Test Method for Flow of Hydraulic Cement Mortar
ASTM C219 Standard Terminology Relating to Hydraulic and Other Inorganic Cements*， 2025-01-01 Update
ASTM C305 Standard Practice for Mechanical Mixing of Hydraulic Cement Pastes and Mortars of Plastic Consistency
ASTM C490 Standard Practice for Use of Apparatus for the Determination of Length Change of Hardened Cement Paste, Mortar, and Concrete*， 2025-01-15 Update
ASTM C511 Standard Specification for Moist Cabinets, Moist Rooms, and Water Storage Tanks Used in the Testing of Hydraulic Cements and Concretes
ASTM C778 Standard Specification for Standard Sand

2024 ASTM C1038/C1038M-24 Standard Test Method for Expansion of Hydraulic Cementitious Material Mortar Bars Stored in Water
2019 ASTM C1038/C1038M-19 Standard Test Method for Expansion of Hydraulic Cement Mortar Bars Stored in Water
2014 ASTM C1038/C1038M-14b Standard Test Method for Expansion of Hydraulic Cement Mortar Bars Stored in Water
2014 ASTM C1038/C1038M-14a Standard Test Method for Expansion of Hydraulic Cement Mortar Bars Stored in Water
2014 ASTM C1038/C1038M-14 Standard Test Method for Expansion of Hydraulic Cement Mortar Bars Stored in Water
2010 ASTM C1038/C1038M-10 Standard Test Method for Expansion of Hydraulic Cement Mortar Bars Stored in Water
2004 ASTM C1038-04 Standard Test Method for Expansion of Hydraulic Cement Mortar Bars Stored in Water
2001 ASTM C1038-01e1 Standard Test Method for Expansion of Hydraulic Cement Mortar Bars Stored in Water
2001 ASTM C1038-01 Standard Test Method for Expansion of Hydraulic Cement Mortar Bars Stored in Water
1995 ASTM C1038-95 Standard Test Method for Expansion of Hydraulic Cement Mortar Bars Stored in Water