ASTM C 1506 : 2024

1.1This test method provides for the determination of water retention of hydraulic cement-based mortars and plasters.

1.2This test method provides a water retention value based on mortar flow, while Test Method C1922 provides a water retention value via direct water loss.

1.3The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard. When this test method refers to combined-unit standards, the selection of the measurement systems is at the user’s discretion.2

1.4The 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.

1.5This 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

1.6This 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.