ASTM C 618 : 2025

1.1This specification covers coal ash and raw or calcined natural pozzolan, for use in concrete where cementitious or pozzolanic action, or both, is desired, or where other properties normally attributed to coal ash or natural pozzolans may be desired, or where both objectives are to be achieved.

1.2This specification does not cover the residue resulting from: (1) fluidized bed combustion, (2) the burning of municipal solid waste or any other refuse with coal, or (3) the burning of industrial or municipal solid waste in incinerators.

1.3The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard.

1.4The text of this standard refers to notes and footnotes, that provide explanatory information. These notes and footnotes (excluding those in tables and figures) shall not be considered as requirements of the standard.

1.5This 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.