ASTM C 1697:2025

1.1 This specification covers blended supplementary cementitious materials that result from the blending or intergrinding of two or three ASTM compliant supplementary cementitious materials, for use in concrete or mortar where hydraulic or pozzolanic action, or both, is desired. The supplementary cementitious materials include slag cement conforming to Specification C989/C989M , natural pozzolans and coal ash conforming to Specification C618 , silica fume conforming to Specification C1240 , and ground-glass pozzolan conforming to Specification C1866/C1866M . 1.2 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard. Note 1: The incorporation of supplementary cementitious materials as separate additions or as a manufactured blend may significantly alter the properties of fresh and hardened concrete. The user should be aware of these changes and is referred to the ACI Manual of Concrete Practice 2 for information and guidelines. Specific reference is made to: ACI PRC-232.1 Report on the Use of Raw or Processed Natural Pozzolans in Concrete ACI PRC-232.2 Report on the Use of Fly Ash in Concrete ACI PRC-233 Guide to the Use of Slag Cement in Concrete and Mortar ACI PRC-234 Guide for the Use of Silica Fume in Concrete 1.3 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. 1.4 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.

91.100.10