1.1 本规范涵盖了由两种或三种符合ASTM标准的辅助胶凝材料混合或融合而成的混合辅助胶凝材料，用于需要水力或火山灰作用的混凝土或砂浆中。补充胶凝材料包括符合规范的矿渣水泥 C989/C989M 、符合规范的天然火山灰和粉煤灰 C618型 硅粉符合规范 C1240 . 1.2 以国际单位制表示的数值应视为标准值。本标准不包括其他计量单位。 注1: 将辅助胶凝材料作为单独的添加剂或制造的混合物掺入可能会显著改变新拌和硬化混凝土的性能。用户应了解这些变化，并参考 ACI混凝土实践手册 2. 以获取信息和指南。具体参考: ACI 232.1R 天然火山灰在混凝土中的应用 ACI 232.2R 粉煤灰在混凝土中的应用 ACI 233R 混凝土和砂浆中的矿渣水泥 ACI 234R 混凝土中硅粉的使用指南 1.3 本标准并非旨在解决与其使用相关的所有安全问题（如有）。 本标准的用户有责任在使用前制定适当的安全和健康实践，并确定监管限制的适用性。

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 fly ash conforming to Specification C618 and silica fume conforming to Specification C1240 . 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 232.1R Use of Natural Pozzolans in Concrete ACI 232.2R Use of Fly Ash in Concrete ACI 233R Slag Cement in Concrete and Mortar ACI 234R 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 and health practices and determine the applicability of regulatory limitations prior to use.