1.1 本规范适用于一般和特殊应用的混合水硬性水泥，使用矿渣、火山灰、石灰石或这些的某种组合，以及波特兰水泥或波特兰水泥熟料或矿渣和石灰。 附注1: 本规范规定了成分和比例，并有一些性能要求，而性能规范 C1157/C1157M 是一种水硬性水泥规范，其中性能标准单独决定产品及其验收。 1.2 以SI单位或英寸-磅单位表示的值应单独视为标准值。每个系统中陈述的值可能不完全等同；因此，每个系统应独立使用。合并两个系统的值可能导致不符合标准。国际单位制单位[或英磅单位]的数值应通过国际单位制单位[或英磅单位]的测量或通过适当的换算获得，使用中给出的换算和四舍五入规则 IEEE/ASTM SI 10 以其他单位[或SI单位]进行的测量。当实践中不使用英寸-磅单位时，数值仅以SI单位表示。 1.3 本说明书的文本参考了提供解释材料的注释和脚注。这些注释和脚注（不包括表格和图表中的注释和脚注）不是标准的要求。 1.4 本国际标准是根据世界贸易组织技术性贸易壁垒（TBT）委员会发布的《关于制定国际标准、指南和建议的原则的决定》中确立的国际公认的标准化原则制定的。

1.1 This specification pertains to blended hydraulic cements for both general and special applications, using slag, pozzolan, limestone, or some combination of these, with portland cement or portland cement clinker or slag with lime. Note 1: This specification prescribes ingredients and proportions, with some performance requirements, whereas Performance Specification C1157/C1157M is a hydraulic cement specification in which performance criteria alone govern the products and their acceptance. 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. Values in SI units [or inch-pound units] shall be obtained by measurement in SI units [or inch-pound units] or by appropriate conversion, using the Rules for Conversion and Rounding given in IEEE/ASTM SI 10 , of measurements made in other units [or SI units]. Values are stated in only SI units when inch-pound units are not used in practice. 1.3 The text of this specification refers to notes and footnotes, which provide explanatory material. These notes and footnotes (excluding those in tables and figures) are not requirements of the standard. 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.