1.1 本性能规范涵盖一般和特殊应用的水硬性水泥。对水泥或其成分的组成没有限制（见 附注1 ). 附注1: 有两个相关的水硬性水泥标准，规范 C150/C150M 波特兰水泥和规格 C595/C595M 对于混合水泥，两者都包含规范和性能要求。 1.2 本性能规范根据一般用途、高早期强度、抗硫酸盐侵蚀和水化热的具体要求对水泥进行分类。提供了与碱-二氧化硅-反应性骨料的低反应性和引气水泥的可选要求。 1.3 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。 1.4 本性能规范的文本是指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。 1.5 本标准并不旨在解决与其使用相关的所有安全性问题（如果有）。本标准的使用者有责任在使用前建立适当的安全、健康和环境实践并确定法规限制的适用性。 1.6 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 performance specification covers hydraulic cements for both general and special applications. There are no restrictions on the composition of the cement or its constituents (see Note 1 ). Note 1: There are two related hydraulic cement standards, Specification C150/C150M for portland cement and Specifications C595/C595M for blended cements, both of which contain prescriptive and performance requirements. 1.2 This performance specification classifies cements based on specific requirements for general use, high early strength, resistance to attack by sulfates, and heat of hydration. Optional requirements are provided for the property of low reactivity with alkali-silica-reactive aggregates and for air-entraining cements. 1.3 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. 1.4 The text of this performance specification refers to notes and footnotes that provide explanatory material. These notes and footnotes (excluding those in tables and figures) are not requirements of the standard. 1.5 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. 1.6 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.