1.1 本规范适用于快速硬化水硬性水泥。这是一个给出性能要求的规范。对水泥或其成分的组成没有限制。 1.2 该规范根据早期抗压强度发展的具体要求按类型对水泥进行分类。 1.3 以国际单位制单位或英磅单位表示的值应单独视为标准值。每个系统中陈述的值并不完全等同；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。 1.4 本标准的正文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建立适当的安全、健康和环境实践，并在使用前确定法规限制的适用性。（ 警告- 新鲜的水硬性水泥混合物是腐蚀性的，长时间接触可能会对皮肤和组织造成化学灼伤。 2 ) 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 specification is for rapid hardening hydraulic cements. This is a specification giving performance requirements. There are no restrictions on the composition of the cement or its constituents. 1.2 The specification classifies cements by type based on specific requirements for very early compressive strength development. 1.3 The values stated in either SI units or inch-pound units shall be regarded separately as standard. The values stated in each system are not exact equivalents; therefore, each system shall be used independently of the other. Combining values from the two systems may result in nonconformance with the standard. 1.4 The text of this standard 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. ( Warning— Fresh hydraulic cementitious mixtures are caustic and may cause chemical burns to skin and tissue upon prolonged exposure. 2 ) 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.