1.1 本规范涵盖了与水硬性水泥一起使用的膨胀组分，当与水结合和混合时，形成膨胀组分系统，该膨胀组分系统在凝固后体积增加到比水泥浆更大的程度。 附注1: 附录X1 为评估符合本规范的用于补偿收缩混凝土混合物的材料的性能提供指南。 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不一定完全等同；因此，为确保符合标准，每个系统应独立使用，两个系统的数值不得合并使用。 1.3 本标准的文本涉及注释和脚注，并包括提供解释性信息的定义讨论。这些不应被视为标准的要求，图和表中的注释和脚注除外。 1.4 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。 1.5 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 covers expansive components used with hydraulic cements that when combined and mixed with water, form an expansive component system that, after setting, increases in volume to a greater degree than the cement paste. Note 1: Appendix X1 provides guidance for evaluating the performance of materials conforming to this specification for use in shrinkage-compensating concrete mixtures. 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 are not necessarily exact equivalents; therefore, to ensure conformance with the standard, each system shall be used independently of the other, and values from the two systems shall not be combined. 1.3 The text of this standard refers to notes and footnotes and includes discussions of definitions that provide explanatory information. These shall not be considered as requirements of the standard, except for notes and footnotes in figures and tables. 1.4 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. 1.5 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.