1.1 本试验方法包括在室温下浸入氢氧化钠（NaOH）溶液时测定碳酸盐岩样品的膨胀。浸泡期间发生的长度变化表明了岩石反应性的一般水平，以及是否应进行试验以确定从岩石制备的骨料对混凝土体积变化的影响。 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。 1.3 本标准的文本是指提供解释性材料的注释和脚注。这些注释和脚注（不包括表和图中的注释和脚注）不应视为本标准的要求。 1.4 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、健康和环境实践，并确定监管限制的适用性。 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》中确立的国际公认标准化原则制定的。 ====意义和用途====== 5.1 本试验方法旨在相对快速地指示可用作混凝土骨料的某些碳酸盐岩的潜在膨胀反应性。该测试方法已成功应用于( 1. )研究和( 2. )初步筛选骨料来源，以表明在混凝土中使用时存在潜在有害膨胀的材料。 5.2 试验方法旨在作为研究和筛选方法，而不是作为规范要求的基础。其目的是根据指南补充现场服务记录、岩相检查的数据 C295/C295M ，并根据试验方法对混凝土中的骨料进行试验 C1105 . 5.3 参与混凝土中骨料成分膨胀反应的碱通常来自水硬性水泥；在某些情况下，它们可能来自混凝土的其他成分或外部来源。骨料的碱反应性有两种: ( 1. )涉及某些硅质岩石、矿物和人造玻璃的碱-硅反应，以及( 2. )碱性碳酸盐反应，涉及某些方解石白云石、白云质石灰岩和白云岩中的白云石。本试验方法不适用于检测碱-硅反应。

1.1 This test method covers the determination of the expansion of a specimen of carbonate rock while immersed in a solution of sodium hydroxide (NaOH) at room temperature. The length changes occurring during such immersion indicate the general level of reactivity of the rock and whether tests should be made to determine the effect of aggregate prepared from the rock upon the volume change in concrete. 1.2 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard. 1.3 The text of this standard refers to notes and footnotes that provide explanatory material. These notes and footnotes (excluding those in tables and figures) shall not be considered as requirements of this standard. 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. ====== Significance And Use ====== 5.1 This test method is intended to give a relatively rapid indication of the potential expansive reactivity of certain carbonate rocks that may be used as concrete aggregates. The test method has been successfully used in ( 1 ) research and ( 2 ) preliminary screening of aggregate sources to indicate the presence of material with a potential for deleterious expansion when used in concrete. 5.2 The test method is intended as a research and screening method rather than as the basis of a specification requirement. It is intended to supplement data from field service records, petrographic examinations according to Guide C295/C295M , and tests of aggregate in concrete according to Test Method C1105 . 5.3 Alkalies participating in the expansive reactions with aggregate constituents in concrete usually are derived from the hydraulic cement; under certain circumstances they may be derived from other constituents of concrete or from external sources. Two types of alkali reactivity of aggregates are recognized: ( 1 ) alkali-silica reaction involving certain siliceous rocks, minerals, and artificial glasses, and ( 2 ) alkali carbonate reaction involving dolomite in certain calcitic dolomites, dolomitic limestones, and dolostones. This test method is not suitable as a means to detect alkali-silica reaction.