1.1 该试验方法包括通过测量混凝土棱柱的长度变化来确定粗骨料或胶结材料-骨料组合对膨胀碱-碳酸盐反应的敏感性，该反应涉及与碱（钠和钾）相关的氢氧根离子以及某些钙化白云石和白云质石灰石。 1.2 如本文所述进行的试验结果应构成决定是否可在硅酸盐水泥混凝土施工中使用试验中的粗骨料或混凝土制造材料的特定组合的部分依据。有关结果的解释，请参阅指南 C1778 . 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）不应被视为本标准的要求。 1.4 单位-- 以国际单位制表示的数值应视为标准。本标准不包括其他计量单位。当引用组合标准时，测量系统的选择由用户根据参考标准的要求自行决定。 1.5 本标准并不旨在解决与其使用相关的所有安全问题（如有）。本标准的使用者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。 1.6 本国际标准是根据世界贸易组织技术性贸易壁垒委员会发布的《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。 ====意义和用途====== 4.1 文献中描述了骨料的两种碱反应性:涉及某些硅质岩石、矿物和人造玻璃的碱-硅反应 ( 1. ) , 3. 以及某些钙化白云石和白云质石灰岩中涉及白云石的碱-碳酸盐反应 ( 2. ) 。不建议将此试验方法作为检测因碱-二氧化硅反应而易膨胀的组合的方法，因为Buck报告的工作中没有对其用途进行评估 ( 2. ) .本试验方法不适用于不含碳酸盐岩或由碳酸盐岩组成的骨料（见描述性术语 C294 ). 4.2 此测试方法包含两种方法。方法A用于评估粗集料对碱-碳酸盐反应的敏感性。方法B是评估混凝土施工中使用的混凝土制造材料的特定组合的性能。但是，规定在需要时使用替代材料。 该试验方法通过在可能与现场条件不同的规定实验室养护条件下进行的试验，评估由碱-碳酸盐岩反应引起的混凝土膨胀的可能性。因此，实际的现场性能不会由于润湿和干燥、温度、其他因素或这些因素的组合的差异而重复。 4.3 当来源的骨料样品已通过岩相检验确定含有能够参与潜在有害的碱-碳酸盐岩反应的成分时，使用该试验方法具有特别的价值，指南 C295/C295M ，通过岩石圆柱体试验，试验方法 C586 ，按服务记录；或者通过这些的组合。 4.4 如本文所述进行的试验结果应构成决定受试骨料是否可用于硅酸盐水泥混凝土施工的部分依据。有关结果的解释，请参阅指南 C1778 . 4.5 在试验结束时，按照惯例对混凝土进行岩相检验可能是有用的 C856/C856M 以及以下指南的总和 C295/C295M 以确认引起混凝土膨胀行为的骨料（如有）与已知有毒膨胀碱的岩石学和化学性质相当- 碳酸盐反应岩。重要的是要检查潜在活性二氧化硅的存在，这些二氧化硅在传统透射光光学显微镜检查的规模下可能不一定可见。 4.6 该试验方法的研究、评估、精度和偏差说明是在破碎的碳酸盐粗骨料上进行的 ( 3. ) 因此，从开采的碳酸盐岩中获得的含破碎筛的人造细骨料或天然砂的碱-碳酸盐反应膨胀的评估结果是未知的。此外，本试验适用于含疑似碱性碳酸盐岩的砾石- 碳酸盐的反应性是未知的，并且迄今为止还没有进行评估。

1.1 This test method covers the determination, by measurement of length change of concrete prisms, the susceptibility of a coarse aggregate or cementitious materials aggregate combinations to expansive alkali-carbonate reaction involving hydroxide ions associated with alkalies (sodium and potassium) and certain calcitic dolomites and dolomitic limestones. 1.2 Results of tests conducted as described herein should form a part of the basis for a decision as to whether or not the coarse aggregate or specific combinations of concrete-making materials under test can be used in portland cement concrete construction. Interpretation of results can be found in Guide C1778 . 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 the standard. 1.4 Units— The values stated in SI units are to be regarded as the standard. No other units of measurement are included in this standard. When combined standards are cited, the selection of measurement system is at the user's discretion subject to the requirements of the referenced 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. ====== Significance And Use ====== 4.1 Two types of alkali reactivity of aggregates have been described in the literature: the alkali-silica reaction involving certain siliceous rocks, minerals, and artificial glasses ( 1 ) , 3 and the alkali-carbonate reaction involving dolomite in certain calcitic dolomites and dolomitic limestones ( 2 ) . This test method is not recommended as a means to detect combinations susceptible to expansion due to alkali-silica reaction since it was not evaluated for this use in the work reported by Buck ( 2 ) . This test method is not applicable to aggregates that do not contain or consist of carbonate rock (see Descriptive Nomenclature C294 ). 4.2 This test method contains two methods. Method A is used to evaluate the susceptibility of a coarse aggregate to alkali-carbonate reaction. Method B is to evaluate the behavior of specific combinations of concrete-making materials to be used in concrete construction. However, provisions are made for the use of substitute materials when required. This test method assesses the potential for expansion of concrete caused by alkali-carbonate rock reaction from tests performed under prescribed laboratory curing conditions that will probably differ from field conditions. Thus, actual field performance will not be duplicated due to differences in wetting and drying, temperature, other factors, or combinations of these. 4.3 Use of this test method is of particular value when samples of aggregate from a source have been determined to contain constituents that are regarded as capable of participation in a potentially deleterious alkali-carbonate rock reaction either by petrographic examination, Guide C295/C295M , by the rock cylinder test, Test Method C586 , by service record; or by a combination of these. 4.4 Results of tests conducted as described herein should form a part of the basis for a decision as to whether or not the aggregate under test can be used in portland cement concrete construction. Interpretation of results can be found in Guide C1778 . 4.5 At the conclusion of the test it may be useful to conduct petrographic examination on the concrete following Practice C856/C856M and the aggregate following Guide C295/C295M to confirm that the aggregate causing expansive behaviour of the concrete, if any, is comparable to the petrography and chemistry of known deleteriously expansive alkali-carbonate reactive rocks. It is important to check the presence of potentially reactive silica that may not necessarily be visible at the scale of conventional transmitted light optical microscopy examination. 4.6 The research, evaluation, and precision and bias statement for this test method were done on crushed quarried carbonate coarse aggregate ( 3 ) . Therefore, the results of evaluating alkali-carbonate reactive expansion of manufactured fine aggregate or natural sand containing crusher screenings derived from quarried carbonate rocks is unknown. Further, the applicability of this test to gravels containing carbonate rocks suspected of being alkali-carbonate reactive is unknown and as far as is known has not been evaluated.