1.1 本指南旨在为评估不在规范范围内的火山灰和水工材料等替代辅助胶结材料提供技术方法 第618页 , C989/C989米 , 第124页 和 1866/186米 本指南提供了对ASCM进行全面评估的初步步骤，该评估为其在混凝土中的具体预期用途提供了尽职调查；然而，它没有评估所有类型混凝土混合物是否符合所有可能的性能标准。 1.2 以国际单位制表示的值应视为标准值。本标准不包括其他测量单位。 1.3 执行测试或满足本指南中的测试限值不应意味着测试材料符合规范要求 第618页 , C989/C989米 , 第124页 和 1866/186米 这些材料不应如此表示，应单独评估每个具体来源。 1.4 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建立适当的安全、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《国际标准、指南和建议制定原则决定》中确立的国际公认标准化原则制定的。 =====意义和用途====== 4.1 现有ASTM规范涵盖的补充胶结材料（SCM）包括飞灰、矿渣水泥、生的和煅烧的天然火山灰，包括煅烧粘土、硅粉和磨玻璃火山灰。这些材料的使用以及现有规范中规定的限制是基于从研究计划、现场测试和长期性能监测中获得的数据。 SCM在特定混凝土混合物中的性能通常通过施工前测试进行验证。本指南提供了一种评估现有规范未涵盖的材料财产的方法，以及评估这些材料在混凝土中的性能的方法。 4.2 如果ASCM在混凝土方面还没有显著的业绩记录，则应根据本指南进行全面评估，并应认识到，该ASCM可能会被引入特定项目或有限的市场，以初步证明其业绩。 用户应记住ASCM的预期最终用途，并使用适当的测试方法确定其适用性。通过本指南中概述的综合评估证明性能良好的ASCM可被视为能够进入更广泛的市场，并可被考虑纳入ASTM SCM标准。因此，证明可接受性能的试验程序应包括具有ASCM预期用途特定特性范围的混凝土混合物。 4.3 在缺乏长期耐久性或可接受的现场性能的情况下，建议潜在用户在使用ASCM时应用适当的风险管理和工程实践。

1.1 This guide is intended to provide a technical approach to the evaluation of alternative supplementary cementitious materials such as pozzolans and hydraulic materials that fall outside the scope of Specifications C618 , C989/C989M , C1240 , and C1866/C1866M . This guide provides the initial steps for a comprehensive evaluation of an ASCM that provides due diligence for its specific intended uses in concrete; however, it does not evaluate conformance to all possible performance criteria for all types of concrete mixtures. 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 Performing the tests or meeting the test limits in this guide should not imply that the material tested meets the requirements of Specifications C618 , C989/C989M , C1240 , and C1866/C1866M . These materials should not be represented as such and each specific source is to be evaluated separately. 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 ====== 4.1 Supplementary cementitious materials (SCM) covered under existing ASTM specifications are fly ash, slag cement, raw and calcined natural pozzolans including calcined clays, silica fume, and ground-glass pozzolan. The use of these materials, and limits established in existing specifications, are based on data obtained from research programs, field testing, and long term performance monitoring. Performance of SCM in specific concrete mixtures is commonly verified through preconstruction testing. This guide provides an approach to assessing the properties of materials that are not covered under existing specifications, and for assessing the performance of those materials in concrete. 4.2 If an ASCM does not yet have a significant record of performance in concrete, a comprehensive evaluation based on this Guide should be undertaken, and it should be recognized that this ASCM might be introduced for a specific project or into a limited marketplace to initially demonstrate its performance. The user should bear in mind the intended end use of the ASCM and use appropriate test methods to establish its suitability. An ASCM that demonstrates good performance through a comprehensive evaluation as outlined in this guide could then be considered to have access to broader markets and could be considered for inclusion in an ASTM standard for SCM. For this reason, the test program to demonstrate acceptable performance should include concrete mixtures with a range of characteristics specific to the ASCM’s intended use. 4.3 In the absence of long-term durability or acceptable field performance, prospective users are advised to apply appropriate risk management and engineering practice in the use of an ASCM.