1.1 本规范涵盖了由按体积连续配料的材料制成的混凝土，在连续搅拌机中混合，并按照下文规定以新混合和未硬化的状态交付给买方。混凝土质量要求应符合下文规定或买方规定。当买方的要求与本规范不一致时，应以买方的规范为准。本规范不包括交付给买方后混凝土的浇筑、固结、修整、养护或保护。本文规定了配料精度和混合效率的测试和标准。 1.2 括号内所示的SI单位或英寸表示的值- 磅单位应单独视为标准单位。每个系统中所述的值可能不是完全等效的；因此，每个系统都应独立使用。将两个系统的值结合起来可能会导致不符合标准。 1.3 本规范涉及提供解释性材料的注释和脚注。这些注释和脚注（不包括表格和图中的注释和脚注）不应被视为本规范的要求。 1.4 本标准并不旨在解决与其使用相关的所有安全问题（如果有的话）。本标准的使用者有责任在使用前建立适当的安全和健康实践，并确定监管限制的适用性。 ( 警告 --新鲜的水硬性水泥混合物具有腐蚀性，长时间使用可能会对皮肤和组织造成化学灼伤。 2. ) 1.5 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====== A1.2 意义和用途 A1.2.1 这些测试和要求用于评估加载和操作程序；验证配比和指示系统的准确性；并确定混合均匀性是否因过度磨损或硬化混凝土积聚，或两者兼而有之而降低( 附注A1.1 ). 注A1.1: 配料搅拌装置的装载方法、适当的维护和其他因素可能会影响该装置生产均匀混合混凝土的能力。因此，使用这种测试方法不仅可以测量搅拌机的效率，还可以测量装载和操作机组的方法的综合效果。 A1.2.2 本附录提供了用于确定新拌混凝土均匀性时应用现有测试方法和实践所需的额外程序和注意事项。

1.1 This specification covers concrete made from materials continuously batched by volume, mixed in a continuous mixer, and delivered to the purchaser in a freshly mixed and unhardened state as hereinafter specified. Requirements for quality of concrete shall be either as hereinafter specified or as specified by the purchaser. When the requirements of the purchaser differ from this specification, the purchaser's specification shall govern. This specification does not cover the placement, consolidation, finishing, curing, or protection of the concrete after delivery to the purchaser. Tests and criteria for batching accuracy and mixing efficiency are specified herein. 1.2 The values stated in either SI units, shown in brackets, or inch-pound units are to be regarded separately as standard. The values stated in each system may not be 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. 1.3 This specification 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 specification. 1.4 This standard does not purport to address all the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health 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 use. 2 ) 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 ====== A1.2 Significance and Use A1.2.1 These tests and requirements are used to evaluate loading and operating procedures; verify the accuracy of proportioning and indicating systems; and determine if mixing uniformity has been degraded by excessive wear or by accumulations of hardened concrete, or both ( Note A1.1 ). Note A1.1: The method of loading the batching-mixing unit, proper maintenance, and other factors may have an effect on the ability of the unit to produce uniformly mixed concrete. For this reason, the use of this test method not only measures the efficiency of the mixer, but also the combined effect of the method of loading and operating the unit. A1.2.2 This annex provides additional procedures and cautions that are necessary in the application of existing test methods and practices when used to determine the uniformity of freshly mixed concrete.