1.1 本规范涵盖空心和实心（参见 5.3 和 5.4 )由水硬性水泥、水和矿物骨料制成的混凝土砌块，包括或不包括其他材料。混凝土砌体单元有三类:正常重量、中等重量和轻型。这些装置适用于承载和非承载应用。 1.2 本规范涵盖的混凝土砌块由轻质或正常重量的骨料制成，或两者兼而有之。 注1: 本规范的要求经过一个多世纪的研究、评估和制定，形成了此处定义的物理特性和属性。这些要求唯一适用于在使用低坍落度或零坍落度混凝土和本文定义的组成材料的设备上制造的混凝土砌块。混凝土砌块的许多性能属性都是在本规范的要求中间接说明或固有反映的，而无需直接测量、评估或评估。 将本规范的要求应用于在外观、用途或性质上可能与本规范所涵盖的产品相似的产品，可能无法解决确保在典型暴露环境下的真实应用中所产生的结构的性能或可用性所需的所有相关物理特性。使用本规范未涵盖的替代材料、制造方法或固化工艺制造的产品不应仅使用本规范中的要求进行评估；然而，新产品的开发人员可以将本规范的属性要求视为单元性能的开始基准。测试新产品的系统性能和单元性能是合理的。 1.3 本规范的文本引用了提供解释材料的注释和脚注。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 以英寸磅为单位的数值应视为标准。括号中给出的值是国际单位制的数学转换，仅供参考，不被视为标准。 注2: 当需要特定特征时，如外观或粘合的表面纹理、光洁度、颜色或特定特性，如密度分类、更高的抗压强度、耐火性、热性能或声学性能，这些特征应由买方单独规定。应就具有所需功能的装置的可用性咨询供应商。 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。

1.1 This specification covers hollow and solid (see 5.3 and 5.4 ) concrete masonry units made from hydraulic cement, water, and mineral aggregates with or without the inclusion of other materials. There are three classes of concrete masonry units: Normal Weight, Medium Weight, and Lightweight. These units are suitable for both loadbearing and nonloadbearing applications. 1.2 Concrete masonry units covered by this specification are made from lightweight or normal weight aggregates, or both. Note 1: The requirements of this specification have been researched, evaluated, and established for over a century, resulting in the physical properties and attributes defined here. These requirements are uniquely and solely applicable to concrete masonry units manufactured on equipment using low or zero slump concrete and the constituent materials defined herein. Many performance attributes of concrete masonry units are indirectly accounted for, or inherently reflected within, the requirements of this specification without direct measurement, assessment, or evaluation. Applying the requirements of this specification to products that may be similar in appearance, use, or nature to those covered by this specification may not address all pertinent physical properties necessary to ensure performance or serviceability of the resulting construction in real-world applications under typical exposure environments. Products manufactured using alternative materials, manufacturing methods, or curing processes not covered by this specification should not be evaluated solely using the requirements in this specification; however, developers of new products can consider the property requirements of this specification as a beginning benchmark for unit performance. It is reasonable to test new products for system performance as well as unit performance. 1.3 The text of this specification references notes and footnotes which provide explanatory material. These notes and footnotes (excluding those in tables and figures) shall not be considered as requirements of the standard. 1.4 The values stated in inch-pound units are to be regarded as standard. The values given in parentheses are mathematical conversions to SI units that are provided for information only and are not considered standard. Note 2: When particular features are desired such as surface textures for appearance or bond, finish, color, or particular properties such as density classification, higher compressive strength, fire resistance, thermal performance or acoustical performance, these features should be specified separately by the purchaser. Suppliers should be consulted as to the availability of units having the desired features. 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.