1.1 本规范涵盖了用于建筑结构砌体的内部和外部使用的实心干铸混凝土建筑砖，由硅酸盐水泥、水和合适的矿物骨料制成，包括或不包括其他材料。 注1: 规格 C1634 说明了饰面应用和其他暴露中使用的混凝土饰面砖（之前在本标准的早期版本中称为N级——用作外墙的建筑贴面和饰面单元，以及在高度较高的地方使用- 强度和对湿气渗透和严重霜冻作用的抵抗力是期望的）。本规范不同于 C1634 因为它涉及非饰面实用应用中使用的混凝土建筑砖的性能（之前在本规范的早期版本中称为S级——用于要求中等强度和抗冻性和透湿性的一般用途）。 1.2 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。 注2: 本规范涵盖的混凝土建筑砖由轻质或正常重量的骨料制成，或两者兼而有之。 注3: 当需要特定特征时，如密度分类、高抗压强度、外观或粘合的表面纹理、饰面、颜色、耐火性、绝缘性、声学性能或其他特殊特征，这些特性应由买方单独规定。应就具有所需特征的混凝土建筑砖的可用性咨询供应商。 1.3 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。 1.4 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 solid, dry-cast, concrete building brick intended for interior and exterior use in constructing structural masonry, and are made from portland cement, water, and suitable mineral aggregates with or without the inclusion of other materials. Note 1: Specification C1634 addresses concrete facing brick used in facing applications and other exposures (previously referred to in earlier editions of this standard as Grade N—for use as architectural veneer and facing units in exterior walls and for use where high-strength and resistance to moisture penetration and severe frost action are desired). This specification differs from C1634 in that it addresses properties for concrete building brick used in non-facing, utilitarian applications (previously referred to in earlier editions of this specification as Grade S—for general use where moderate strength and resistance to frost action and moisture penetration are required). 1.2 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. Note 2: Concrete building brick covered by this specification are made from lightweight or normal weight aggregates, or both. Note 3: When particular features are desired, such as density classification, high compressive strength, surface textures for appearance or bond, finish, color, fire resistance, insulation, acoustical properties, or other special features, such properties should be specified separately by the purchaser. Suppliers should be consulted as to the availability of concrete building brick having the desired features. 1.3 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. 1.4 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.