1.1 这种描述性命名法简要描述了矿物骨料所组成的一些更常见或更重要的天然和人工材料。这些描述为理解这些术语在混凝土骨料中的应用提供了基础。在适当的时候，讨论了在混凝土中使用天然和人造材料的潜在影响的简要观察。 注1: 这些描述描述了自然界中的矿物和岩石，以及通过改变天然材料的结构和成分制备的高炉渣或轻质骨料。有关轻质骨料的信息见规范 C330/C330米 , C331/C331M ，以及 C332 . 1.2 本标准不包括对辐射屏蔽混凝土中使用的骨料成分的描述。参见描述性术语 C638 . 1.3 以国际单位制表示的值应被视为标准值。本标准不包括其他计量单位。 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。 =====意义和用途====== 4.1 这种描述性命名法提供了通常应用于混凝土骨料的术语的信息。本标准旨在帮助理解术语的含义和意义。 4.2 许多描述的材料经常出现在没有显示描述中给出的所有特征的颗粒中，大多数描述的岩石等级从符合一种描述的品种到符合另一种描述，并发现了所有中间阶段。 4.3 在许多情况下，只有合格的地质学家、矿物学家或岩学家才能使用这些科学的仪器和程序对岩石和矿物进行准确识别。 然而，参考这些描述可能有助于指示或防止识别中的严重错误。骨料中组成材料的识别可能有助于表征其工程性能，但仅凭识别不能为预测骨料在使用中的行为提供唯一依据。任何类型或类型组合的骨料在使用中可能表现良好或较差，这取决于混凝土所处的环境、它们所嵌入的基质的物理和化学性质、使用时的物理状况以及其他因素。可能仅在总量中少量出现的成分可能会也可能不会决定性地影响其性能。 ASTM发布了混凝土中混凝土骨料性能的相关信息。 4.

1.1 This descriptive nomenclature provides brief descriptions of some of the more commonly occurring, or more important, natural and artificial materials of which mineral aggregates are composed. The descriptions provide a basis for understanding these terms as applied to concrete aggregates. When appropriate, brief observations regarding the potential effects of using the natural and artificial materials in concrete are discussed. Note 1: These descriptions characterize minerals and rocks as they occur in nature and blast-furnace slag or lightweight aggregates that are prepared by the alteration of the structure and composition of natural material. Information about lightweight aggregates is given in Specifications C330/C330M , C331/C331M , and C332 . 1.2 This standard does not include descriptions of constituents of aggregates used in radiation shielding concrete. See Descriptive Nomenclature C638 . 1.3 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this 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. ====== Significance And Use ====== 4.1 This descriptive nomenclature provides information on terms commonly applied to concrete aggregates. This standard is intended to assist in understanding the meaning and significance of the terms. 4.2 Many of the materials described frequently occur in particles that do not display all the characteristics given in the descriptions, and most of the described rocks grade from varieties meeting one description to varieties meeting another with all intermediate stages being found. 4.3 The accurate identification of rocks and minerals can, in many cases, be made only by a qualified geologist, mineralogist, or petrographer using the apparatus and procedures of these sciences. Reference to these descriptions may, however, serve to indicate or prevent gross errors in identification. Identification of the constituent materials in an aggregate may assist in characterizing its engineering properties, but identification alone cannot provide the sole basis for predicting behavior of aggregates in service. Aggregates of any type or combination of types may perform well or poorly in service depending upon the exposure to which the concrete is subjected, the physical and chemical properties of the matrix in which they are embedded, their physical condition at the time they are used, and other factors. Constituents that may occur only in minor amounts in the aggregate may or may not decisively influence its performance. Information about concrete aggregate performance in concrete has been published by ASTM. 4