本规范涵盖用于路面或基层、公路桥梁和附属结构的水硬性水泥混凝土细骨料的质量和级配。本规范供承包商、混凝土供应商或其他买方使用，作为描述所提供材料的采购文件的一部分。注1:本规范被认为足以确保大多数混凝土的材料符合要求。人们认识到，对于某些工作或在某些地区，它可能比需要的限制更多或更少。例如，当美学很重要时，可以考虑对可能污染混凝土表面的杂质施加更严格的限制。说明人应确定，在级配、物理或化学性质或其组合方面，工程区域内已提供或可提供规定的骨料。

This specification covers the quality and grading of fine aggregate for hydraulic cement concrete used in pavements or bases, highway bridges, and incidental structures.This specification is for use by a contractor, concrete supplier, or other purchaser as part of the purchase document describing the material to be furnished.Note—This specification is regarded as adequate to ensure satisfactory materials for most concrete. It is recognized that, for certain work or in certain regions, it may be either more or less restrictive than needed. For example, where aesthetics are important, more restrictive limits may be considered regarding impurities that would stain the concrete surface. The specifier should ascertain that aggregates specified are or can be made available in the area of the work, with regard to grading, physical or chemical properties, or combination thereof.Note—Definitions of terms used in this specification may be found in ASTM C125.This specification is also for use in project specifications to define the quality of aggregate, the nominal maximum size of the aggregate, and other specific grading requirements. Those responsible for selecting the proportions for the concrete mixture shall have the responsibility of determining the proportions of fine and coarse aggregate and the addition of blending aggregate sizes if required or approved. Specifications for coarse aggregate are provided in AASHTO M 80.