本规范定义了各种类型公路和桥梁施工和维护中使用的粗骨料和筛分的标准尺寸机械分析中的骨料尺寸名称和范围。本规范在技术上等同于ASTM D 448-12。

This specification defines aggregate size designations and ranges in mechanical analyses for standard sizes of coarse aggregate and screenings for use in the construction and maintenance of various types of highways and bridges.