aggregate base

Aggregate base is typically composed of crushed rock capable of passing through a rock screen. The component particles will vary in size from 3/4 inch down to dust.

1. The aggregate base must be compacted properly to ensure road durability.
   骨料基层必须充分压实以确保道路的耐久性。
2. Engineers tested the aggregate base for quality before paving began.
   在开始铺路前，工程师测试了骨料基层的质量。