NC DEQ: Crushed Stone in NC

Shown here are many of the elements of aggregate quarries. Granitic ... Aggregates are construction materials of crushed stone, sand and gravel. ... One mile of typical 2-lane asphalt road with aggregate base requires about 25,000 tons.

sand & gravel

Construction of one mile of four-lane interstate highway requires 85,000 tons of ... to blast, crush, and screen hard rock to obtain the aggregate that the glaciers ... To open-pit mine for sand and gravel, four operations are necessary: (1) site...