Crushing Metals

Crushed stone or angular rock is a form of construction aggregate, typically produced by mining a suitable rock deposit and breaking the removed rock down to the desired size using crushers. It is distinct from gravel which is produced by natural processes of weathering and erosion, and typically has a more rounded shape.

The following list gives a rundown of crushed stone grades and their best uses. While there may be slight variances in the naming convention of crushed stone the following are the most common names and sizes:
 Sizes are from 1″ down to fine particles. For road and paver base.
 Sizes from 3/4″ down to fine particles. For fill, road and slab base .
 Sizes are from 2″ to 4″. The largest of the crushed stone grades. For larger jobs such a culvert ballast .
  Sizes from 3/8″ to 1/2″. For concrete and asphalt mix.
 Sizes from 1/2″ to 2″. For drainage and railroad projects.
 Screenings or dust. For fabrication of concrete blocks and pavers and for riding arenas.
 Sizes of about 3/4″. For concrete and asphalt mix, driveways, landscaping and French drains.
 A mixture of stone dust and #57 stone. For driveways, roads and as a base for retaining walls. It can also be used to patch holes in paved areas. The dust mixes with the larger stone and settles well.