Action Materials

United States

1 ¼” minus crushed basalt is also known as Crushed Surfacing Base Course (CSBC). Similar to 58” minus CSTC, this material is made to Washington State DOT specifications. It is commonly used under 58” minus as a base material where more depth is needed to build up a grade or drivewayroad bed. Like 58” minus, 1 ¼” minus compacts well and creates a hard, stable surface.

This material is made and screened in the same process as 58” minus crushed basalt, but is made from recycled concrete. It performs similarly to crushed basalt, and is made to Washington State DOT specifications.

Crushed asphalt is made from recycled asphalt, and is crushed using the same process as 58” minus or 1 ¼” minus basalt. Crushed asphalt is commonly used to surface driveways or parking areas, and works well for that purpose. Because the oils in the asphalt help the material bind together, this product typically has a denser and more durable surface than crushed rock.