Also known as concrete stone, washed base material, washed stone, D467, D57, D67. Pattison produces Concrete Stone from Ordovician Dolomitic Limestone in our state-of-the-art, jaw/cone crushing plant. Our plant features sophisticated compression crushing technology that reduces fines and increases fractured faces.
Washed Rocks Production
This material is frequently ordered with specific physical properties. Pattison’s quarry offers a variety of ledges that meet these requirements. Material sourced from these ledges is durable, has minimal deleterious materials and performs above requirements on freeze thaw, abrasion, specific gravity and absorption tests.
Washed Rocks Certifications
This product meets Iowa’s highest usage designations as Class 3i and 3iB. It can be used in interstate highway paving, bridge decks and overlays. Pattison’s Washed Rocks is approved for FAA airport paving and other federal projects. It is certified for Department of Transportation work in Iowa, Missouri, Nebraska, Minnesota.
Direct Rail Loadout
With our direct to rail transfer system, WASHED ROCKS products move quickly from production to rail loading with minimal handling, dramatically reducing product degradation, and material handling costs. Here’s what Wikipedia has to say