Armorstone® Wearing Course, Overlay Aggregate near Tacoma, .
Washington Rock now supplies calcined bauxite. Some states, like Washington State, require that calcined bauxite be used for high-friction surfacing treatments. Washington Rock now supplies both Armorstone and calcined bauxite to cover all of your needs. Read More on Our Blog "Q&A: Meeting the Demands of the Overlay Aggregate Industry" by ...