Vulcan Materials Company (formerly Birmingham Slag) is a company that supplies construction aggregates, such as crushed stone, sand, and gravel, and produces asphalt mix and ready-mixed concrete. Its products are used to build homes, offices, places of worship, schools, hospitals and factories, as well as infrastructure including highways, bridges, roads, ports and harbors, water systems, campuses, dams, airports, and rail networks. The company also produces calcium products for the animal feed, plastics, and water treatment industries.