Vulcan Materials Company is one of the leading producers of construction aggregates in the United States. It specializes in the production of crushed stone, sand and gravel. Vulcan Materials Company also provides railroad ballasts, recycled materials, ready-mix concrete, and asphalt coating and paving materials, as well as a variety of agricultural, chemical and industrial materials. The company s products are used in the construction of houses, roads, bridges, schools, hospitals, parking lots, sewer systems, and airports and runways. It also provides technical support and quality control programs to clients. In addition, the company maintains a technical service center that is staffed by geologists, civil engineers and laboratory technicians. Vulcan Materials Company maintains a division in Knoxville, Tenn.