Vulcan Materials Company Crushed Stone Vulcan Materials Company Visit Website 12502 Lloyd Road Sycamore, IL 60178 (815) 895-6501 (815) 895-3883 (fax) LinkedIn About About Vulcan Materials Company is the nation’s largest producer of construction aggregates—primarily crushed stone, sand and gravel—and a major producer of aggregates-based construction materials, including asphalt and ready-mixed concrete.