Established in 1929, Florida Rock Industries offers a range of construction aggregates, concrete materials, and cement and calcium products. It operates a construction aggregates segment that provides mining and processing services, as well as distributes and sells sand, gravel and crushed stone. The company has a concrete products segment that deals in the production and sale of concrete blocks and prestressed and precast concrete. It also engages in the production and sale of portland and masonry cement, as well as deals in the sale of calcium products to the animal feed, paint, plastic and joint compound industries. Florida Rock Industries conducts operations in Florida, Virginia, Georgia, Maryland, Tennessee, Alabama, North Carolina, Illinois and Delaware. The company maintains a location in Gainesville, Fla.