Hanson Aggregates North America is a part of Hanson, which is one of the leading heavy building materials suppliers in the world. Hanson Aggregates North America is headquartered in Dallas, and produces aggregates, asphalt, ready-mixed concrete and cement. The company operates in more than 300 locations in Texas, Oklahoma, Arkansas, Louisiana, New Mexico and California. Its products include coarse aggregates, native and manufactured sand for ready-mix concrete, paving aggregate, rip-rap and cover stone, manufactured sand for brick and block producers, masonry sand, crushed stone road base material and railroad ballast. The company s Web site features aggregate and ready-mix concrete calculators. Hanson Aggregates North America has a location in Clarkdale, Ariz.