Evaluation of Recycled Rubber in Asphalt Concrete – Black Hawk County - Project HR-330B Author(s): Anderson, Chris Origin: Iowa Date: December, 1992 Categories: Performance Key Words: Asphalt-rubber cement, recycled tires, ground tire rubber, crumb rubber modifier Summary: Reports on the construction of an asphalt-rubber hot mix test section on IA 21, Blackhawk County. Three test sections were constructed, two of the test sections used asphalt-rubber in the binder and surface courses and the third test section was constructed using conventional asphalt concrete as a control. The report includes preconstruction history, laboratory mix designs, construction observations, construction test results and costs.