Rubber Modified Asphalt Concrete, Route I-44, Laclede County – Construction Phase Report Author(s): Shelton, Mark Origin: Missouri Date: November, 1993 Categories: Performance Key Words: Rubber modified asphalt Summary: Test sections are overlays over pcc and consist of three inches of type I-B asphaltic concrete binder courses with two inches of rubber modified asphalt concrete (RMAC) surface with the dry process. A section of the project used 1 ¼ inches of type I-C asphaltic concrete binder course with 1 ¾ inches of asphalt rubber concrete (ARC) surface with the wet process. Mix designs were provided by the asphalt-rubber supplier and approved by the Missouri Highway and Transportation Department. For this project, the contractor provided a performance warranty. RMAC flushed under the roller until the asphalt content was reduce by 0.5% below the job mix formula. The project will be periodically evaluated for performance. Mix designs and test data are included.