2021 U.S. Scrap TIre Workgroup (USSTWG)

2019 - Dickinson County Road Commission County Road 607 Project  EGLE Scrap Tire Grant Program provided half the cost -- or $325,000 -- of the $650,000 project, which used nearly 4,000 scrap tires.  "Our hopes are that this project will demonstrate that rubberized asphalt not only is smoother, quieter, and longer lasting than traditional asphalt, but can also be made economically," said Lance Malburg, an engineer with the Dickinson County Road Commission.  Project partners:  Dickinson County Road Commission  Michigan Technological University  Asphalt Plus LLC  BAACO Construction Company  Three sections of road were paved for comparison and testing using:  Conventional hot mix asphalt base top layer.  Engineered crumb rubber hot mix asphalt base with conventional top layer.  Hot mix base with engineered crumb rubber as both the base and top layers.  The ground tire powder was added to the asphalt at the plant. Known as a "dry" process, it is easier to control and monitor, and is less expensive than adding the rubber through the liquid asphalt. Using the powder also makes the process easier to duplicate by other asphalt contractors.  The sections will be compared, monitored, and tested by MTU and the Road Commission, specifically watching for cold weather cracking resistance of the two asphalt mixes. 11/1/2021 63