Use of Asphalt-Rubber Products in Minnesota, The Author(s): Turgeon, Curtis M. Origin: Minnesota Date: September, 1989 Categories: Performance Key Words: stress absorbing membranes, asphalt-rubber, stress absorbing membrane interlayers, dense graded asphalt-rubber concrete, Plus-Ride Summary: This report is a compilation of completed and soon to be completed asphalt-rubber studies undertaken by the Minnesota DOT. The goals of each study vary with the manner in which the asphalt-rubber was utilized. Asphalt-rubber has been utilized in hopes of limiting reflective cracking by means of a stress absorbing membrane or a stress absorbing membrane interlayer. Using asphalt-rubber in a dense graded bituminous mixture was also attempted with the intent to limit reflective cracking while also resisting stripping due to greater film thickness on the aggregate and greater impermeability to water. The Plus-Ride ™ system of using granular rubber and a gap-graded aggregate in a plant-mixed bituminous surface was employed in hopes of creating a self-deicing pavement. The results from these test projects vary from site to site but overall the Department remains cautiously optimistic that asphalt-rubber can be an effective tool in pavement maintenance and reconstruction.