OREGON'S HOT-IN-PLACE RECYCLING GUIDELINES

Recently, a study evaluated the potential of using hot-in-place recycling as a rehabilitation alternative in Oregon. Data from six Oregon DOT HIR projects constructed in 1992 and 1993 were analyzed. This included construction equipment, pavement properties, project selection, mix design, and the resulting performance. Only one HIR project was successful in rejuvenating the pavement and restoring ride quality. Problems encountered in the other projects show the importance of preliminary engineering and project selection for successful HIR. The lessons learned from these projects can be used as guidelines for selecting suitable candidate pavements for HIR.