Hot in-place recycling (HIPR) is defined as a process of correcting asphalt-pavement surface distress by softening the existing surface with heat, mechanically removing the pavement surface, mixing it with recycling agenda, possibly adding virgin asphalt or aggregate, and replacing it on the pavement without removing the recycled material from the original pavement site. The Asphalt Recycling and Reclaiming Association (ARRA) recognises three basic HIPR processes: heater-scarification, remixing, and repaving. HIPR may be performed as either a single-pass or a two-pass procedure. This synthesis will be of interest to administrators, pavement designers, highway, material, research, and specification engineers, and others interested in economical methods for reconstructing or rehabilitating asphalt concrete pavements. It describes the processes and equipment used for hot in-place recycling of asphalt concrete and provides information on mix designs, performance, and guidelines for its effective use. A significant amount of the information provided is based on the current practices of state highway agencies. As such, numerous case histories are included in the report. (A)
Abstract