Experience in Repairing Highways Using Cold Regeneration Technology in the Altai Republic

Abstract

Three main factors were taken into account cost, quality, and time when repairing the highway R-256 “Chuysky Trakt” in the Altai Republic. Repairs were carried out using various types of road constructions using cold recycling technology, implemented both at the near-road plant and directly on the road. The four types of structures are most common. The first type is asphalt and granulated concrete with a thickness of 20 cm using a mineral binder. The second one is asphalt-granulated concrete with a thickness of 15 cm using a combined binder. The third is with the use of wear layers of bitumen-mineral mixtures and leveling layers of asphalt concrete mixtures. The fourth - with the use of a combined binder and a layer of wear from the bituminomineral mixture with the use of polymer-bitumen binders. The use of cold regeneration technology of existing pavements allowed not only to restore their bearing capacity, but also to increase it by 50% to 56%, depending on the type of pavement design used.