Cold Recyclern or Cold-in-Place is the process of maintaining an old and loose pavement surface. The process involves milling and crushing the old pavement structural layer .i.e., the surface layer and part of the base layer. Unlike the other pavement maintenance process that uses new materials for the restoration of the old pavement, cold recycling uses the same materials from the old pavement. However, a few new materials, such as binding agents, are added to improve the quality of the new pavement.
Cold recycling uses cold recyclers as the main piece of equipment. These are machines designed to mill and ground concrete and asphalt surfaces. The machine is designed with a rotating drum, which is fitted with sharp milling bits and teeth. These are the cutter tools that do the actual cutting of the pavement surface. When the drum starts rotating as the cold recycler moves, the cutter tools will be milling and grinding the old surface.
For the cold recycling in-plant, the old pavement layer is first removed using the cold milling machine and then taken to the mixing plant. In most cases, the mixing plant is brought to the site to save time and the transport cost. Once the material is treated, it is taken back to the site for restoration of the pavement. Both cases take a short time to finish road restoration compared to most of the alternative methods.
However, you must have the right cold recycler for the restoration work. You also need to check the grade of the road, traffic, and climate when restoring the road. These are factors that will determine the kind of cold regeneration you need to do.