Abstract
. Asphalt concrete regeneration is a technology for processing old asphalt-concrete milled material, restoration involving and characteristics improvement for reuse during coating installation, as well as for other road works. Old asphalt concrete processing is a resource-saving technology that can significantly reduce, material consumption of road repairs and work related with road surfaces installations. The regenerated asphalt mix, in addition to arranging layers of pavement, can also be used to create road base upper layers. Depending on the method of regeneration and volume of old material used in the regenerated mixture preparation, it is possible to reduce the cost of restoring pavement by 30% compared to traditional technology, when work using a new asphalt mix, is performed. The main methods of asphalt concrete regeneration in [1 - 5]. Old asphalt concrete material regeneration can be carried out in two main ways: - at an asphalt concrete plant, when old asphalt material processing previously removed (by cold or hot milling) is carried out in stationary or mobile mixing plants; - at the working place, when the regeneration of the old asphalt material is carried out directly in the process of laying the coating with the help of special road construction equipment (thermoprofilers, remixers, recyclers, etc.). Old asphalt pavement milling can be carried out in a cold or hot way. In the case of hot milling, infrared heaters are used to preheat asphalt concrete. There are several basic regeneration methods of old asphalt concrete at the work site: - hot regeneration; - method of thermoplasticization - hot regeneration of old asphalt material with addition to its composition a plasticizer; - thermomixing method - hot regeneration of old asphalt material with addition a new asphalt mix, as well as rubble, bitumen binder and plasticizer; - thermoprofiling method - hot regeneration of old asphalt material without adding a new asphalt mix. - cold regeneration - restoration of old asphalt material without heating with addition organics and mineral binders, stone material, as well as various impurities that improve regenerated material characteristics.
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