Introduction. In the introduction to the article, the briefly performed comparative analysis of the road asphalt concrete cold recycling technologies was adduced and also the actuality of the implementation of widened nomenclature of such technologies in the Ukraine was outlined.
Problem statement. The issue of the article concerns processes and materials for technologies of the full-depth reclamation of flexible road pavements using cold recycling trough full depth of asphalt layer/layers including the underlying layers of granular materials as required.
Purpose. The aim of the article is to analyze the technological parameters of processes of full-depth reclamation (FDR) and also general requirements for reclaimed materials especially those concerning the estimation of their thermorheological properties.
Results. The methods of the reclaimed materials stabilization were examined which, in accordance with the FDR technologies, should be divided in mechanical and those performed with the stabilizing agents. The types of pavement defects were defined under presence of which the application of FDR technologies has been recognized highly effective.
The concise analysis of general requirements for reclaimed materials was performed with setting off the materials subjected to special requirements for grading. Also, the technological particularities of processes of the full-depth reclamation were stated which should be attributed to the technical characteristics of road equipment, the road pavement condition, and reclaimed mixtures quantitative proportions as well. According to the analysis of the test methods of reclaimed materials stabilized by bitumen using foamed bitumen, the role of the thermoreological uniformity of cold recycled mixtures for their proper design was shown.
Conclusions. In the conclusions, the widened possibilities of the cold recycling performed via the FDR technologies were designated which enable the full-depth rehabilitation of a flexible road pavement with asphalt concrete layers involving granular materials from the underlying layers as required. The reclaimed materials obtained by the FDR technologies mostly undergo stabilization that can be accomplished by several means including the complex stabilization. Thus obtained reclaimed materials shall be used in a road base layer.
The parameters of the FDR processes differ from those of other cold recycling technologies performed in-situ mainly due to the technical specifications of road equipment giving deeper capture of materials during pulverization and mixing thus providing much variability of incoming materials.
The analysis of data regarding the composition, properties and methods of testing of the by the cold recycling reclaimed materials indicates the necessity for standardization of thermorheological uniformity for such materials.
