Justification of the direction of rotation of the working body of the combined sealing equipment for asphalt concrete mixtures

The article deals with the following aspect of the work of the developed combined compacting equipment for asphalt concrete mixtures: research and substantiation of the optimal direction of rotation of working bodies from the point of view of the quality of the finished pavement. It is proposed to use smooth rollers of multiple impact rotating around their own axes with eccentricity as working bodies under consideration. The presented data and schemes give a visual representation of the most important processes and phenomena affecting the ejection of material in front of the working body and, as a consequence, the size of the wave formation prism. This parameter is chosen as an indicator of quality assurance of the finished coating. A laboratory bench was designed and constructed, which allowed to conduct a number of experiments on the formulated methods. The design of the stand, due to its flexibility and a wide list of adjustable parameters, allows for in-depth analysis and observation of the work of the compacting organ in the form of a roller with an offset axis of rotation. Two experiments with five repetitions each were conducted, and the results were recorded and systematized. The analysis of the obtained results confirms the hypothesis that compaction by rotating working body should be performed from the unconsolidated material to the compacted one. This will reduce the number of coating defects (such as cracks), increase the evenness and smoothness of the coating, and reduce the delamination of the compacted material.