Justification of the use of elastically deformable belt in combined compaction equipment for asphalt concrete mixtures

Introduction. The process of asphalt concrete compaction is one of the most important in the construction of road surfaces. Traditional compaction methods include the impact of a row of rollers with smooth or vibrating drums. As an alternative, a variant for continuous compaction in the form of combined compaction equipment is proposed. The main working element of which is a drum with an offset axis of rotation, which has a multiple effect on the compacted material. This process is a complex, therefore, the article considers the hypothesis of substantiating the feasibility of using an elastic-deformable belt in combined compaction equipment for asphalt concrete mixtures.

Materials and methods. A laboratory stand was designed to conduct experimental studies, and a methodology for carrying out experiments demonstrating the effect of the presence of an elastically deformable belt element on the quality of the finished coating was developed. The size of the prism of the material ejection in front of the working element was chosen as a quality indicator, the value of which affects the uniformity of compaction and the integrity of the material structure.

Results. The data obtained by the experiments were recorded, systematized and analyzed for subsequent study, which showed the following: in the case of the presence of a layer between the working element and the compacted material - elastically deformable belt element, the size of the material prism in front of the roller is noticeably reduced, which shows an increase in the quality of the finished coating. Conclusion. As a result of the survey, the hypothesis about the necessity of the elastically deformable belt element in the design of combined compaction equipment for improving the quality of the finished asphalt concrete road surface was proven.

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