METHOD OF DEVELOPMENT OF TECHNOLOGY FOR THE DEVICE OF ROAD STRUCTURES USING ASPHALT GRANULATE

Abstract

Statement of the problem. The currently used waste (asphalt granulate) for milling non-rigid pavements differs in its characteristics from hot and cold asphalt concrete mixtures as well as crushed stone. The used fleet of machines for compacting the material layer is characterized by a wide range of roller weights and roller parameters, which affects the compaction effect. Ensuring the quality of compaction depends on the compliance of the technological modes of the mechanized link of machines with the properties of the materials used. It is necessary to develop a technology for the device of layers using asphalt granulate and taking into account its properties, thickness, as well as the parameters of compaction machines. Results. The method of development of technology for the device of road structures in the reconstruction and repairs of highways with the use of asphalt granulate is considered. Based on experimental studies the dependence between the load and the deformation of the layer of material, deformation and compaction factor and the values of the angles of contact of the roller with the surface layer of the compacted material is identified with regard to its granulometric composition and thickness of the stacked layer. The simulation results are presented of the interaction of the roller rink with the sealing material obtained analytical dependence for the calculation of stresses in the contact zone of the roller with the material allowing one to set the parameters of the rollers depending on the properties of asphalt granulate.Conclusions. An analytical dependence is obtained for calculating the stresses in the contact zone of the roller with the asphalt granulate layer, which allows one to assign the parameters of the rollers depending on the properties of the material being laid. The suggested method for developing the technology of layer arrangement using asphalt granulate enables the required quality of compaction taking into account the properties of the material, the thickness of the layer to be laid and the parameters of compacted machines.