The National Transport University Bulletin

Abstract

The article proposes a method of calculating the layer of the road surface from draining asphalt concrete. One of the main tasks of draining asphalt concrete is to remove water from the surface. It was based on the data on the maximum amount of rainfall during the year, and the method of calculating the required thickness of the draining asphalt concrete was presented. For this purpose, based on the analysis of Handbook No. 4, a map of Ukraine was developed according to the intensity of torrential rainfall, and the territory of Ukraine was also divided into zones according to the climatic conditions of the drainage asphalt concrete. Object of study − draining asphalt-concrete pavement of highways. Purpose − establish a method for calculating the required thickness of a layer of draining asphalt concrete and develop what is necessary for calculating the zoning of Ukraine for further high-quality implementation of this technology. Methods − experimental-analytical. Results – an analysis of the existing experience of using draining asphalt concrete, conditions of its use, was carried out. Theoretical studies of the process of calculating the thickness of draining asphalt concrete with a structure of interconnected open pores. The method of calculating the required thickness of the layer of draining asphalt concrete depending on the maximum amount of torrential precipitation in the territory of Ukraine is presented. Zoning has been developed according to the maximum intensity of torrential rains, climatic conditions of operation of draining asphalt concrete. Conclusions − precisely on the basis of data on precipitation throughout the year, it is necessary to calculate the required thickness of draining asphalt concrete. But, today, in Ukraine, there is not enough information, regulatory documents, directories and other regulatory framework regarding this type of asphalt concrete. Since the thickness of the layer of draining asphalt concrete must be determined taking into account the amount of precipitation in the area of construction, the transverse and longitudinal slope of the base, as well as the drainage properties, therefore it was advisable to consider the method of calculating the required thickness of the coating depending on the maximum amount of rainfall, which will allow accumulating data, possibly in the future, to include in the regulatory documents on the methods of research and design of these asphalt concretes, for the improvement and implementation of this technology as such. Since one of the main tasks of draining asphalt concrete is to remove water from the pavement, therefore, in further research, it is advisable to consider the method of determining permeability (horizontal and vertical), which would become one of the main methods of testing as an arranged layer of drainage pavement in quality control and clogging with sometimes, and made in laboratory conditions, to establish the dependence of permeability on residual porosity.

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