The National Transport University Bulletin

Abstract

Asphalt concrete mixtures are one of the most used materials during the construction of highways. For the production of these mixtures, coarse aggregate, fine aggregate, filler (mineral powder) and bitumen are usually used. In Ukraine, the material obtained by crushing sedimentary carbonate rocks is mainly used as a filler. At the same time, as a result of burning coal, millions of tons of dust-like waste - fly ash - are formed at power-generating enterprises of Ukraine. The grain composition of fly ash approaches the national requirements for filler. Complex laboratory studies confirmed the possibility of using fly ash as a filler in asphalt concrete mixtures, therefore the next stage of research consisted in the experimental implementation of asphalt concrete mixtures with fly ash. The disposal of secondary products of industry (waste) is intended to preserve natural resources and reduce the amount of waste that must be disposed of in special burial places. Recycling is encouraged by many countries in the European Union, which has relevant provisions in all directives relating to waste management. A key element in encouraging waste recycling is the "polluter pays" principle, which has been included in all Community directives on the management of safe and hazardous waste. In order to encourage recycling, many Member States have adopted specific environmental legislation, in particular, the payment of a waste disposal tax. To date, the issue of disposal of secondary industrial products has not been resolved in Ukraine, therefore a significant part of them is in landfills and carries a great risk for the environment, and only a small part is disposed of in construction projects, although for many years there has been a "State Targeted Economic Program for the Development of Automotive public roads of state significance for 2018–2022" and the order of the Cabinet of Ministers of Ukraine, which regulate the use of local materials, including secondary industrial products during the construction and repair of highways. In order to introduce fly ash during the construction and repair of highways, asphalt concrete layers with fly ash were laid during the repair of the access road to the passageway of the 1st block of DTEK Burshtynska TPP with a total length of 900 meters.

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