Встановлення складу епоксиасфальтобетоних сумішей для їх застосування в якості тонкошарового покриття на автомобільних дорогах та мостах

Abstract

Introduction. This paper presents the results of the analysis of world and domestic experience, theoretical and practical research to assess the impact of thermosetting additives on the main indicators of bitumen and physical and mechanical properties of asphalt concrete. The optimal compositions of asphalt concrete with increased physical and mechanical properties for their use as thin-layer coatings on road bridges have been established. Attention is also paid to the technology of preparation of epoxy asphalt concrete with different methods of introduction of epoxy components. Problem Statement. Ensuring increased track resistance, strength and crack resistance of pavements on road bridges today is one of the most important problems facing scientists and road workers in Ukraine. An urgent task is to improve the performance of these coatings in order to extend their service life and minimize the frequency of repair work, which, especially on bridges, cause great difficulties and require significant additional costs. Objective. There is no doubt that when using epoxy asphalt concrete as a thin-layer pavement, we get a strong, flexible surface, resistant to cracking and rutting. However, this is not yet a sufficiently researched material for its possible wide application, as it requires a special approach to the establishment of the composition and technology of its preparation. Materials and methods. Asphalt concrete mixture using thermosetting modifiers for its use as a thin-layer coating on orthotropic or reinforced concrete slab of the carriageway of the bridge. Results. An analytical review of domestic experience and the experience of other countries to improve the quality of pavements on road bridges, increase their durability, as well as improve economic efficiency in the use of epoxy-asphalt mixtures. Comprehensive studies have been conducted to establish their optimal composition. Conclusions. The application of a thin-layer coating on an orthotropic or reinforced concrete slab of the carriageway of the bridge made of epoxy-asphalt-concrete mixture requires special attention in establishing the optimal selection of its composition and cooking technology. Particular attention should be paid to ensure the required viability of the epoxy-asphalt mixture, the use of the desired hardener, which affects its properties, determining the required number of thermosetting modifiers, determining the duration of curing depending on temperature.