Mastic asphalt concrete on high viscosity special and compound petroleum bitumen

Abstract

Problem. Mastic asphalts are effective as waterproof layers of the road construction. These materials are characterized by high deformability because of a high content of bitumen. Viscosity of a binder in a composition of mastic asphalt concrete can be raised to decrease deformability of a layer. There is no production of high-viscosity road bitumen in Ukraine. In this case to obtain high-viscosity bitumen viscous road bitumen can be composed with construction bitumen. Goal. The goal of the research is to set the ability to produce high-quality mastic asphalts by using Ukraine-made bitumen with no polymer. The properties of produced asphalt concretes must meet the requirements of SOU 42.1.37641918-106:2016 and DSTU EN 13108-6:2018. Methodology. For this research four types of bitumen are used. Three of them are produced by “Lotos Asphalt” (Poland): high-viscous (20/30; 35/50) and special (“Unibit” 35/50-57/69), the fourth is the made-in-Ukraine compounded bitumen. Ukrainian bitumen was made by compound of road bitumen (БНД 60/90) and constructive bitumen (БНС 90/10). The mineral aggregates of the mastic asphalt concrete consist of granite crushed stone 5-10 mm grade, crushed granite sand 0-5 mm grade and limestone powder. The properties of mastic asphalt concrete were determined according to SOU 42.1.37641918-106:2016 and DSTU EN 13108-6:2018 Results. The significant influence of the amount, viscosity and type of bitumen in the composition of the mastic asphalt mixture on the physical and mechanical properties of the mastic asphalt concrete is shown. An opportunity of producing high-quality mastic asphalt concrete based at the compound bitumen is found out. The compound bitumen consists of 65 % road bitumen (БНД 60/90) and 35 % of construction bitumen (БНС 90/10). Originality. The comparison of the physical and mechanical properties of the mastic asphalt concrete based on the European bitumen and the Ukraine-made compound bitumen indicates a similarity of the obtained data. It approves the novelty of research. Practical value. By the results of the research the compound bitumen allows to produce high-performance mastic asphalt concrete. The properties of such an asphalt concrete are equal to the asphalt concrete based on high-viscous and special European bitumen.