Abstract
Abstract. Premature destruction of asphalt concrete can be caused by the aging of bitumen, which is associated with a change in the physical and chemical properties of bitumen. The article shows that in most cases, the improvement of the characteristics of asphalt concrete is achieved through the introduction of additives that affect the basic properties of the bituminous binder, such as penetration, softening temperature, viscosity. The influence of the chemical composition of the mineral filler on the rate of bitumen aging has been experimentally proved. The obtained research data show that the increase in the rate of aging of bitumen is influenced by the compounds of silicon and aluminum. On the other hand, metals such as iron and titanium contribute to the preservation of the initial plasticity of bitumen, and the accumulation of asphaltenes in the structure of the bitumen-mineral mixture slows down.
Highlights
IntroductionThe construction of a modern transport infrastructure requires a large amount of asphalt concrete with increased performance indicators
Asphalt concrete remains the most common material for road construction
Aging of bitumen and bitumen-mineral mixtures differs in the ratio of the duration of these periods
Summary
The construction of a modern transport infrastructure requires a large amount of asphalt concrete with increased performance indicators. This is due to an increase in the load on the pavement structure and the requirement to increase the operating time of the pavement before major repairs, to reduce the cost of work and used road materials, including asphalt concrete. [8-10] The aging process of bitumen can occur during the preparation of an asphalt mixture at high temperatures or during operation asphalt concrete. The last aging process is of great importance for the initial physical and mechanical properties of bitumen, the presence of polymer and stabilizing additives in the asphalt concrete mixture, and the chemical composition of stone materials used as coarse and fine aggregates. The content of silicon oxides in the composition of the rock is taken
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