ASPHALT MIXTURES AND ASPHALT CONCRETE USING OIL RESIDUES AND BITUMEN MODIFIED WITH MALEIC ANHYDRIDE AND POLYETHYLENE GLYCOLS

Abstract

A number of problems arise during the production and use of petroleum road bitumen. One of them is unsatisfactory performance characteristics, mainly heat resistance, plasticity, elasticity, and adhesion between the binder and the surface of the mineral material. With the increase in traffic intensity, the growth of heavy traffic volumes, the weight of cars, along with the impact of weather and climatic factors on the structure, this leads to the destruction of the road surface. One of the most promising areas in improving the quality of binders to obtain pavements with improved performance characteristics is their modification with polymeric materials. However, the use of modifiers is limited due to their high cost. Therefore, it is important to find inexpensive substances that would improve the performance characteristics of bitumen. This work is devoted to a completely new binder for asphalt mixtures, including crushed stone mastic mixtures. As a binder, we used raw materials for the production of bitumen - tar, modified with maleic anhydride and polyethylene glycol. The design of crushed stone and mastic asphalt mixtures using the obtained binders was carried out, and samples of crushed stone and mastic asphalt concrete were formed from them and tested. It was found that when binders were obtained from tar by modifying it with maleic anhydride and polyethylene glycol, crushed stone mastic mixtures with lower strength values were obtained compared to binders obtained by modifying oxidized bitumen. Comparison of crushed stone and mastic mixtures obtained using SBS modified bitumen and the studied binders showed that the use of the studied binders (oxidized bitumen modified with maleic anhydride and maleinized oxidized bitumen modified with polyethylene glycol) is characterized by lower water saturation and strength compared to the use of oxidized bitumen modified with SBS.