STUDY OF AGING PROCESSES OF DOMESTIC ADDITIVES FOR THE PREPARATION OF POLYMER BITUMEN

In this article, the aging process of domestic polymer additives used to produce polymer-bitumen binders (PBB) materials was investigated. The importance of studying aging was due to the need to increase the durability of road surfaces exposed to significant temperature and mechanical loads during operation. The RTFOT (Rolling Thin Film Oven Test) method, model 20-25720, was used in the work to simulate accelerated aging of PBB. The study examined various formulations using two grades of polypropylene, applied in an amount of 4%. The choice of this formulation is justified by the fact that the obtained physical and chemical characteristics meet the requirements of the standards ST RK 1126 and ST RK 1227 for polymer-modified bitumen (PMB). The final product received the BMP grade, which confirms its compliance with regulatory requirements and suitability for use in road construction. Analysis of the data obtained showed that polymer additives had a significant effect on the resistance of bitumen to aging. In particular, changes in the structure and properties of PBB materials were identified, indicating an increase in their resistance to thermal aging. The results of this study provided valuable data for further improvement of PBB formulations aimed at increasing the service life and reliability of road surfaces.