INFLUENCE OF THE METHOD OF PRODUCING OF POLYMER-BITUMEN MATERIALS ON THEIR RHEOLOGICAL STRUCTURAL PARAMETERS

Abstract

In laboratory conditions, a comparison was made of methods for obtaining a polymer-bitumen binder PBB 60, obtained by mixing on the basis of an IKA homogenizer and the vortex layer method (ABC). We stud- ied the upper operating temperatures according to the PG (Performance Grade) classification, which are based on the Superpave methodology and make it possible to determine the shear stability by the rutting pa- rameters G*/sinδ and J_nr (MSCR test). The flow curves are constructed, with the help of which it is possible to describe the features of the rheological behavior of bituminous binders. It was suggested that in the ABC sam- ples, the degradation of the polymeric modifier in the bitumen binder occurs, leading to a decrease in its mo- lecular weight, along with a change in the structure of the original bitumen. Directions for further work are proposed in the direction of regulating the technological parameters of the vortex layer method in order to maintain the stability of the main characteristics of PMB, reduce molecular weight losses and ensure greater environmental friendliness and competitiveness of the technical and economic parameters of the bituminous binder manufacturing process.