The development of polymer-modified asphalt cements compositions for Siberian road conditions
Abstract
The development of polymer-modified asphalt cements compositions for Siberian road conditions
Incoming article date: 09.03.2023The paper presents the results of research into the road polymer-modified asphalt (PMA) concrete, which is supposed to be used in the Siberian region, in particular, in the city of Krasnoyarsk and the Krasnoyarsk Territory. For the preparation of asphalt concrete, a polymer additive was used in the form of DST-30 grade thermoplastic elastomer. In addition, the results of studies using IR spectroscopic methods of the processes of interaction between bitumen and DST dissolved in industrial oil are presented. It has been established that the change in the physical properties of bitumen when DST is added to its composition is a consequence of chemical interaction in the studied composite binder. On the previously developed composition of the polymer bitumen binder, hot asphalt polymer concretes were prepared, which were studied for the main physical and mechanical indicators. The resulting compositions meet the regulatory requirements. When compared with the properties of asphalt concrete on "pure" bitumen, it was found that the introduction of a polymer additive leads to an increase in durability at 20 and 500C, water resistance and strength reduction at 00C, which indicates an increased crack resistance at a negative temperature of polymer-modified asphalt concrete compared to regular asphalt concrete. Recommendations on the factory technology for the preparation of asphalt concrete are given. The resulting compositions are proposed for industrial implementation by road maintenance bodies and firms in the city of Krasnoyarsk.
Keywords: polymer bitumen binder, asphalt polymer concrete, thermoplastics, compositions, properties, experiment, industrial oil, regression equations