Home – Home – Jornals – Chemistry for Sustainable Development 2021 number 6

This paper presents experimental data on the physicochemical properties of oxidized bitumen produced by the oil refinery plants OJSC TAIF-NK and OJSC Syzran Oil Refinery before and after aging in a thin film in the presence of the developed additive Adgezolin, as well as in the composition with polymer-bituminous binders obtained on the basis of these bitumens. The domestic adhesive additives BP-KSP, Adgezol-6 and imported additive Wetfix (Sweden) were used for comparison. The most significant change (∆ T ) in brittleness temperature (5.1 °С) was found in bitumen samples modified with 0.35 mass % Adgezol-6 and 0.5 mass % Wetfix additives, which does not correspond to the methodological document of the road construction industry (ODM 218.2.004-2006). In addition, the study of the qualitative properties of polymer-bitumen binders in comparison with the original bitumen shows that the addition of polymers to the studied bitumen has a positive effect on ∆ T of softening after heating; this indicator is within the state standard GOST (not more than 5 °C). The introduction of additives also improves the aging stability of the bitumen: introduction of Adgezolin additive in an amount of 0.8% causes a significant decrease in ∆ T of softening. Comparative analysis of the efficiency with respect to industrially developed domestic and foreign additives allows us to emphasize the high quality of modified bitumen based on Adgezolin additive. Malacometric indicators for evaluating the quality of bitumen modified with the developed Adgezolin additive characterize less severe aging of bitumen binders in comparison with the considered additives, which allows us to recommend it for industrial approval.