Rheological and Thermo-Oxidative Aging Properties of Asphalt Modified with a Combination of Sasobit and Linear Low-Density Polyethylene

Research of different asphalt modifiers has been necessary for the attempt to construct durable roads with higher standards. Fischer Tropsch-paraffin wax (Sasobit) recently attracted considerable attention over polymer modification due its capacity lower energy requirements asphaltic mix construction. In this study, Sasobit was used recover performance as well workability 3 wt% linear low-density polyethylene (LLDPE) modified asphalt. A base binder a penetration grade 50/70 blended LLDPE and separately then combined dosages (1–3 wt%). The binders evaluated using conventional, rheological, thermal tests. As result, it found that loading wt%) into LLDPE-asphalt mixture steadily decreased ductility at 25 °C from 12 dmm 31 18 cm, respectively, softening point increased by 20% indicating improved high-temperature performance. temperature were since addition reduced viscosity 0.292 0.189 Pa.s (22% less). thermo-oxidative aging resistance showing less weight variation (less than 0.001%) after Rolling Thin-Film Oven Test (RTFOT) high retention (65%). Thermogravimetry (TG) kinetics analysis results indicated Sasobit-LLDPE delayed initial maximum decomposition 11 hence stability binders. Thus, proposed are suitable solution pavement construction in regions encounter changes.