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Rheological Characterization of Industrial Waste Modified Bitumen
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This study evaluated the rheological and physical properties of bitumen modified with polypropylene (PP) industrial waste at concentrations from 0% to 20% by weight, using conventional tests (softening point, penetration, ductility, flash and fire point) and dynamic shear rheometer analysis. PP addition was found to improve key performance characteristics of the asphalt binder, including rutting resistance at higher temperatures. The results support PP waste as a viable bitumen modifier, offering a potential use pathway for polypropylene plastic waste in road pavement applications.
The aim of this research is to evaluate the rheological properties of industrial waste modified bitumen. The varying proportion of polypropylene ranging from 0% to 20% of the weight of bitumen at 5% interval with 60/70 penetration grade was used. The asphalt binder modification was prepared by using high-speed mixer at temperature from 150 °C to 190 °C. The conventional test like softening point, penetration, ductility, flash and fire point test were carried out to assess the physical characteristics of polypropylene modified and unmodified bitumen, thereafter dynamic shear rheometer and rotational viscosity test were conducted to determine the rheological properties of bitumen. The result indicated that polypropylene has ability to improve the conventional properties of bitumen by increased penetration and ductility, decrease softening point and flash and fire point. Polypropylene modified bitumen provides better resistance against permanent deformation due to their increase in complex modulus and rotational viscosity and decrease in phase angle. It can be concluded that polypropylene modified bitumen could improve the level of performance and service life of the road.
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