INCREASING ROADPERFORMANCE USING WASTEPLASTIC-COATED BITUMEN AGGREGATE WITH TITANIUM DIOXIDE

Abstract

Vehicle pollution and the management of plastic waste are two of the most serious environmental problems facing the world today.These problems not only threaten
the ecosystem but also create significant negative effects to people and other living beings. This study examines bituminous road construction using waste plastic and
titanium dioxide (TiO₂).To provide photocatalytic and self-cleaning properties, TiO₂ has been included either as a nano-additive in the binder or as a surface coating.
Thermoplastic wastes, including Low-Density Polyethylene (LDPE) and High-Density Polyethylene (HDPE), were shredded and mixed with hot bitumen. According
to previous studies, Stiffness, Marshall stability, rutting resistance, and binder-aggregate adhesion are all enhanced by plastic-coated aggregates. Through
photocatalysis, TiO₂ also helps reduce nitrogen oxides (NOx) and organic pollutants; however, improvement is needed to increase its dispersion and long-term
durability.The present research shows a feasible and reliable approach from laboratory testing to material selection. The results of the experiment indicate that Waste
Plastic-Coated Bitumen Aggregate (WPCBA) provides stronger, more resilient, and longer-lasting pavements than traditional bituminous mixtures, with 38.9%
increase in Marshall stability, 31% decrease in abrasion value, and 25% decrease in crushing value. This unique mix helps create adaptable, affordable, and
environmentally friendly pavements while promoting sustainable waste management.