RCA and LDPE partial replacement in bituminous mixtures

As road construction materials become more innovative, construction companies are looking closer at waste materials, such as Recycled Concrete Aggregate (RCA) and Low-Density Polyethylene (LDPE) in bituminous mixtures, as possible sources. This research focuses on bitumen modified with LDPE weight percentages and aggregates partially replaced with RCA. Laboratory analysis and tests were conducted on the penetrative and ductile Marshal mixtures, as well as the impact values of mobile and durable characteristic aggregates. It was demonstrated that an increased binder content increases the likelihood of performance at 2-4% LDPE, and that the binder tends towards optimum softness and ductility as it incorporates more LDPE. The Marshall weight showed that more than 4% LDPE decreased the weight supported, while less than 4% increased it. It was found that 30% RCA replacement had the highest Aggregate Impact Value. The 4% LDPE and 30% RCA turned out to be the best combination in terms of strength with durability. This combination, while still having a balance with waste management and LDPE durable waste, is environmentally sustainable. This technique would be beneficial for eco-friendly pavement construction. Development can be sustainable as well.