Performance Assessment of Bituminous Concrete Mix Incorporating Reclaimed Asphalt Pavement and Plastic Waste

Abstract

This study explores the use of sustainable materials in bituminous concrete mixes for eco-friendly pavement construction. The investigation focuses on
incorporating Reclaimed Asphalt Pavement (RAP) aggregates, plastic waste, and molasses as partial replacements for conventional materials in mixes prepared
with VG-30 grade bitumen. Initially, a conventional bituminous concrete mix using virgin aggregates is prepared as a control mix. Subsequently, RAP aggregates
are introduced to evaluate the feasibility of recycling pavement materials. In further trials, plastic waste is used as a partial replacement for bitumen to address
environmental pollution and improve mix characteristics. Molasses is also incorporated as a partial bitumen replacement to study its influence on stability and
durability. The performance of all mixes is assessed through Stability, Indirect Tensile Strength (ITS) and Tensile Strength Ratio (TSR) tests. The study aims to
achieve improved mechanical performance while reducing environmental impact. Results indicate that the combined use of RAP aggregates, plastic waste, and
molasses can produce durable and sustainable bituminous concrete mixes suitable for future green pavement applications.