ABSTRACT
The incorporation of construction and demolition (C&D) waste as a base or subbase material in road construction offers a sustainable solution for managing construction waste and reducing dependence on natural aggregates. This study involves large-scale model pavement experiments (LSMPE) comparing the performance of reinforced C&D waste and natural aggregates under repeated loading. Tests were conducted in a 1.5 m × 1.5 m × 1 m chamber using a geocell (GC) with 100 mm cell depth, over a subgrade with a California Bearing Ratio (CBR) of 5%. Repetitive wheel loads (550 kPa) were applied through a 300-mm-diameter rigid circular plate. Performance was assessed using the Traffic Benefit Ratio (TBR) over 50,000 load cycles, focusing on comparative resistance to cumulative permanent deformation (CPD). The study highlights the effectiveness of C&D waste as a sustainable alternative to natural aggregates for flexible pavement base and subbase layers.
