Amid growing environmental concerns and the urgent need for sustainable construction practices, recycled concrete aggregates (RCA) have garnered significant attention. This research explores the enhancement of recycled aggregate concrete (RAC) performance while increasing the substitution level of RCA. The study investigates the mechanical and durability properties of M30-grade RAC, incorporating various combinations of OPC, PPC, Alccofine, manufactured sand, natural aggregates, and recycled coarse aggregates across 27 mixes. The results reveal that the mix containing 80% RCA with PPC, 10% Alccofine, and 0.50% glass fiber achieved a compressive strength of 39.74 MPa, surpassing the target strength. The flexural strength for this mix was 3.89 MPa, exceeding the requirements for low-volume road applications. The performance of RAC improved significantly in binary, ternary, and fiber-reinforced ternary blends, with fiber-reinforced ternary blends demonstrating superior performance and sustainability benefits. The durability of RAC was found to be improved with the inclusion of Alccofine and glass fibers. Alccofine showed superior improvement in durability properties such as chloride penetration, Sorptivity, and drying shrinkage. Compressive strength results were validated using response surface methodology (RSM). These findings highlight the viability of fiber-reinforced ternary blends for applications like pavements, which demand large quantities of aggregates. The study underscores the potential of recycling construction waste, reducing the carbon footprint, and advancing sustainable construction practices, paving the way for a greener future in the industry.
