UTILIZATION OF ALTERNATE PAVEMENT MATERIAL IN PAVEMENT CONSTRUCTION: A SYSTEMATIC REVIEW

This paper provides a detailed review of different alternate materials being used optimally in asphalt mixes. It demonstrates that various waste materials, including Reclaimed Asphalt Pavement, fly ash, various shells, geopolymer, rubber, scrap tires, plastic waste, bamboo, jute, crushed glass, etc., can be alternatively employed in the production of asphalt mix. In nations such as India, waste generated from different sources is typically subjected to incineration, open burning, disposal into landfills or water bodies, and discharge into sewers. This underscores the potential for utilizing waste as an alternate construction material in pavement development, particularly in developing nations like India, where consumption is high and disposal space is limited. Additionally, the imperative for efficient energy usage and the global concern for climate change make it essential to reduce pollution and enhance recycling and reuse. Therefore, the integration of such practices into civil engineering scenarios is crucial to meet environmental standards. This study assesses the diverse applications of alternate waste in sustainable pavement construction and reviews existing research on the reuse of some waste alternate materials as road construction materials and their sustainability. Further, associated challenges in implementing alternate materials in road construction have been discussed.