V.Sandeep, P.Keerthi, Nazmina Yasmin, M.Nikitha, P.Arpitha, V.Ankitha 02 08 The construction industry is one of the largest consumers of natural resources especially natural aggregates for the production of concrete and bituminous mixes At the same time it is also one of the largest producers of waste generating millions of tons of construction and demolition CD debris each year Traditionally these wastes have been disposed of in landfills or used in lowgrade applications thereby exerting additional pressure on natural aggregate sources and contributing to environmental degradation To address these challenges the recycling of construction and demolished concrete into aggregates for use in pavement construction offers an effective and sustainable solution This research focuses on the preparation of bituminous concrete mixes using aggregates derived from demolished concrete The study involves partial and complete replacement of natural aggregates with recycled concrete aggregates RCA obtained from CD waste Laboratory investigations such as Marshall Stability flow value bulk density air voids voids in mineral aggregates VMA and voids filled with bitumen VFB are carried out to evaluate the performance of these mixes The results are compared with conventional mixes to determine the suitability of RCA in flexible pavements The findings demonstrate that recycled aggregates despite having slightly higher porosity and absorption than natural aggregates can be successfully incorporated into bituminous mixes Their angular texture improves aggregatebinder bonding and interlocking while adjustments in bitumen content compensate for higher absorption The use of recycled aggregates not only ensures sustainable utilization of CD waste but also conserves natural resources reduces construction costs minimizes environmental impact and aligns with the principles of circular economy and green highway initiatives Copyright (c) Journal of Science Engineering Technology and Management Science. All rights reserved 2026