Korathala Shiva Kumar Reddy, J. Abdullah Khan 02 10 The rapid expansion of infrastructure development has increased the demand for natural aggregates while simultaneously generating large quantities of construction and demolition waste Conventional concrete production therefore creates a dual sustainability challenge involving depletion of virgin aggregate resources and disposal of concrete waste Recycled aggregate concrete provides a potential circulareconomy solution by replacing a portion of natural coarse aggregate with recycled concrete aggregate obtained from processed construction and demolition waste This study presents an experimental framework for assessing the mechanical and durability performance of recycled aggregate concrete intended for sustainable structural applications Natural coarse aggregate is progressively replaced with recycled coarse aggregate at selected replacement levels while the remaining mixture parameters are maintained as consistently as possible The experimental program evaluates compressive strength split tensile strength water absorption and overall performance relative to conventional concrete The findings support the use of suitably processed recycled aggregate in selected structural concrete applications when aggregate quality replacement ratio moisture condition grading contamination and mix design are carefully controlled The study further demonstrates that sustainability assessment should not be based solely on the percentage of recycled material incorporated instead structural performance durability service life material transportation processing requirements and endoflife recovery should be considered together The results are consistent with recent research showing that recycled aggregate concrete can achieve satisfactory mechanical performance at controlled replacement ratios and that the optimum replacement level depends strongly on aggregate quality and mixture design The research therefore provides a practical experimental framework for evaluating recycled aggregate concrete and contributes to the development of more resourceefficient structural materials capable of supporting circular construction practices without compromising essential engineering performance Copyright (c) Journal of Science Engineering Technology and Management Science. All rights reserved 2026