This study investigates the treatment of recycled aggregates (RA) using a fly ash solution with varying concentrations and analyzes its impact on mechanical and durable parameters. Recycled aggregates often exhibit undesirable characteristics, such as porosity, high water absorption, and low crush resistance, necessitating innovative approaches for enhancement. In this research, recycled aggregates were subjected to treatment with fly ash solutions of different concentrations to explore the influence on their properties. The study comprehensively examines the mechanical parameters, including compressive strength and other relevant mechanical attributes, before and after the treatment with varying concentrations of the fly ash solution. Additionally, the durable parameters of the treated recycled aggregates are rigorously analyzed to assess their long-term performance and resilience. By varying the concentration of the fly ash solution, the research aims to identify the optimal treatment condition that maximizes improvements in mechanical strength and durability. The findings of this study contribute valuable insights into tailoring the treatment process for recycled aggregates, addressing specific challenges associated with varying concentrations of fly ash solutions. This approach not only seeks to enhance the performance of recycled aggregates but also aligns with sustainable practices by repurposing industrial by-products. The research outcomes aim to advance the understanding of effective and environmentally friendly methods for optimizing the use of recycled aggregates in construction applications.