Recent developments of recycled concrete, with the substantial replacement of natural aggregate with recycled aggregate arising from concrete, propose a viable pathway for multiple projects while enhancing ecological standards and offering a remedy for the globally produced construction waste. The usage of Recycled Concrete Aggregate (RCA) in Self-Compacting Concrete (SCC) has the benefit of decreasing both the impact on the environment and economic costs. The research aims to evaluate the impact of recycled concrete aggregates as a fractional replacement of Natural Aggregate (NA) on the long-term properties of self-compacting concrete containing 0 to 100 percent having each sample with an increase of 25 percent coarse RCA. In order to improve the mechanical properties of SCC so that it can be applied in beam-column joints, the present study was carried out using reinforced concrete. Porosity metrics are analyzed in regards to the mechanical properties test outcomes where the distribution of the pore radius and the concrete thickness were investigated at the ages of 7, 14 as well as 28 days. Utilizing waste and recycled materials onto concrete not only has a lasting benefit yet additionally provides greater resilience towards exceptional situations faced by concrete structures, including fire, that induces significant concrete damage.In order to compare the reactions of concrete to higher temperatures at different ages, a specific metric has been adopted that reflects the cumulative region under the proportional residual strength curve for compressive and flexural after exposure to varying temperatures ranging to 800oC.The silica-fume obtained as industrial by-product activated by chemicals concentrated on sodium or potassium assists in the forming of the structure like porous foams and might be appropriate as compact and minimal-cost materials for potential insulating purposes. In aspects of porosity, thermal and acoustic insulation properties, the structures were characterized.