Abstract
The purpose of this study is to assess the mechanical performance of structurally appropriate concrete made from natural aggregates and partially recycled aggregates. Prism, cubic, and cylinder specimens were tested for the static modulus of elasticity, density, and compressive strength as part of the experimental program. Reinforced concrete slabs containing both aggregate types and either steel or GFRP bars were subjected to full-scale bending testing. The results showed that the basic mechanical parameters of concrete were unaffected by the addition of recycled particles. Mixed with recycled materials, the compressive strength, a stiffness, and density of the resulting material were all on a par with those of conventional aggregate concrete. When combined with steel reinforcement, the recycled concrete showed deformation behavior comparable to that of natural aggregate concrete in slab tests, effectively controlled cracks, and demonstrated sufficient load-bearing capacity. In conclusion, the results show that, with proper design, recycled aggregate concrete (RAC) can be a sustainable and structurally sound alternative to conventional concrete mixes. This lends credibility to its use in contemporary building projects and shows that it can help save the environment.