The document experimentally investigates the durability properties of recycled aggregate concrete. Concrete mixtures were prepared with 0-50% replacement of natural coarse aggregates with recycled concrete aggregates. The compressive strength, split tensile strength, density, water absorption, acid resistance, and alkali resistance of the mixtures were tested. The results show that concrete with up to 30% recycled aggregate replacement exhibited comparable or slightly lower compressive and tensile strengths compared to a 100% natural aggregate control mixture. Water absorption generally increased and density decreased with higher recycled aggregate content.