Enhancing Recycled Aggregate Concrete with Polypropylene Fiber Reinforcement

The use of recycled aggregates (RA) in concrete is gaining attention as a sustainable approach toreducing the environmental impact of construction materials. However, the incorporation of RA oftenleads to reduced strength and durability of concrete. This research explores the potential of polypropylenefibers (PPF) as a reinforcement material to enhance the properties of recycled aggregate concrete (RAC).The study aims to investigate the effect of varying percentages of polypropylene fibers on the mechanicaland durability properties of RAC, including compressive strength, split tensile strength, flexural strength,and resistance to water absorption and chemical attacks.Concrete mixes with different replacement levels of natural aggregates with recycled aggregates (0%, 25%,50%, and 75%) will be prepared, and polypropylene fibers will be incorporated at varying dosages (0.5%,1%, and 1.5% by volume). The workability, strength, and durability of the mixtures will be tested atdifferent curing ages (7, 28, and 56 days). The research will also include a comparative analysis of theperformance of RAC with and without polypropylene fibers.The outcome of this study will provide insights into the optimal fiber content and the most effectiverecycled aggregate replacement percentage, contributing to the development of more sustainable anddurable concrete solutions. The findings are expected to highlight the feasibility of using polypropylenefibers to offset the performance issues typically associated with recycled aggregates in concrete.