A systematic review on the impact of polypropylene fibers on the physico-mechanical, microstructural and durability properties of concrete

The construction industry faces a serious environmental impact due to high cement emissions, which drives the search for sustainable alternatives such as polypropylene fiber reinforced concrete (PPF). To this end, its effect on concrete properties was analyzed through a systematic and filtered review of 66 recent articles between 2021 and 2025 extracted from Scopus, ScienceDirect and MDPI. The studies show that PPF improves compressive, flexural and tensile strength, especially in proportions close to 0.5%. It also increases durability against aggressive agents and improves microstructure by controlling cracks, although it can reduce workability and increase porosity, effects that can be mitigated by the use of metallic fibers or pozzolanic additions. In conclusion, the use of PPF is a viable option to reduce the environmental impact of concrete and improve its performance when applied in adequate proportions.