Utilizing recycled PET fiber-reinforced concrete for sustainable and seismic-resilient infrastructure: a case study of Taiwan’s advancing green construction practices

Abstract
The escalating concern over plastic waste and the urgent need for sustainable construction materials have catalyzed innovative approaches, such as the integration of recycled polyethylene terephthalate (PET) fibers into concrete. This study rigorously investigates the mechanical and durability performance of PET fiber-reinforced concrete (PFRC) through comprehensive laboratory experiments and advanced simulation techniques. Concrete mixtures featuring 0%, 0.5%, 1.0%, and 1.5% PET fibers were meticulously tested for key properties, including compressive, tensile, and flexural strength, as well as water absorption, chloride penetration, and freeze-thaw resistance. The results unequivocally indicate that both tensile and flexural strength significantly enhance with increasing fiber content, achieving optimal performance at a 1.0% PET fiber addition. Moreover, a compelling case study on the use of PFRC in seismic infrastructure in Taiwan revealed substantial improvements in energy dissipation and crack control, validated by finite element analysis and thorough life-cycle cost evaluation. These groundbreaking findings underscore the immense potential of PFRC to not only fulfill critical structural performance needs but also to advance environmental sustainability, particularly in earthquake-prone regions. Such advancements represent a pivotal step toward a more sustainable and resilient future in construction.