UTILIZATION OF RECYCLED POLYETHYLENE TEREPHTHALATE (RECYCLED PET) FIBERS FOR INNOVATIVE CONCRETE PROPERTY ENHANCEMENT

The construction industry's expansion, driven by larger and more intricate projects, has increased the demand for concrete across various sectors such as residential and infrastructure development, mirroring the ongoing trend of urbanization. To align with environmental concerns, the industry is now prioritizing eco-friendly construction methods. This study focuses on incorporating recycled Polyethylene Terephthalate (recycled PET) bottle fibers into conventional concrete. The goal is to vary the fiber percentage to achieve optimal compressive strength and desired workability, addressing the challenge of finding the right balance between these key factors. The PET fibers were irregularly cut and mixed with standard concrete materials, including cement, aggregates (fine and coarse), and water, with the addition of Plastocrete Plus as an admixture. The fiber size used was 25 mm long, with a width ranging between 1-2 mm, cut non-uniformly. The percentage of PET fibers was adjusted based on the weight of the cement to achieve enhanced strength and workability. The PET fibers at 0%, 2%, 4%, 6%, and 8% were tested for workability and compressive strength. Numerous specimens, including 15 cube specimens, were tested, and the optimal dosage of recycled PET fibers was determined. The results indicate that, after 21 days of curing, the 4% fiber content exhibited a significant increase in compressive strength, approximately 13.3%. The study validates the obtained optimum dosage by comparing it with relevant literature. Considering both the literature and the findings of this study, it is concluded that the practical application of PET bottle fibers in the construction industry is feasible.