ЭКСПЕРИМЕНТАЛЬНОЕ ИССЛЕДОВАНИЕ ИСПОЛЬЗОВАНИЯ ПЕРЕРАБОТАННОГО ПОЛИЭТИЛЕНТЕРЕФТАЛАТА И СТАЛЬНЫХ ВОЛОКОН ДЛЯ УЛУЧШЕНИЯ ПОВЕДЕНИЯ ЖБ КОЛОНН

This study investigates the enhancement of reinforced concrete (RC) columns using recycled polyethylene terephthalate (PET) and steel fibers. The inclusion of fibers in concrete significantly improves its characteristics, enhancing strength, ductility, and fatigue resistance. Steel fibers (SFs) are commonly used, with research indicating that their orientation, aspect ratio, volume fraction, distribution, and geometry affect concrete performance. Various studies have demonstrated that SFs enhance flexural and tensile strengths, with volume fractions of 1.5% yielding notable increases. Synthetic fibers like PET, derived from waste bottles, offer advantages such as corrosion resistance, easy mixing, and lightweight properties. Utilizing PET fibers in concrete contributes to sustainability by repurposing plastic waste, reducing environmental pollution, and improving concrete properties. Research shows that concrete with PET fibers maintains or enhances compressive, tensile, and flexural strengths, and increases ductility. However, the replacement of aggregate with PET fibers can reduce compressive strength while improving workability. This review compiles findings from 84 studies, highlighting the potential of PET fibers to enhance the structural performance and sustainability of concrete, particularly in the production of polymer concrete for precast components.