Impact of adding PET fibers to concrete

Moreno Alcívar L.; Castro Valle R.; Herrera Franco G.; Muñoz Rosado M.; Altamirano Espinoza E. · Proceedings of the LACCEI international Multi-conference for Engineering, Education and Technology (2025) · DOI: 10.18687/laccei2025.1.1.1885

Resumen

The indiscriminate use of plastics has led to an environmental crisis due to inadequate disposal and prolonged degradation time. Among them, polyethylene terephthalate (PET) is widely used in food packaging and textiles, significantly contributing to plastic waste generation. This study investigates the incorporation of PET fibers into concrete as a sustainable solution within the framework of the circular economy. Experimental tests were conducted to evaluate the mechanical properties of concrete with PET fiber additions at different dosages (2%, 3%, 4%, and 5% relative to cement weight) and in two forms (smooth fibers and accordion-shaped fibers). The results showed that adding 2% smooth PET fibers increased compressive strength by 3% and flexural strength by 12.6%, while higher percentages negatively affected material resistance. The findings highlight the potential of PET-reinforced concrete as a viable alternative to reduce plastic waste and enhance material performance in construction.

Instituciones: Universidad Nacional de Tumbes