Experimental Study on the Use of Recycled Denim Fibers as Reinforcement in Concrete Composites

This research presents a comprehensive experimental investigation into the incorporation of recycled denim fibers into concrete as a sustainable reinforcement alternative. With the fashion industry generating substantial volumes of denim waste annually, particularly from post-consumer garments, the need for eco-conscious reuse strategies has become critical. Recycled denim fibers, rich in cellulose and blended synthetics, offer tensile properties that may enhance concrete’s mechanical behavior. Concrete mixes were prepared with incremental fiber dosages (0%, 0.5%, 1.0%, and 1.5% by weight of cement) and tested for workability, compressive strength, flexural strength, and durability through a battery of standardized tests. The findings indicate that denim fiber reinforcement improves the flexural strength and crack resistance of concrete, especially at 1.0% fiber content, with acceptable compromises in workability. This approach supports circular economy goals and presents a novel route for textile waste valorization in construction.