Published Paper Details:

Ultra-high-performance concrete (UHPC) is a revolutionary construction material characterized by compressive strengths exceeding 150 MPa and exceptional durability. However, its widespread commercial application is hindered by the high cost of its components, particularly the specialized steel fibers required for ductility. This research explores a sustainable and cost-effective alternative: the use of macro fibers recycled from waste glass fiber-reinforced polymer (GFRP) composites, derived from decommissioned wind turbine blades. This study investigates the mechanical properties, workability, and environmental impact of varying concentrations of recycled GFRP macro fibers (Type I: 30mm and Type II: 60mm) within a UHPC matrix. Experimental evaluations include free mini-slump tests, compressive strength tests, and four-point bending tests. Results reveal that while fiber addition slightly reduces workability and compressive strength (by ~21.8%), it yields a 1.5-fold increase in flexural strength and a remarkable 46.9-fold increase in toughness compared to plain UHPC. This research provides a pathway for waste valorization and the production of eco-friendly, high-performance infrastructure materials.