This study investigates the mechanical performance enhancement of concrete through the incorporation of 0.3% Forta-Ferro synthetic fibers. To evaluate this, standard compressive, flexural (four-point bending), split tensile, and Semi-Circular Bending tests were conducted on 160 laboratory-cast specimens, with and without fiber reinforcement. Results revealed a 12% increase in compressive strength (from 24.9 MPa to 27.9 MPa), a 22% rise in flexural strength (from 2.92 MPa to 3.58 MPa), and a 35% improvement in SCB flexural strength (from 2.51 MPa to 3.40 MPa) due to fiber inclusion. Additionally, flexural toughness increased by over 16 times, and Semi-Circular Bending toughness exhibited a 4.9-fold gain, demonstrating substantial improvements in post-cracking energy absorption. Pearson correlation analysis showed strong relationships between Semi-circular Bending tests and standard mechanical properties (r > 0.87), validating Semi-Circular Bending testing as a cost-effective alternative for flexural performance evaluation in Fiber-Reinforced Concrete.
Visual inspection confirmed fiber bridging mechanisms that contribute to enhanced ductility and toughness. This research uniquely establishes the practicality of Semi-Circular Bending testing for Fiber-Reinforced Concrete and highlights Forta-Ferro fibers potential for improving concrete durability in infrastructures such as pavements, bridge decks, and industrial floors. Future work is recommended to explore optimal fiber dosages and microstructural characterization to further advance Fiber-Reinforced Concrete applications. Future work is recommended to explore different fiber dosages (e.g., 0.1–0.5%) and investigate their nonlinear impact on strength and toughness, as well as durability under environmental conditions.