Kerzazi, MohamedGuennaoui, Mohamed AbdellahDERBAL, Ahlem2025-07-142025-07-142025http://dspace.univ-temouchent.edu.dz/handle/123456789/6664This work focuses on the study of hybrid fiber-reinforced concrete, a major innovation in construction materials. Through theoretical, experimental, the impact of combining metallic and synthetic fibers on the mechanical properties, durability, and microstructure of concrete was evaluated. The results demonstrate that fiber hybridization significantly enhances tensile strength, ductility, crack control, and material durability. This research opens new perspectives for optimizing concrete formulations for demanding structural applications. Comprehensive literature review on different fiber types (metallic,polypropylene, natural), their mechanical properties, and reinforcementmechanisms was adding, characterization of materials used (cement, aggregates,fibers) and determination of optimal fiber dosages, preparation of hybrid fiber concrete mixes with various fiber combinations and dosages. xperimental testing including mechanical tests (compression, tensile, flexural), durability assessments, and microstructural analysis. Analysis and interpretation of results to understand fiber-matrix interactions and optimize concrete formulations.frFibres hybrides ; fibres métalliques ; fibres polypropylène, fibre de verre, laitier.Hybrid fibers; metallic fibers; polypropylene fibers, glass fiber, slag.Thesis