Feasibility of fiber-reinforced mortar in retrofitting minor structural deficiencies

Fiber-reinforced mortar has emerged as a promising material for retrofitting existing structures exhibiting minor structural deficiencies such as surface cracking, inadequate cover thickness, localized spalling, and reduced serviceability. Conventional repair techniques often rely on cementitious overlays or polymer-based systems, which may suffer from compatibility issues, limited durability, or higher costs. In contrast, fiber-reinforced mortar integrates discrete fibers within a cementitious matrix, enhancing tensile strength, crack resistance, and energy absorption capacity while maintaining material compatibility with existing concrete substrates. This research evaluates the feasibility of fiber-reinforced mortar as a retrofitting solution for minor structural deficiencies by examining its mechanical performance, durability characteristics, constructability, and economic implications. Experimental and analytical evidence from previous investigations indicates that the inclusion of fibers such as steel, polypropylene, glass, or basalt significantly improves flexural strength, post-cracking behavior, and resistance to shrinkage-induced cracking. These properties are particularly advantageous for retrofitting applications where structural intervention must be minimal and non-intrusive. The abstract also discusses the influence of fiber type, dosage, and aspect ratio on bond performance and long-term behavior under service loads. Practical considerations such as ease of application, curing requirements, and compatibility with conventional repair practices are addressed to assess on-site feasibility. The findings suggest that fiber-reinforced mortar offers a technically viable and cost-effective alternative for extending the service life of aging structures with minor deficiencies, especially in low- to medium-demand retrofitting scenarios. However, performance variability associated with improper mix design or poor workmanship underscores the need for standardized guidelines. Overall, fiber-reinforced mortar demonstrates strong potential as a sustainable retrofitting material, balancing mechanical enhancement, durability, and constructability without imposing significant additional loads on existing structural systems.