Quantitative Assessment of Strengthening Strategies and Design Recommendations for the Repair of Corrosion-Damaged Reinforced Concrete Members

Abstract

Maintenance of reinforced concrete (RC) structures has become a global issue due to the problems associated with the corrosion of steel reinforcement. Corrosion of RC structures results in severe serviceability and strength issues, which in turn necessitates major repair works. Though it is difficult to eliminate the risk of corrosion in RC structures, appropriate retrofitting procedures can be implemented to restore the lost strength. This paper presents a detailed analysis of the mechanism of corrosion in RC members and the procedure for retrofitting corrosion-damaged RC members subjected to different loading conditions. Moreover, the efficiency of existing strengthening techniques, such as steel jacketing, fiber-reinforced polymer (FRP) composites, engineered cementitious composites (ECCs), ferrocement jacketing, fabric-reinforced cementitious composites (FRCMs) and ultra-high-toughness cementitious composites (UHTCCs), are evaluated and compared in relation to restoring/enhancing the performance of corrosion-damaged RC members under different loading scenarios. Moreover, the paper provides a detailed comparison of the effects of different parameters governing the corrosion mechanism and suggests suitable design recommendations for improving the overall performance of corrosion-damaged RC members.

Performance of fire damaged cement and geopolymer concrete slabs retrofitted with BFRP laminates under static loading

“…Accelerated corrosion with NaCl solutions is preferred, while FRP and ECC methods emerge as effective for restoring capacity in corrosion-damaged RC members. Further research is needed to assess the long-term durability of these strengthening techniques for sustainable infrastructure solutions [17]. The-art review on repairing and strengthening severely damaged RC members under static and seismic loads, analyzing repair methods for various damage mechanisms such as core concrete damage, cover concrete spalling, tie rupture, and longitudinal reinforcement yielding and buckling [18].…”

Structural Health Monitoring of Fiber-Reinforced Concrete Prisms with Polyolefin Macro-Fibers Using a Piezoelectric Materials Network under Various Load-Induced Stress

“…Also, using synthetic fibers increases the blast capacity of beams built without transverse reinforcement, delaying shear failure. Furthermore, to enhance the strength of vertical structural components, such as columns, innovative materials like fiber-reinforced concrete (FRC) are employed [12,13]. Multiple crucial factors influence the performance of FRC, such as the type of fiber employed, the fiber content, the concrete mix design, the curing conditions, and the concrete age [14,15].…”