Applications of Aramid Fiber-Reinforced Polymer Composites in Civil Engineering: A Review

Aramid fiber is a high-performance fiber with excellent mechanical properties, heat resistance, and corrosion resistance. Its exceptional shear and fatigue properties make it a promising material for civil engineering applications. This study summarizes the basic properties and current development of aramid fiber, as well as the applications of aramid fiber and its composites in civil engineering, including aramid fiber-reinforced composite (AFRP)-concrete/steel composite structures, AFRP rebars, and AFRP rock anchors. The results indicate that the poor interfacial bonding performance between aramid fibers and the resin matrix is the primary bottleneck restricting the application of AFRP composites in civil engineering. Consequently, developing a continuous surface treatment method suitable for industrial-scale production remains a key challenge for the widespread adoption of these composites. Furthermore, in certain specific working conditions and environments-such as seismic retrofitting of rectangular concrete columns, impact/explosion resistance reinforcement, and rock anchoring-AFRPs show the potential to replace traditional inorganic fiber-reinforced polymer composites. However, systematic investigation into the fundamental mechanical properties and long-term service performance of AFRP is still required prior to their practical application.