| Abstract Scope |
The fiber-matrix interface plays a decisive role in the mechanical performance and durability of natural fiber-reinforced cementitious composites. Although lignocellulosic fibers can bridge cracks and improve post-cracking behavior, their effectiveness depends on adhesion, interfacial transition zone characteristics, fiber pull-out resistance, and stress transfer mechanisms. This study reviews literature on the interaction between natural fibers and cement-based matrices, focusing on bonding mechanisms, microstructural features, crack-bridging behavior, and interfacial degradation. The reviewed studies indicate that weak adhesion may reduce reinforcement efficiency, whereas excessive bonding can limit fiber pull-out and energy absorption. Moisture movement, alkaline attack, and mineral precipitation within fiber lumens also affect the interface over time. Strategies such as fiber treatment, matrix modification, supplementary cementitious materials, and optimized fiber geometry have been proposed to improve interfacial performance. Understanding the fiber-matrix interface is essential for designing durable, mechanically efficient, and sustainable cementitious composites reinforced with natural fibers. |