Durability is an essential component that plays a crucial role in the rigid pavement performance and service life. However, with the rapid growth of traffic loads and climate change, rigid pavement suffers from various distresses, including thermal cracks, freeze-thaw cycles that lead to moisture damage, and chemical attacks. Thus, the researchers applied a novel technique to improve the overall performance of rigid pavement by using different types of additives. Among many kinds of additives, the current study seeks to review the use of Nano-silica and glass fiber in concrete admixtures. Nano-silica is a nanoparticle that acts as a pozzolanic fabric that improves the bonding between debris, while glass fibers are synthetic fibers that offer additional tensile strength and reduce cracking. Flexural strength, compressive strength, and skid resistance tests were conducted in the previous studies to evaluate the performance of modified rigid pavement. Results demonstrated that the rigid pavement modified with Nano-silica improved the compressive strength and moisture resistance compared with the control rigid pavement. Nonetheless, the Nano-silica had a slight improvement in tensile strength. Moreover, the best dosage of Nano-silica in the concrete mixture was from 1% to 3% by weight of cement. Glass fiber has a significant influence on the tensile strength of rigid pavement. The recommended percentage for adding glass fiber is 0.4–1% by weight of aggregate. Finally, adding single additives to rigid pavement is not enough to improve the overall performance. Therefore, it is recommended to use the admixture of Nano-silica and glass fiber in rigid pavement. |
