Bond behavior of GFRP bars in concrete with carbon nanotubes

This work investigates the adherence of 12.7 mm glass fiber-reinforced polymer (GFRP) bars in concrete with carbon nanotubes (CNT) through pull-out tests. Eighteen specimens were used to investigate the impact of CNT content (0% and 0.05% by weight of cement) and anchorage length (5d and 10d). Reference samples were produced using 12.5 mm steel bars. An additional fifty-four specimens were cast to evaluate the influence of CNTs on the mechanical and durability properties of the concrete. This research provides satisfactory results regarding utilizing GFRP bars instead of steel ones and incorporating CNT in concrete.