Fiber reinforced polymer (FRP) reinforcing bars are generally thought to be an acceptable replacement to standard steel reinforcing bars in concrete construction where corrosion is a major concern for the structure's long-term serviceability. Due to this property, engineers have been motivated to use FRP bars in concrete structural elements for a wide range of applications. High strength-to-weight ratios, electromagnetic transparency, and corrosion resistance are only a few of the advantages. In this study, the bond durability of all GFRP bar test specimens in concrete is compared to steel reinforcement of the same bar diameter and implanted length under accelerated hostile environmental conditions (sulfate
Al-Azhar University Civil Engineering Research Magazine ( CERM )
Vol. (44 ) No. ( 1 ) January 2022
119
and chloride solution). The GFRP bars are handmade using local resources and raw materials. The main parameters were the bars' surface enhancement (smooth surface, sand coating, and mechanical) exposed under two aggressive environmental conditions (sulfate and chloride solution) at room temperature for 60 days. The results reveal that the different surface treatments for the same nominal size GFRP rebars have a respectable effect on the bond durability of concrete exposed to aggressive environments, which enhances bond stress and modes of failure compared to specimens notched by steel reinforcement.