Torsional strength enhancement of reinforced concrete beams with near surface mounted Carbon Fibre Reinforced Polymer Composites

Carbon Fibre-Reinforced Polymers (CFRP) have been used to increase the strength of reinforced concrete members, currently no studies have been conducted on torsional strengthening using Near Surface Mounted method as current research on torsional strengthening has been conducted using Externally Bonded Reinforcement technique only. Experimental, numerical and theoretical results of twenty-eight reinforced concrete beams have been presented. The beams have been tested in torsion using a specialized torsional rig system. The influence of groove spacing, the effect of different strengthening techniques, and the use of CFRP laminates and CFRP ropes were the critical parameters and the variables investigated was considered using epoxy and cement-based adhesive as an alternative adhesive to epoxy.