Fast repair of damaged RC beams using UV curing FRP composites

摘要

In this paper, twenty-one 50.8 cm long, 7.52 cm wide, and 15.24 cm deep steel reinforced concrete (RC) short beams were prepared using 40 MPa concrete and Grade 60 rebar in various sizes. Among them, four beams were reinforced with #5 rebar, seven beams were reinforced with #4 rebar, and ten beams were reinforced with #3 rebar. After 28 days of curing, the prepared beams were precracked by four-point bending to simulate heavily damaged RC beams. The damaged beams were then surface prepared using sand-blasting and repaired using E-glass fiber-reinforced ultraviolet (UV) curing vinyl ester. The repairs were fully cured by exposure to an UV-A light source for one hour. The repaired beams were again subjected to four-point bending test, this time until failure. The effectiveness of UV curing FRP on fast repairing damaged RC beams was evaluated based on the test results.