Reinforced concrete beam behavior with strengthening of CFRP lamination in the seawater environment

Abstract

The strength of concrete structures in the seawater environment decreases with the duration of exposure seawater due to high content of chloride compounds. Repairing structures are difficult in marine environments requires creating new methods that are effective, easy to work and economical. One of them is by using CFRP (Carbon Fiber Reinforced Polymer) material which is proven to corrosion resistant. Strengthening is done with external bond CFRP on the area that you want to strengthen. This research was conducted with an experimental method, namely reinforced load concrete beams were given a monothonic load with two points to determine the ultimate load capacity of the beams and then compared with the increase in the CFRP variable layer which the ends were anchored with CFRP U-wrap and given sea water immersion behavior. The results of the flexural test showed that along with the time of sea water immersion there was a decreases in the capacity of the ultimate load from the normal beam and with CFRP reinforcement are on normal test specimens without reinforcement of 3.12%, concrete with CFRP layers 1,2 and 3 in sequence are 2.92%, 2.84, and 2.75%. The largest ultimate load capacity with 3 layers of CFRP is 36.23%.