The Effect of Micro-Steel Fiber on the Corrosion Steel Reinforcement

There are many possible sources of ion chloride which can be open to concrete during service. Structure thesaurus to the sea may be sprayed with salt mist or seawater carried by the wind. In order to understand the behaviour of structures, different levels of corrosion must be studied. The current study has been taken up to investigate the behaviour of Reinforcement Concrete beams (RC) and bond strength of specimens exposed to 5% chloride solution, to cause corrosion of reinforcement. Two types of mixing by using Ordinary Portland Cement (OPC) type (I) concrete (with and without using micro steel fiber Vf =1.2) to cast eight reinforce concrete supported simply beam. Corrosion was accelerated using electrical current with different density to cause mass loss in steel bar with different levels of 6 %, 10 %, and 16 %. The results of the bond test and beams show a decrease in capacity with increasing the corrosion. The micro steel fiber causes an increase in bond strength of concrete ranged from (40-60%), and an increase in ultimate strength of beams ranged from (4 to 38 %) as compared with the beam without steel fiber.