A Review on Corrosion of Reinforcing steel in Concrete Structures Located on the Southern Coast of Iran

Coastal Structures in the Middle East are influenced by hydrostatic pressure, impact loading, erosion and continuous cycles of changes in temperatures. As a result, these structures are often made of high strength concrete and reinforcement steel. Therefore, protecting steel embedded in concrete is critical from the point of view of durability. Concrete permeability is the most important determinant of long-term durability. Although concrete is considered as a durable material in the marine environment, many collapses have been reported from concrete structures by the beach. The durability of the material can be resulted from the proper implementation and maintenance. The situation of the Persian Gulf in terms of salts in seawater and in terms of its climatic conditions have made this environment as one of the most aggressive marine environments from the perspective of corrosion of reinforcement in concrete structures. Early collapses due to corrosion of reinforcement in concrete structures in the Persian Gulf region have caused a lot of maintenance costs for countries in this region. Therefore, the increasing tendency to determine the causes of the corruption in concrete, the methods to prevent it, and contributing factors in high resistance and strength, unlike the short life of the concrete, is a sign for the importance of the issue. In this study, a number of samples with water-cement ratio of 54.0 to 540 are provided to investigate the damage to reinforced concrete structures due to corrosion of rebar. They are tested after being submerged in different atmospheric, splash and tidal zones Then, chloride penetration, electrical resistance, potentials and corrosion current strength were measured., water-cement ratio, use of silica fume, and the selection of appropriate thickness for the coating rebar is important to protect concrete structures in the region

کلیدواژه ها:

corrosion reinforced concrete ، Persian Gulf ، permeability ، corrosion current strength ، corrosion potentials