Effect of distance from the sea on reinforced concrete chloride corrosion probability

Document Type : Research Article

Authors

1 School of Civil Engineering, Iran University of Science and Technology, P.O. Box 16765-163, Narmak, Tehran, Iran

2 The Centre of Excellence for Fundamental Studies in Structural Engineering, Iran University of Science and Technology, P.O.BOX: 16765-163;Narmak, Tehran, Iran;

3 Department of civil Engineering, East Tehran Branch, Islamic Azad University, Tehran, Iran

Abstract

When the discussion is about the destructive effects of salt spray on the coastal structures, the distance between RC structures and the sea is considered as an important parameter. This parameter allows considering the distance influence on structural durability in order to make a proper decision to protect the structure against the corrosive chloride agent. Since probabilistic methods and modeling at the design stage can save the costs of repair and reconstruction of structures, in this paper, through probabilistic modeling and using Monte Carlo simulation, the probability of reinforcement corrosion initiation has been considered at different distances from seawater as a chloride source. Considering a structure in Caspian Sea condition, the effect of surface chloride reduction is investigated with increasing distance from the sea and its effect on corrosion probability is studied. The results of this study show that by increasing the distance from the sea after 200 meters, the chloride concentration will be significantly reduced. It is also observed that, after 2000 meters, the effect of chloride. Also, it can be seen that with increasing distance, chloride corrosion will not have a significant effect on the durability of reinforced concrete structures. However, further studies are needed regarding the change in the rate of reduction of chloride due to distance from the sea.

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