According to the Iranian Concrete Regulations and Article 9 of the National Building Regulations, steel rebars should be stored in clean and moisture-free places to prevent rust and dirt on their surface.
There are several ways to prevent rust. Providing a roofed space such as a shed, buying rebar in the short term in accordance with weekly consumption and keeping them above ground level, etc.
Engineer Ebrahim Sabzivand, an expert in the technical office, research and development, said: "A major part of the price of a concrete product is the amount of rebar used in it." Due to the current economic situation in the country, it will not be possible to change the current price of rebar on the one hand and take long-term orders on the other hand in the short term; Therefore, it is necessary to adopt a preventive system to prevent the rebars from rusting.
He said: "The high cost of building a light shed (35 x 36 meters), which is estimated at about five billion rials, led to other methods to be considered, and finally the use of cathodic protection system as a plan to prevent rusting of rebars by me." It was suggested in the civil unit of the technical office.
He pointed out: the cost of using this method will be less than one tenth of the cost of building a shed and can do the protection process well for two to three years. Once the system expires, the protection process will resume for another three years.
The expert of the technical office, research and development regarding the application of cathodic protection system pointed out: Generally in metal transmission lines such as oil and gas transmission lines, high-rise metal buildings and reinforced concrete (cathode reinforcement in concrete) and metal tanks, from This system is used.
In the end, Sabzivand added: "Using this design to prevent rusting of the rebars in the warehouse is perhaps the first time in the province."
This action obliges the electricity distribution companies to prevent the phenomenon of rust, in which the rebars can be stored in the open air without worrying about rust, and the excessive cost of building a shed can be avoided.