Reinforced concrete and process for producing thereof

摘要

In the present invention, there is disclosed a reinforced concrete having improved corrosion resistance in which the content of voids in the concrete at the surface of the steel reinforcement is below 0.8 percent, preferably below 0.5 percent, more preferably below 0.2 percent by area of steel and in which there is a layer of solid alkali, preferably at least one micron in thickness on the steel surface. The invention also discloses a process for reducing corrosion of steel reinforcement in concrete which comprises forming a reinforced concrete in which the voids at the steel surface are below 0.8 percent by area of steel and in passing a direct electric current between an anode and the reinforcement as cathode to form a layer of solid alkali at the steel surface, the layer being at least 1 micron in thickness and covering at least 20 percent of the steel surface.