> expanding rust The alkaline environment inside concrete "passivates" the reinforcing bar, greatly reducing the rate of oxidation and changing its form. The

> expanding rust The alkaline environment inside concrete "passivates" the reinforcing bar, greatly reducing the rate of oxidation and changing its form. The problem exists only in concrete that is badly made with poorly chosen aggregate, and in corrosive environments. 1. https://en.wikipedia.org/wiki/Passivation_(chemistry) https://en.wikipedia.org/wiki/Passivation_(chemistry)