Abstract
Reinforced concrete specimens with pre-induced cracks were subjected to a long-term exposure test in order to observe the development of rebar corrosion under the condition of cold rural districts. After 42 years exposure, inspection results showed that the time at which the rebar would start to corrode was affected by the crack width and that the rebar corrosion rate was under about 0.004 mm/yr. Based on the above-mentioned inspection results and the past references, deterioration prediction of concrete structures was carried out. As the result, it is considered that bearing capacity and durability of concrete structures are not seriously hampered by rebar corrosion.
