Performance of Corrosion Resistant Reinforcement as Assessed by Accelerated Testing and Long Term Exposure in Chloride Contaminated Concrete

摘要

The transportation systems in North America and around the world often consist of concrete structures. Traditionally, these have been reinforced with carbon steel. Corrosion of metallic reinforcement is generally caused by loss of passivity associated with the ingression of chloride ions into the concrete and/or carbonation. Alternative metallic reinforcements include stainless steel, stainless steel clad, and newly developed alloys. This paper compares the corrosion behavior of several different types of corrosion resistant metallic reinforcement using short-term laboratory tests and long-term outdoor reinforced concrete exposures. Data pertaining to the effects of water-cement ratio, presence of simulated concrete cracks, and reinforcement surface condition are also presented and discussed.