Abstract: To study the mechanical performance of recycled aggregate concrete (RAC) columns under sustained loads and chloride corrosion, we design ten sample columns of large eccentric compressive reinforced RAC and test them using three variables: replacement rate of recycled aggregate, loading strength, and corrosion rate of steel. In the experiment, the columns are electrically corroded under sustained load, and then their bearing capacity and corrosion rate of reinforcement steel bars are measured. And stiffness and ductility are also examined. The results show that the number of rust expansion cracks and the corrosion rate of longitudinal reinforcement both increase with the increase in replacement rate or loading strength. With an increase in replacement rate, stiffness, bearing capacity and ductility decrease, but the varying trends in loading strength are different. A higher corrosion rate results in significantly larger opening of rust expansion cracks and lower stiffness and bearing capacity. When corrosion rate increases, ductility decreases at the corrosion rate greater than 3% while it remains nearly the same at the rate lower than 3% as in the no corrosion cases. The strain distribution over a column section satisfies the plane section assumption. Our measurements of bearing capacity agree well with the calculations obtained using an analytical formula for bearing capacity of corroded reinforced concrete columns.