ABSTRACT
Carbonation resistance has received prevalent attention from academia as well as industry during the last few decades. The single influence of carbonation on reinforced concrete structures has been widely considered. However, the combined effect of cyclic loading and carbonation still need to be investigated. Therefore, an optimized test procedure was proposed to simulate the damage mechanism of reinforced concrete beams with combined corrosion. The results showed different carbonation process of tensile concrete corresponding to two different test procedures, which indicated that combined corrosion was more serious than separated effects. And a carbonation model of tensile concrete under combined corrosion was proposed. Subsequently, the model was validated by comparing the prediction results with data from past literature. The research findings are significant for improving the accuracy of evaluation of residual carbonation life of reinforced concrete bridges and early warning of durability protection.
