ABSTRACT
The Nanjing Yangtze River Bridge is the first highway and railway bridge on the Yangtze River designed and built by China. It has been in operation for more than 50 years since its opening. Life prediction of the bridge are of great significance to the maintenance and reinforcement as well as the subsequent pipeline transportation. Based on the on-site test data and indoor rapid deterioration test, the carbonation law of concrete is studied. Finally, a mathematical model for predicting carbonation depth based on concrete strength is proposed to predict the remaining life of the double-curved arch approach bridge of Nanjing Yangtze River Bridge. Meanwhile, the carbonation depth and concrete strength detection data of 29 inland river environmental concrete bridges are collected. A practical model for carbonation depth prediction of concrete bridges based on concrete strength is established.
