LIFE PREDICTION OF CONCRETE STRUCTURES AFTER ELECTROCHEMICAL CHLORIDE EXTRACTION
Electrochemical chloride extraction (ECE) test of cylinder RC specimens have been made with different extraction duration, 4 weeks, 6 weeks and 8 weeks respectively. After ECE treatment, the ions profile in concrete has been studied. Study has shown that ECE can remarkably reduce the chloride concentration in concrete and change the profile of the chloride ions, but also increase the OH concentration nearby the steel bars. Hence the improvement of the ECE method to concrete durability depends on both chloride extraction and OH- concentration. Nevertheless the ECE can change the chloride diffusion coefficient. Tests have shown that after ECE, the chloride diffusion coefficient of concrete is lesser than that of the original one. In order to made the life prediction of concrete structures treated by ECE, the chloride and OH- profile, the chloride diffusion coefficient after ECE must be take into consideration. In this paper, the life prediction of concrete structures treated by ECE has been made.
Concrete Durability ECE Ion profile Life prediction
Xin-gang ZHOU Zhao-yuan CHEN Bin LIU
Tsinghua University and Yantai University, China Tsinghua University, China Yantai University
国际会议
The 3rd International Conference on The Concrete Future(第三届混凝土未来国际会议)
烟台
英文
551-556
2008-10-17（万方平台首次上网日期，不代表论文的发表时间）