期刊
MATERIALS
卷 13, 期 6, 页码 -出版社
MDPI
DOI: 10.3390/ma13061480
关键词
reinforced concrete; sea sand; durability; inhibitor; bidirectional electromigration(BIEM)
类别
资金
- National Natural Science Foundation of China [51878610, 51778578]
- Natural Science Foundation of Zhejiang Province [LY18E080003, LY17E08007, LQ19E080012, LQ19E080011]
- Public Welfare Foundation of Ningbo [2019C50015]
- Philosophy and Social Sciences Planning Project of the Ministry of Education [17YJCZH135]
- Science and Technology Project of Ningbo [2019B10049]
Concrete made with sea sand and seawater is rich in chlorine ions which are the main factors that induce corrosion of the reinforcement. In this study, an innovative method to rehabilitate reinforcement is presented; the concentrations of chloride ions and the corrosion inhibitor in concrete were measured. Electrochemical chloride extraction (ECE) was applied as a control experiment via using saturated Ca(OH)2 solution as an external electrolyte. Bidirectional electromigration (BIEM)technology combined with the corrosion inhibitor could not only remove the chloride ions but also protect the steel bar in concrete, and animidazoline inhibitor mixed in concrete is more effective than thetriethylenetetramine inhibitor due to the specific molecular structure. It was found that the optimum ratio of N/Cl reached the maximum value 3.3, when the concentration of inhibitor was 1. Meanwhile, the experimental results also revealed that the corrosion inhibitor and chloride ion concentrations reached necessary levels on the surface of the steel, and the corrosion inhibitor migrated effectively. Overall, the contents of imidazoline and triethylenetetramine inhibitor in seawater concrete are0.75% and 1%, respectively. The results demonstrate that the addition of the corrosion inhibitor and the application of bidirectional electromigration would effectively improve the durability of reinforced concrete containing sea sand and seawater.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据