采用60V稳压电源、饱和氢氧化钙溶液、钛金属网阳极对圆柱体混凝土试件进行连续14天的电化学除氯实验,研究不同配合比混凝土试件的通电量、氯离子排出量和混凝土中残余氯离子含量.结果表明:相同电场作用条件下,水灰比越小,混凝土电化学除氯时通过的电量越少,除氯效果越差;掺入硅灰、矿渣使通过混凝土的电量值明显减少,电化学除氯效果变差;掺粉煤灰混凝土的电化学除氯效果接近甚至高于基准混凝土.因此,针对不同配合比混凝土应采用不同的电化学除氯电压和除氯时间才能达到理想除氯效果.
参考文献
| [1] | Broomfield J P.Corrosion of steel in concrete[M].New York:Chapman and Hall,1997.1. |
| [2] | Polder R,Vander H J.Electrochemical realkalisation and chloride removal of concrete,state of the art,laboratory and field experience[A].Proceedings of RILEM conference,rehabilitation of concrete structures[C].Melbourne:RILEM,1992,135. |
| [3] | Hansson I L,Hansson C M.Electrochemical extraction of chlorides from concrete part Ⅰ-ualitafive model of the process[J].Cement and Concrete Research,1993,23 (5):1141. |
| [4] | Yeih W,Chang J J,Hung C C.Selecting an adequate procedure for the electrochemical chloride removal[J].Cement and Concrete Research,2006,36(3):562. |
| [5] | Miguel A C,Maria J S,Guillem V.Effect of type of anodic arrangements on efficiency of electrochemical chloride removal from concrete[J].ACI Materials Journal,2006,103 (4):243. |
| [6] | Fajardo G,Escadeillas G,Arliguie G.Electrochemical chloride extraction (ECE) from steel-reinforced concrete specimens contaminated by "artificial" sea-water[J].Corrosion Science,2006,48(1):110. |
上一张
下一张
上一张
下一张
计量
- 下载量()
- 访问量()
文章评分
- 您的评分：
-
10%
-
20%
-
30%
-
40%
-
50%