| 电化学沉积法修复钢筋混凝土裂缝的机理 |
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| 引用本文： | 蒋正武,孙振平,王培铭.电化学沉积法修复钢筋混凝土裂缝的机理[J].同济大学学报(自然科学版),2004,32(11):1471-1475. |
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| 作者姓名： | 蒋正武 孙振平 王培铭 |
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| 作者单位： | 同济大学,材料科学与工程学院,上海,200092 |
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| 基金项目： | 上海市青年科技启明星计划资助项目(04qmx1428);同济大学工科基金资助项目 |
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| 摘 要： | 设计了电化学沉积法修复钢筋混凝土裂缝的试验装置 ,试验研究了裂缝中沉积物的成分、形貌以及裂缝愈合效果 .探讨了电化学沉积原理、电极反应 ,并提出裂缝愈合机理 .研究表明 ,电极间电势差引起的电极反应是电化学沉积的动因 ;电流密度是混凝土裂缝愈合效果的一个重要因素 .裂缝愈合机理在于电解反应生成的产物在裂缝中诱导成核 ,生成不溶性晶体 ,从而使裂缝密实、愈合 .
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| 关 键 词： | 电化学沉积 钢筋混凝土 裂缝 机理 |
| 文章编号： | 0253-374X(2004)11-1471-05 |
Mechanism on Rehabilitation of Cracks in Reinforced Concrete Using Electrodeposition Technique |
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| JIANG Zheng-wu,SUN Zhen-ping,WANG Pei-ming.Mechanism on Rehabilitation of Cracks in Reinforced Concrete Using Electrodeposition Technique[J].Journal of Tongji University(Natural Science),2004,32(11):1471-1475. |
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| Authors: | JIANG Zheng-wu SUN Zhen-ping WANG Pei-ming |
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| Abstract: | An experimental device of electrodeposition method for rehabilitation of cracks in reinforced concrete was designed. Components and patterns of deposits in cracks and crack healing effectiveness were studied in the experiment. Electrodeposition mechanism and polarization reaction were discussed and mechanism of crack healing was proposed. The research indicates that polarization reaction resulting from electric potential difference between electrodes is the cause of electrodeposition. Current density plays an important role on healing effectiveness of concrete cracks. Crack healing mechanism lies in that product produced by cell reaction inducing into nucleation and forming insoluble crystals in cracks, and consequently concrete cracks are densified and healed. |
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| Keywords: | electrodeposition reinforced concrete crack mechanism |
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