| 冻融循环后腐蚀钢筋与混凝土粘结性能试验研究 |
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| 引用本文： | 王海超,何世钦,贡金鑫. 冻融循环后腐蚀钢筋与混凝土粘结性能试验研究[J]. 混凝土, 2007, 0(8): 1-3,10 |
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| 作者姓名： | 王海超 何世钦 贡金鑫 |
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| 作者单位： | 山东科技大学,土木建筑学院,山东,青岛,266510;清华大学,土木水利学院,北京,100084;大连理工大学,土木水利学院,辽宁,大连,116023 |
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| 基金项目： | 山东省教育厅资助项目 , 辽宁省科技计划 |
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| 摘 要： | 除冰盐不仅造成表面剥蚀,盐溶液渗入结构还引起严重的钢筋锈蚀,外部出现锈胀裂缝,从而造成钢筋与混凝土粘结性能退化.对钢筋混凝土梁式粘结试件在盐水中进行5,15,25次冻融循环,然后对钢筋进行加速腐蚀,与未经历冻融循环、未腐蚀试件的粘结性能进行对比,研究了冻融循环与钢筋腐蚀作用对粘结性能的影响.结果表明,粘结性能随冻融循环次数增加逐渐退化.对于混凝土未锈胀开裂的试件,冻融循环对粘结强度的影响大些;钢筋锈胀后冻融循环对粘结强度的影响减小.
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| 关 键 词： | 钢筋混凝土 冻融循环 粘结强度 腐蚀 |
| 文章编号： | 1002-3550-（2007）08-0001-03 |
| 修稿时间： | 2007-03-06 |
Experimental studies on the bond character between corroded reinforcement and concrete subjected to freeze-thaw cycles |
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| WANG Hai-chao,HE Shi-qin,GONG Jin-xin. Experimental studies on the bond character between corroded reinforcement and concrete subjected to freeze-thaw cycles[J]. Concrete, 2007, 0(8): 1-3,10 |
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| Authors: | WANG Hai-chao HE Shi-qin GONG Jin-xin |
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| Affiliation: | 1. School of Civil and Architectural Engineering, Shandong University of Science and Technology, Qingdao 266510, China; 2. School of Civil Engineering, Tsinghua University,Beijing 100084, China; 3. School of Civil Engineering and Hydraulic, Dalian University of Technology,Dalian 116023, China |
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| Abstract: | The de-icing salt induced surface scaling of concrete.The salt solution could also cause serious corrosion of reinforcement.As a result,the cracking along the reinforcement appeared at the surface of concrete and the bond properties between concrete and reinforcement deteriorated.The bond experiments of reinforced concrete beams specimens which were subjected to 5,15,25 numbers of freezing-thawing cycles and accelerating corrosion were carried out.The effects of freezing-thawing cycles and corrosion on the bond characteristic were studied.The results show that the bond properties of concrete and steel bar decreased with the numbers of freezing-thawing cycles increased.The effect of freezing-thawing cycles on the bond strength was more seriously for the specimens without corrosion cracking than that with corrosion cracking. |
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| Keywords: | reinforced concrete freezing-thawing cycles bond strength corrosion |
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