动载-环境耦合作用下氯离子在混凝土中的扩散性能研究

王彩辉; 孙伟; 蒋金洋; 孙国文; 叶邦土; 韩建德

doi:10.13204/j.gyjz201011001

动载-环境耦合作用下氯离子在混凝土中的扩散性能研究

doi: 10.13204/j.gyjz201011001

王彩辉^1,2,
孙伟^1,2,
蒋金洋^1,2,
孙国文^1,2,
叶邦土^1,2,
韩建德^1,2

1.
1. 江苏省土木工程材料重点实验室,南京211189;
2.
2. 东南大学材料科学与工程分院,南京211189

基金项目:

国家高技术发展计划(863)资助项目(2008AA030704);国家重点基础研究发展计划(973)资助项目(2009CB623203)

详细信息

作者简介:
王彩辉，男，1981年出生，博士研究生。E－mail:wangcaihui888888@yahoo.com.cn.

中图分类号: TU528
计量
- 文章访问数: 98
- HTML全文浏览量: 6
- PDF下载量: 109
- 被引次数: 0
出版历程
- 收稿日期: 2010-07-15
- 刊出日期: 2010-11-20

THE STUDY ON DIFFUSION PERFORMANCE OF CHLORIDE ION IN CONCRETE UNDER COUPLING ACTION OF DYNAMIC LOAD AND ENVIRONMENT

1.
1. Jiangsu Key Laboratory of Construction Materials,Nanjing 211189,China;
2.
2. Department of Materials Science and Engineering of South East University,Nanjing 211189,China

摘要

摘要: 为了研究动荷载与环境因素(温度、氯盐)耦合作用下氯离子在混凝土中的传输行为，设计出一套试验机制，以研究此工况下混凝土的饱水性能、不同应力水平下氯离子的传输行为及动载与温度耦合作用下氯离子的传输行为。试验结果显示，此工况下混凝土的饱水度均在99%以上，可认为氯离子在混凝土中的传输以扩散为主;氯离子的扩散系数随应力水平和温度的提高而加快;并得到此条件下氯离子扩散的活化能为19.9 kJ/mol;通过寿命预测模型得到常温下钢筋混凝土大桥的寿命为89.1a。
- 耦合 /
- 动载 /
- 应力水平 /
- 温度 /
- 氯离子 /
- 扩散
Abstract: The diffusion performance of chloride ion in concrete under the coupling action of dynamic load and environment was researched by a new set of experimental mechanism.The experiment was composed of study on saturated performance of concrete,diffusion performance of chloride ion with different stress levels and under coupling action of dynamic load and temperature.The results showed that the transport mechanism of chloride ion in concrete accounted with diffusion due to the 99% of degree of saturation of concrete;diffusion coefficient of chloride ion was increased with the stress level and temperature increase;and the activation energy for chloride diffusion was 19.9 kJ / mol;life of reinforced concrete bridge was 89.1 years obtained by the model of life prediction of reinforced concrete.
- Coupled /
- dynamic load /
- stress level /
- temperature /
- chloride ion /
- diffusion

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参考文献(9)

[2] FRANCOIS R,MASO J C.Effect of Damade in ReinforcedConcrete on Carbonation or Chloride Penetration[J].Cement andConcrete Research,1988(18): 961-970.

赵尚传,盖国晖.荷载作用下混凝土中氯离子侵蚀性研究现状与发展[J].公路,2009(9):264-268.

[3] Gontar W Alex,Joseph P Martin,John S.Effects of CyclicLoading on Chloride Permeability of Plain Concrete[J].ConditionMonitoring of Materials and Structures,2000:95-109.

[4] 陈拴发,廖卫东,郑木莲.腐蚀疲劳下的高性能混凝土渗透性及破坏机理[J].武汉理工大学学报,2005,27(8): 31-34.

[5] Nobuaki Otsuki,Marish S Madlangbayan,Takahiro Nishida,etal.Temperature Dependency of Chloride Induced Corrosion inCorrosion in Concrete [J].Journal of Advanced ConcreteTechnology,2009,7(1): 41-50.

[6] Page C L,Short N R,EI Tarras A.Diffusion of Chloride Ions inHardened Cement Pastes[J].Cement and Concrete Research,1981(11): 395-406.

[7] JTJ 27089 水运工程混凝土试验规程[S].

[8] 李伟文,张根亮,刘江山.荷载作用下混凝土氯离子渗透性研究.第一部分:研究现状和研究方法[J].中国建材科技,2002,11(3):19-25.

[9] Lee M K,Barr B I G.An Overview of the Fatigue Behavior ofPlain and Fiber Reinforced Concrete[J].Cement ＆ ConcreteComposites,2004(26):299-305.

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