湿热环境下混凝土氯离子的输运模型研究及寿命预测
Transport Model and Life Prediction of Chloride in Concrete under Hot and Humid Environment

作者: 赵昆璞 * , 刘宗民 , 毛继泽 :哈尔滨工程大学航天与建筑工程学院,黑龙江 哈尔滨;

关键词: 湿热环境输运模型寿命预测Hot and Humid Environment Transport Model Life Prediction

摘要:
我国南海和东海南部地区混凝土结构,常年处于高温、高湿、高盐度的腐蚀环境下,严重地损害了结构的使用寿命。本文在菲克第二定律的基础上,建立了湿热耦合环境下氯离子的输运模型;采用临界氯离子浓度和钢筋锈蚀宽度作为寿命评估指标,计算了混凝土结构的使用寿命。本文对某跨海大桥的耐久性寿命进行了具体的预测。结果表明:本文建立的湿热耦合环境下氯离子的输运模型可以为相关环境下的混凝土结构耐久性寿命预测提供有益的参考。

Abstract: The concrete structure in the South Sea and the south areas of East Sea is in a high temperature, high humidity and high salinity corrosion environment, which seriously damages the service life of the structure. The transport model of chloride is established based on Fick’s second law under hot and humid coupling environment. The service life of concrete structure is calculated by using the critical chloride concentration and corrosion width of the steel bar as the evaluation index. The durability life of a cross-sea bridge is predicted in this paper. The results show that the transport model of chloride under the humid hot and humid coupling environment can provide a useful reference for the durable life prediction of the concrete structure.

文章引用: 赵昆璞 , 刘宗民 , 毛继泽 (2016) 湿热环境下混凝土氯离子的输运模型研究及寿命预测。 土木工程, 5, 116-124. doi: 10.12677/HJCE.2016.54016

参考文献

[1] 郑晓燕. 氯盐环境下混凝土结构性能劣化机理与试验[M]. 北京: 中国建材工业出版社, 2014: 3-6.

[2] 余红发, 孙伟, 麻海燕, 鄢良慧. 混凝土在多重因素作用下的氯离子扩散方程[J]. 建筑材料学报, 2002, 5(3): 240- 247.

[3] Mangat, P. and Molloy, B. (1994) Prediction of Long-Term Chloride Concentration in Concrete. Materials and Structure, 27, 338-346. http://dx.doi.org/10.1007/BF02473426

[4] Sactta, V. (1993) Analysis of Chloride Diffusion into Partially Saturated Concrete. ACI material journal, 30, 441-451.

[5] 徐强, 俞海勇. 大型海工混凝土结构耐久性研究与实践[M]. 北京: 中国建筑工业出版社, 2004: 88.

[6] 吴瑾, 吴胜兴. 氯离子环境下钢筋混凝土结构耐久性寿命评估[J]. 土木工程学报, 2005, 38(2): 59-63.

[7] Vu, K.A.T. and Stewart, M.G. (2000) Structural Reliability of Concrete Bridges Including Improved Chloride Induced Corrosion Moels. Structural Safety, 22, 313-333. http://dx.doi.org/10.1016/S0167-4730(00)00018-7

[8] 史美伦. 混凝土阻抗谱[M]. 北京: 中国铁道出版社, 2003: 207.

[9] 牛荻涛. 混凝土结构耐久性与寿命预测[M]. 北京: 科学出版社, 2003: 65.

[10] Rodriguez, J., et al. (1996) Corrosion of Reinforcement and Service Life of Concrete. Durability of Building Materials and Components, London, Vol. 7, 1.

[11] 许丽萍, 吴学礼, 黄士元. 含氯环境下混凝土使用寿命预测[J]. 上海建材学院学报, 1994, 7(4): 322-329.

[12] 张宝兰, 卫淑珊. 华南海港钢筋混凝土暴露十年试验[J]. 水运工程, 1999(3): 6-13.

分享
Top