[1]余红发,孙伟,麻海燕,等.盐湖地区钢筋混凝土结构使用寿命的预测模型及其应用[J].东南大学学报(自然科学版),2002,32(4):638-642.[doi:10.3969/j.issn.1001-0505.2002.04.023]
 Yu Hongfa,Sun Wei,Ma Haiyan,et al.Prediction model for service life of reinforced concrete structures in salt lakes and its applications[J].Journal of Southeast University (Natural Science Edition),2002,32(4):638-642.[doi:10.3969/j.issn.1001-0505.2002.04.023]
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盐湖地区钢筋混凝土结构使用寿命的预测模型及其应用()
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《东南大学学报(自然科学版)》[ISSN:1001-0505/CN:32-1178/N]

卷:
32
期数:
2002年第4期
页码:
638-642
栏目:
材料科学与工程
出版日期:
2002-07-20

文章信息/Info

Title:
Prediction model for service life of reinforced concrete structures in salt lakes and its applications
作者:
余红发12 孙伟1 麻海燕3 鄢良慧2
1 东南大学材料科学与工程系, 南京 210096; 2 沈阳建筑工程学院材料科学与工程系, 沈阳 110015; 3 东南大学土木工程学院, 南京 210096
Author(s):
Yu Hongfa12 Sun Wei1 Ma Haiyan3 Yan Lianghui2
1 Department of Materials Science and Engineering, Southeast University, Nanjing 210096, China
2 Department of Materials Science and Engineering, Shenyang Architecture and Civil Engineering Institute, Shenyang 110015, China
关键词:
混凝土 使用寿命 模型 氯离子扩散系数 预测
Keywords:
concrete service life model chloride diffusion coefficient prediction
分类号:
TU528
DOI:
10.3969/j.issn.1001-0505.2002.04.023
摘要:
根据Fick扩散定律,推导出综合考虑混凝土的氯离子结合能力、氯离子扩散系数的时间依赖性和混凝土结构微缺陷影响的新扩散方程,建立了用于预测混凝土使用寿命的氯离子扩散理论模型.用暴露于青海盐湖地区的C20和C40混凝土立方体试件对理论模型进行了实验验证,用在青海盐湖地区实际运行19 a的钢筋混凝土结构对理论模型进行了工程验证,结果表明,本文理论模型的预测值与实测值非常吻合,而Fick第二扩散定律与实测值明显不符.此外,运用本文理论模型预测普通钢筋混凝土电杆在盐湖地区的使用寿命仅1.2 a,而抗腐蚀钢筋混凝土电杆的使用寿命能够达到50 a以上.
Abstract:
Based on Fick’s law of diffusion, a new multi-component diffusion equation was deduced, in which the influences of concrete chloride ion binding capacity, time-dependence of chloride diffusivity and micro-defect of concrete structures were taken into consideration. On this basis a theoretical model of chloride ion diffusion for concrete service life prediction is obtained. Experimental evaluations were carried out based on C20 and C40 concrete cubes exposed in Qinghai salt lake, and field evaluations were carried out on basis of steel reinforced concrete structures which had been in Qinghai salt lake for 19a. Both evaluations proved that present model yielded good predictions for concrete exposed to salt lake, while predictions based on Fick’s law of diffusion did not coincide with the test data. Furthermore, present model predicted a service life of 1.2a for ordinary steel reinforced concrete poles in salt lake while service life predictions for anti-corrosion concrete poles might exceed 50a.

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备注/Memo

备注/Memo:
基金项目: 国家自然科学基金重点资助项目(59938170)、国家自然科学基金资助项目(50178044).
作者简介: 余红发(1964—),男,博士生,教授,yuhongfa@hotmail.com; 孙伟(联系人),女,教授,博士生导师,sunwei@seu.edu.cn.
更新日期/Last Update: 2002-07-20