| 受侵蚀混凝土内硫酸根离子扩散及分布规律试验研究 |
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| 引用本文： | 赵顺波,杨晓明.受侵蚀混凝土内硫酸根离子扩散及分布规律试验研究[J].中国港湾建设,2009(3):26-29. |
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| 作者姓名： | 赵顺波 杨晓明 |
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| 作者单位： | 华北水利水电学院土木与交通学院,河南,郑州,450011 |
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| 基金项目： | 河南省杰出青年科学基金 |
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| 摘 要： | 采用化学分析方法研究了在不同浓度的硫酸钠溶液中长期浸泡腐蚀混凝土中硫酸根离子浓度的分布规律，采用TG—DSC（热重分析-差示扫描量热法）方法研究了混凝土受硫酸盐腐蚀的微观机理。研究表明：混凝土表面硫酸根离子浓度随腐蚀龄期增加而增大，硫酸根离子扩散系数随腐蚀龄期增加而减小。以Fick定律为基础，结合试验结果建立了硫酸钠溶液浸泡条件下的混凝土中硫酸根离子浓度预测模型，提出了混凝土表面硫酸根离子浓度和硫酸根离子在混凝土中的扩散系数计算公式。
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| 关 键 词： | 混凝土 硫酸盐腐蚀 硫酸根离子浓度 扩散系数 TG—DSC方法 |
Experimental Study on Regularity of Sulfate-ion Diffusion and Distribution in Concrete Attacked by Sulfate |
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| ZHAO Shun-bo,YANG Xiao-ming.Experimental Study on Regularity of Sulfate-ion Diffusion and Distribution in Concrete Attacked by Sulfate[J].China Harbour Engineering,2009(3):26-29. |
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| Authors: | ZHAO Shun-bo YANG Xiao-ming |
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| Institution: | North China Institute of Water Conservancy and Hydroelectric Power;Zhengzhou 450011;China |
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| Abstract: | The regularity of sulfate-ion distribution in concrete immersed long time in different concentration of sodium sulfate solution was analyzed by the chemical method,the micro-mechanism of sulfate corrosion and deterioration regularity of concrete strength was verified by the TG-DSC method.It is proved that the sulfate-ion concentration on concrete surface increase with the increase of the corrosion ages,the sulfate-ion diffusion coefficient in concrete decreases with the increase of the corrosion ages.On the... |
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| Keywords: | concrete sodium sulfate corrosion sulfate-ion concentration diffusion coefficient TG-DSC method |
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