| 复合因素作用下混凝土硫酸盐侵蚀劣化机理 |
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| 引用本文： | 高润东,赵顺波,李庆斌.复合因素作用下混凝土硫酸盐侵蚀劣化机理[J].建筑材料学报,2009,12(1). |
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| 作者姓名： | 高润东 赵顺波 李庆斌 |
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| 作者单位： | 1. 清华大学,水沙科学与水利水电工程国家重点实验室,北京,100084
2. 华北水利水电学院,土木与交通工程学院,河南,郑州,450011 |
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| 摘 要： | 通过微观和宏观观测,综合揭示了单独硫酸钠溶液侵蚀、亚高温水淬循环和硫酸钠溶液侵蚀交替进行、碳化和硫酸钠溶液侵蚀交替进行3种工况下混凝土受侵蚀劣化规律.研究结果表明:3种工况的主要侵蚀产物均为钙矾石,没有明显检测到石膏和碳硫硅钙石;与单独硫酸钠溶液侵蚀相比,亚高温水淬循环作用加剧了硫酸根离子向混凝土内部的扩散传输,从而造成其强度的显著劣化;碳化层的存在在一定程度上减轻了硫酸根离子的扩散传输,但碳化和硫酸钠溶液侵蚀的交替作用仍导致了混凝土抗压强度下降.
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| 关 键 词： | 混凝土 硫酸盐 侵蚀产物 硫酸根含量 强度 |
Deterioration Mechanisms of Sulfate Attack on Concrete under the Action of Compound Factors |
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| GAO Run-dong,ZHAO Shun-bo,LI Qing-bin.Deterioration Mechanisms of Sulfate Attack on Concrete under the Action of Compound Factors[J].Journal of Building Materials,2009,12(1). |
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| Authors: | GAO Run-dong ZHAO Shun-bo LI Qing-bin |
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| Affiliation: | 1.State Key Laboratory of Hydroscience and Engineering;Tsinghua University;Beijing 100084;China;2.School of Civil Engineering and Communication;North China University of Water Conservancy andElectric Power;Zhengzhou 450011;China |
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| Abstract: | By micro-and macro-observations,the deterioration mechanisms of concrete under three cases such as single sodium sulfate solution attack,alternant action of repeat sub-high temperature/cooling by water and sodium sulfate solution attack,alternant action of carbonation and sodium sulfate solution attack are revealed.Micro-observations include the analysis of attacking products by thermal analysis method and the determination of sulfate-ion content by modified barium sulfate gravimetric method.Macro-observati... |
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| Keywords: | concrete sulfate attacking product sulfate-ion content strength |
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