| 矿物掺合料对除冰盐环境下混凝土氯离子扩散中劣化效应系数的影响 |
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| 引用本文： | 陈浩宇,李俊毅,陈蔚凡.矿物掺合料对除冰盐环境下混凝土氯离子扩散中劣化效应系数的影响[J].中国港湾建设,2007(6):36-38,61. |
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| 作者姓名： | 陈浩宇 李俊毅 陈蔚凡 |
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| 作者单位： | 中交天津港湾工程研究院有限公司,天津,300222 |
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| 摘 要： | 采用化学分析方法,测定了高强混凝土(HSC)和高性能混凝土(HPC)在3种氯盐环境中的自由氯离子分布规律。根据F ick第二扩散定律和相关公式计算了混凝土中氯离子扩散的劣化效应系数(K)。结果表明:在除冰盐环境下,不掺掺合料的HSC存在劣化现象;掺加粉煤灰(FA)的HPC不存在劣化现象;掺加硅灰(SF)能减小混凝土的劣化程度,掺量为5%时效果最佳;双掺硅灰和粉煤灰(SF FA)的HPC不存在劣化现象。
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| 关 键 词： | 高强混凝土(HSC) 高性能混凝土(HPC) 除冰盐环境 劣化效应系数 |
| 文章编号： | 1003-3688（2007）06-0036-03 |
| 收稿时间： | 2007-07-11 |
| 修稿时间： | 2007年7月11日 |
Influence of Mineral Mixtures on the Degradation Index of Chloride Ion Diffusion of Concrete in De-icing Salt Environment |
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| CHEN Hao-yu,LI Jun-yi,CHEN Wei-fan.Influence of Mineral Mixtures on the Degradation Index of Chloride Ion Diffusion of Concrete in De-icing Salt Environment[J].China Harbour Engineering,2007(6):36-38,61. |
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| Authors: | CHEN Hao-yu LI Jun-yi CHEN Wei-fan |
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| Abstract: | The distributive law of free chloride ion of high strength concrete(HSC)and high performance concrete(HPC)were determined by use of the method of chemical analysis in three kinds of de-icing salt environments.The degradation index(K)of chloride ion diffusion of concrtet was calculated according to the second Fick diffusion law and correlation formula.The results show HSC without admixtrues has degradation phenomenon,and there is no degradation phenomenon in HPC mixed with fly ash(FA).The degradation degree of concrtet can be reduced by mixing silica fume(SF),the mix ratio of 5% is best.There is no degradation phenomenon in HPC mixed with silica fume and fly ash. |
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| Keywords: | high strength concrete(HSC) high performance concrete(HPC) de-icing salts environment degradation index(K) |
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