| 铁尾矿微粉对混凝土收缩及耐久性能的影响 |
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| 引用本文： | 黄泽轩,侯义辉,宋少民.铁尾矿微粉对混凝土收缩及耐久性能的影响[J].混凝土,2020(5):56-59. |
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| 作者姓名： | 黄泽轩 侯义辉 宋少民 |
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| 作者单位： | 北京建筑大学 建筑结构与环境修复功能材料北京市重点实验室 北京未来城市设计高精尖创新中心绿色建筑和绿色城市关键技术研究与应用创新团队,北京 100044;绍兴市交通投资集团有限公司,浙江 绍兴 312000 |
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| 摘 要： | 为明确铁尾矿微粉对混凝土变形和耐久性的影响,研究了铁尾矿微粉作为混凝土低活性掺合料不同比例替代粉煤灰对混凝土收缩及部分耐久性的影响.试验结果表明:铁尾矿微粉在适宜掺量下替代粉煤灰,可以较好发挥填充的作用,减少混凝土微观缺陷,改善混凝土抗冻融、抗硫酸盐侵蚀性,并能使混凝土孔结构得到改善。
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| 关 键 词： | 铁尾矿微粉 混凝土 收缩 耐久性 孔结构 |
Effect of iron tailings powder on shrinkage and durability of concrete |
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| HUANG Zexuan,HOU Yihui,SONG Shaomin.Effect of iron tailings powder on shrinkage and durability of concrete[J].Concrete,2020(5):56-59. |
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| Authors: | HUANG Zexuan HOU Yihui SONG Shaomin |
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| Affiliation: | (Green Building and Key Technology Research and Application Innovation Team,Beijing Key Laboratory of Building Structure and Environmental Restoration,Beijing Future Urban Design Center,Beijing University of Civil Engineering and Architecture,Beijing 100044,China;Shaoxing Communications Investment Group Co.,Ltd.,Shaoxing 312000,China) |
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| Abstract: | In order to clarify the effect of iron tailings powder on the deformation and durability of concrete,the effect of iron tailings powder replacing fly ash in different proportions as low active admixture of concrete on shrinkage and partial durability of concrete was studied.The test results show that the iron tailings fine powder can replace the fly ash under suitable dosage,which can play a better filling role,reduce concrete micro-defects,improve the freeze-thaw resistance and sulfate resistance of concrete,and improve the pore structure of concrete. |
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| Keywords: | iron tailings powder concrete shrinkage durability pore structure |
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