| 矿物掺合料对海工混凝土长寿命化的影响 |
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| 引用本文： | 屠柳青,李遵云,秦明强.矿物掺合料对海工混凝土长寿命化的影响[J].公路,2011(5):167-170. |
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| 作者姓名： | 屠柳青 李遵云 秦明强 |
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| 作者单位： | 武汉理工大学;中交武汉港湾工程设计研究院有限公司;长大桥梁建设施工技术交通行业重点实验室; |
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| 基金项目： | 国家科技部科研院所技术开发研究专项,项目编号NCSTE-2007-JKZX-222 |
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| 摘 要： | 综合研究了单掺粉煤灰、矿粉及硅灰对混凝土氯离子扩散系数、氯离子结合能力及临界氯离子浓度的影响,探讨了海工混凝土长寿命化机理.研究结果表明,掺人矿物掺合料后,改善了混凝土的抗氯离子渗透性能,增强了氯离子结合能力,临界氯离子浓度虽略有降低,但钢筋发生锈蚀的时间明显延长,提高了混凝土的使用寿命.
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| 关 键 词： | 海工混凝土 矿物掺合料 氯离子扩散系数 氯离子结合 临界氯离子浓度 长寿命化 |
Effects of Mineral Admixture on Service Life of Marine Concrete |
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| TU Liu-qing,LI Zun-yun,QIN Ming-qiang.Effects of Mineral Admixture on Service Life of Marine Concrete[J].Highway,2011(5):167-170. |
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| Authors: | TU Liu-qing LI Zun-yun QIN Ming-qiang |
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| Institution: | TU Liu-qing1,2,3,LI Zun-yun2,QIN Ming-qiang2,3(1.Wuhan University of Technology,Wuhan 430070,China,2.CCCC Wuhan Harbor Engineering Design & Research Institute Co.,Ltd,Wuhan 430071,3.Key Lab of Large-Span Bridge Construction Technology,Ministry of Transport,China) |
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| Abstract: | The effects of mineral admixtures(such as fly ash,slag and silica fume) on the chloride diffusion coefficient,chloride binding and chloride threshold level are investigated respectively.The results indicate that the mineral admixtures improved the resistance of concrete to the penetration of chlorides and raised the chloride binding capacity.Although the threshold chloride levels for corrosion are found to decrease with increasing mineral admixtures content,the time-to-corrosion of steel is delayed and the ... |
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| Keywords: | mineral admixture chloride diffusion coefficient chloride binding chloride threshold service life |
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