| 不同锈蚀条件下混凝土内钢筋锈蚀物膨胀性能比较和机理分析 |
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| 引用本文： | 姬永生,袁迎曙,宋萌,申建立,徐从宇.不同锈蚀条件下混凝土内钢筋锈蚀物膨胀性能比较和机理分析[J].北京工业大学学报,2011,37(11):1677-1683. |
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| 作者姓名： | 姬永生 袁迎曙 宋萌 申建立 徐从宇 |
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| 作者单位： | 中国矿业大学深部岩土力学与地下工程国家重点实验室,江苏徐州221008;中国矿业大学力学与建筑工程学院,江苏徐州221008;中国矿业大学力学与建筑工程学院,江苏徐州,221008 |
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| 基金项目： | 国家自然科学基金资助项目(50538070,51178455) |
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| 摘 要： | 不同条件下混凝土中钢筋锈蚀产物的成分不同,膨胀倍数不同,胀力也不同.本文利用X射线衍射技术分析了不同锈蚀条件(人工气候环境、实际自然环境、恒电流通电)、不同锈蚀程度(开裂前后)钢筋锈蚀产物的物质组成和相对含量,推导了钢筋锈蚀层的体积膨胀系数的计算方法,并根据各锈蚀产物的相对含量,确定了在不同条件下混凝土中钢筋锈蚀层的体积膨胀倍数.研究表明,虽然不同锈蚀条件下,混凝土内钢筋锈蚀层中的各锈蚀产物相对含量不同,但不同侵蚀条件下锈蚀产物膨胀倍数却较为接近,约为2.20～2.45,通电加速锈蚀试样中钢筋锈蚀产物的体积膨胀倍数略小于人工气候加速环境和实际自然环境条件下钢筋锈蚀产物的体积膨胀倍数,气候条件对锈蚀产物的体积膨胀倍数没有明显的影响.
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| 关 键 词： | 钢筋锈蚀物 X-射线衍射 物相组成 体积膨胀倍数 |
Volume Expansion Characteristic and Mechanism of Rebar Corrosion Products in Concrete with Different Corrosion Approaches |
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| JI Yong-sheng,YUAN Ying-shu,SONG Meng,SHEN Jian-li,XU Cong-yu.Volume Expansion Characteristic and Mechanism of Rebar Corrosion Products in Concrete with Different Corrosion Approaches[J].Journal of Beijing Polytechnic University,2011,37(11):1677-1683. |
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| Authors: | JI Yong-sheng YUAN Ying-shu SONG Meng SHEN Jian-li XU Cong-yu |
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| Affiliation: | JI Yong-sheng1,2,YUAN Ying-shu2,SONG Meng2,SHEN Jian-li2,XU Cong-yu2(1.State Key Laboratory for Geomechanics and Deep Underground Engineering,Xuzhou 221008,Jiangsu,China,2.School of Mechanics & Civil Engineering,China University of Mining and Technology,China) |
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| Abstract: | The phase component and content percentage of rebar corrosion products in concrete with different corrosion approaches are different,so the volume expansion multiple and corroded expansion effects of rebar corrosion products are also different.The phase component and content percentage of corrosion products in different chloride corroding ways(invaded by chloride and mixed into chloride),different corroding extents(before and after cracking) and different test conditions(artificial accelerated climate envir... |
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| Keywords: | rebar corrosion products X-ray diffraction phase component volume expansion multiple |
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