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材料导报  2024, Vol. 38 Issue (7): 22060232-8    https://doi.org/10.11896/cldb.22060232
  无机非金属及其复合材料 |
纳米氧化铝提升海洋环境高速铁路桥梁混凝土结构服役寿命研究
杨志强1,2, 王振1,2, 黄法礼1,2, 易忠来1,2, 蒋金洋3,4,*
1 中国铁道科学研究院集团有限公司铁道建筑研究所,北京 100081
2 高速铁路轨道系统全国重点实验室,北京 100081
3 东南大学材料科学与工程学院,南京 211189
4 东南大学江苏省土木工程材料重点实验室,南京 211189
Improving the Service Life of Bridge Concrete Structure of High-speed Railway Exposed to Marine Environment by Adding Nano Alumina-oxide
YANG Zhiqiang1,2 , WANG Zhen1,2, HUANG Fali1,2, YI Zhonglai1,2, JIANG Jinyang3,4,*
1 Railway Engineering Research Institute, China Academy of Railway Science Corporation Limited, Beijing 100081, China
2 State Key Laboratory for Track System of High-speed Railway, Beijing 100081, China
3 School of Materials Science and Engineering, Southeast University, Nanjing 211189, China
4 Jiangsu Key Laboratory of Construction Materials, Southeast University, Nanjing 211189, China
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摘要 氯离子传输并诱导内部钢筋锈蚀是海洋环境高速铁路桥梁混凝土结构耐久性失效的主要原因之一,增大混凝土氯离子传输阻力是提升混凝土结构服役寿命的根本途径。纳米技术与纳米材料的发展为混凝土材料高性能化提供了新的可能。本工作研究了纳米氧化铝(NA)对砂浆氯离子电迁移系数(DRCM)与自然扩散系数的影响,基于氯离子等温吸附曲线,建立了考虑氯离子结合参数的氯盐传输模型,分析了NA对氯盐侵蚀环境下混凝土结构服役寿命的影响。结果表明:适宜掺量的NA可降低砂浆氯离子传输性能;承台桩基础混凝土钢筋保护层厚度为60 mm时,在C45混凝土中掺入2%(质量分数)NA后,仅考虑氯离子侵蚀时混凝土预期服役寿命由68年提升至107年。NA为提升海洋环境下高速铁路混凝土结构服役寿命提供了新的技术途径。
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杨志强
王振
黄法礼
易忠来
蒋金洋
关键词:  高速铁路  混凝土  氯离子  纳米氧化铝  服役寿命    
Abstract: Chloride-induced steel corrosion is one of the main deterioration mechanisms that lead to the durability issue of bridge concrete structures of high-speed railway exposed to marine environment. Improving the chloride resistance of concrete is the fundamental way to increase the service life of concrete structure. The development of nano technology and nano material provides a novel research direction towards higher performance concrete. In this work, the influence of nano alumina oxide (NA) on the chloride migration coefficient (DRCM) and natural diffusion properties of mortar were firstly investigated. Based on the chloride binding isotherms, the chloride diffusion model with binding parameters of concrete were established. Meanwhile, the influence of NA on service life of concrete structures under chloride environment was simulated. The results show that the chloride resistance of mortar can be improved with an appropriate content of NA. With a protective layer of 60 mm and an addition of 2wt%NA, the service life of bearing platform C45 concrete is increased from 68 years to 107 years. The addition of NA provides a novel technology for prolonging the service life of concrete structures of high-speed railway exposed to marine environment.
Key words:  high-speed railway    concrete    chloride    nano alumina-oxide    service life
出版日期:  2024-04-10      发布日期:  2024-04-11
ZTFLH:  TU528  
基金资助: 国家自然科学基金(51925903;U1934206;52178260)
通讯作者:  蒋金洋,东南大学首席教授、博士研究生导师,国家杰出青年科学基金获得者,万人计划科技创新领军人才,长期专注于严酷环境下高性能混凝土绿色化设计及制备、混凝土性能跨尺度高效设计等领域研究。主持国家重点研发计划课题、国家自然科学基金等科研项目20余项,发表SCI和EI收录论文120余篇,授权国家发明专利20余项,编制国家/行业/团体标准5部。获国家科技进步二等奖1项、省部级一等奖5项、教育部科技进步二等奖2项。jiangjinyang16@163.com   
作者简介:  杨志强,2013年6月、2016年6月于重庆大学获得工学学士学位和硕士学位,2021年9月于东南大学获得工学博士学位。现为中国铁道科学研究院集团有限公司助理研究员,主要研究领域为高速铁路高性能混凝土、混凝土结构耐久性,发表相关SCI/EI论文10余篇。
引用本文:    
杨志强, 王振, 黄法礼, 易忠来, 蒋金洋. 纳米氧化铝提升海洋环境高速铁路桥梁混凝土结构服役寿命研究[J]. 材料导报, 2024, 38(7): 22060232-8.
YANG Zhiqiang, WANG Zhen, HUANG Fali, YI Zhonglai, JIANG Jinyang. Improving the Service Life of Bridge Concrete Structure of High-speed Railway Exposed to Marine Environment by Adding Nano Alumina-oxide. Materials Reports, 2024, 38(7): 22060232-8.
链接本文:  
https://www.mater-rep.com/CN/10.11896/cldb.22060232  或          https://www.mater-rep.com/CN/Y2024/V38/I7/22060232
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