Improving the Service Life of Bridge Concrete Structure of High-speed Railway Exposed to Marine Environment by Adding Nano Alumina-oxide

被引：0
|
作者：
Yang, Zhiqiang [1 ,2 ]
Wang, Zhen [1 ,2 ]
Huang, Fali [1 ,2 ]
Yi, Zhonglai [1 ,2 ]
Jiang, Jinyang [3 ,4 ]
机构：
[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
来源：
Cailiao Daobao/Materials Reports | 2024年 / 38卷 / 07期
基金：
中国国家自然科学基金;
关键词：
Alumina - Aluminum oxide - Chlorine compounds - Concrete buildings - Concretes - Deterioration - Mortar - Railroad transportation - Railroads - Seawater corrosion - Service life - Steel corrosion;
D O I：
10.11896/cldb.22060232
中图分类号：
学科分类号：
摘要：
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. © 2024 Cailiao Daobaoshe/ Materials Review. All rights reserved.
引用
收藏
相关论文
共 3 条
  • [1] Service life management of a concrete structure exposed to a marine environment
    Gulikers, J
    [J]. INTERNATIONAL RILEM WORKSHOP ON LIFE PREDICTION AND AGING MANAGEMENT OF CONCRETE STRUCTURES, 2000, 16 : 113 - 121
  • [2] Freeze-thaw Damage Mechanism and Service Life Prediction of High-speed Railway Ballastless Cast-in-place Track Concrete
    Dong, Haoliang
    Li, Huajian
    Yang, Zhiqiang
    Wen, Jiaxin
    Huang, Fali
    Wang, Zhen
    [J]. Tiedao Xuebao/Journal of the China Railway Society, 2024, 46 (08): : 112 - 120
  • [3] FORECASTING FATIGUE LIFE OF HORIZONTALLY CURVED THIN-WALLED BOX- GIRDER RAILWAY BRIDGE EXPOSED TO CYCLIC HIGH-SPEED TRAIN LOADS
    Verma, Virajan
    Nallasivam, K.
    Wani, Khair Ul Faisal
    [J]. STRUCTURAL INTEGRITY AND LIFE-INTEGRITET I VEK KONSTRUKCIJA, 2023, 23 (03): : 335 - 342
1