Effect of reverse water pressure on chloride penetration within finite concrete during drying-wetting cycles

被引：29
|
作者：
Ou, Yangli [1 ]
Xu, Meijuan [1 ]
Chen, Deqiang [1 ]
Jiang, Mingjie [1 ]
Xiao, Liang [1 ]
Mei, Guoxiong [1 ,2 ]
机构：
[1] Guangxi Univ, Sch Civil Engn & Architecture, Key Lab Disaster Prevent & Struct Safety, Minist Educ, Nanning 530004, Peoples R China
[2] Guangxi Univ, Guangxi Lab Study Coral Reefs South China Sea, Nanning 530004, Peoples R China
来源：
OCEAN ENGINEERING | 2022年 / 257卷
基金：
中国国家自然科学基金;
关键词：
Finite concrete; Chloride ion invasion; Drying-wetting cycles; Seepage pressure gradient; DIFFUSION; MODEL; REINFORCEMENT; TRANSPORT; CORROSION; ENVIRONMENT; CARBONATION; BEHAVIOR; INGRESS; DEPTH;
D O I：
10.1016/j.oceaneng.2022.111606
中图分类号：
U6 [水路运输]; P75 [海洋工程];
学科分类号：
0814 ; 081505 ; 0824 ; 082401 ;
摘要：
Chloride ions invasion in a finite RC structure is significantly controlled by the hydraulic head difference between the seawater and the soil sides. In this study, the mechanism of chloride convection-diffusion penetration within the finite RC structure under the coupled effect of drying-wetting marine environment and reverse water pressure is investigated by indoor experiments and numerical modelling. The indoor exposure experiment is designed to characterize the temporal-spatial variation of chloride convection-diffusion behaviors in concrete. A chloride invasion model by considering the coupled effect of drying-wetting cycles and reverse water pressure via the COMSOL Multiphysics software is developed. The results indicated that, by comparing the application of reverse water pressure to natural drying-wetting cycles, the concrete surface chloride ion concentration is significantly reduced, and the growth of the unsaturation zone is clearly limited. Seepage pressure gradient restrains the inward transport of chloride ion in time and space within the RC structure further.
引用
收藏
页数：10
相关论文
共 50 条
  • [31] Drying-Wetting Cycles: Effect on Deep Soil Carbon
    Qi, Ji
    Markewitz, Daniel
    Foroughi, Maryam
    Jokela, Eric
    Strahm, Brian
    Vogel, Jason
    SOIL SYSTEMS, 2018, 2 (01) : 1 - 13
  • [32] Chloride ingress behavior of recycled aggregate concrete subjected to sustained compressive loading and drying-wetting cycles
    Bao J.
    Wang Y.
    Mou X.
    Zhang P.
    Yu Z.
    Zhao T.
    Fuhe Cailiao Xuebao/Acta Materiae Compositae Sinica, 2023, 40 (02): : 1015 - 1024
  • [33] Chloride Transport Performance of Basalt-Polypropylene Fiber Reinforced Concrete under Drying-Wetting Cycles
    Su, Li
    Niu, Ditao
    Huang, Daguan
    Fu, Qiang
    ADVANCES IN MATERIALS SCIENCE AND ENGINEERING, 2021, 2021
  • [34] Simulation of chloride ion transport in concrete under the coupled effects of a bending load and drying-wetting cycles
    Cao Tongning
    Zhang Lijuan
    Sun Guowen
    Wang Caihui
    Zhang Ying
    Wang Pengshuo
    Xu Aoxue
    CONSTRUCTION AND BUILDING MATERIALS, 2020, 241
  • [35] Influential depth of moisture transport in concrete subject to drying-wetting cycles
    Li, Kefei
    Li, Chunqiu
    Chen, Zhaoyuan
    CEMENT & CONCRETE COMPOSITES, 2009, 31 (10): : 693 - 698
  • [36] Effects of Sodium Sulfate Attack on Concrete Incorporated with Drying-Wetting Cycles
    Liu, Fang
    You, Zhanping
    Xiong, Rui
    Yang, Xu
    ADVANCES IN CIVIL ENGINEERING, 2021, 2021
  • [37] Chloride diffusion model in cracked fly ash concrete bridge subjected to coastal drying-wetting cycles
    School of Civil Engineering and Mechanics, Jiangsu University, Zhenjiang
    Jiangsu
    212013, China
    Zongguo Gonglu Xuebao, 8 (40-49):
  • [38] Chloride ion transport in coral aggregate concrete subjected to coupled erosion by sulfate and chloride salts in drying-wetting cycles
    Luo, Daming
    Zhou, Meng
    Li, Fan
    Niu, Ditao
    JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T, 2024, 30 : 3251 - 3267
  • [39] The Effect of Drying-Wetting Cycles on the Seismic Properties of an Anisotropic Claystone
    Mitaritonna, G.
    Pineda, J.
    Arroyo, M.
    Romero, E.
    PORO-MECHANICS IV, 2009, : 286 - 293
  • [40] Chloride penetration into recycled aggregate concrete subjected to wetting-drying cycles and flexural loading
    Qi, Bing
    Gao, Jianming
    Chen, Fei
    Shen, Daman
    CONSTRUCTION AND BUILDING MATERIALS, 2018, 174 : 130 - 137
12345