Calculation of chloride diffusion coefficient of internal curing concrete based on electrical resistivity

被引：0
作者：
Luo D. [1 ,2 ]
Li F. [1 ,2 ]
Niu D. [1 ,2 ]
机构：
[1] School of Civil Engineering, Xi’an University of Architecture and Technology, Xi’an
[2] State Key Laboratory of Green Building, Xi’an University of Architecture and Technology, Xi’an
来源：
Huazhong Keji Daxue Xuebao (Ziran Kexue Ban)/Journal of Huazhong University of Science and Technology (Natural Science Edition) | 2024年 / 52卷 / 04期
关键词：
chloride diffusion coefficient; concrete durability; concrete electrical resistivity; formation factor; internal curing; pore structure;
D O I：
10.13245/j.hust.240078
中图分类号：
学科分类号：
摘要：
Based on the Nernst-Plank equation，the formation factor was introduced to analysis the influence of ion composition and concentration of concrete pore solution on its conductivity，and a chloride ion diffusion coefficient calculation model based on concrete resistivity was established．Through the concrete resistivity test，the influence of water-binder ratio，internal curing effect and curing conditions on the internally cured concrete resistivity and pore tortuosity was discussed，and the chloride diffusion coefficient obtained by ponding test and resistivity test was compared．Results show that the internal curing concrete with low water-binder ratio has greater resistivity and pore tortuosity than that of the ordinary concrete，and the curing condition has less influence on the resistivity and pore tortuosity of concrete；the concrete resistivity can reflect the chloride ion transport performance in concrete to a certain extent，and the chloride ion diffusion coefficient of concrete obtained by the resistivity test has a good linear correlation with the results obtained by ponding test． © 2024 Huazhong University of Science and Technology. All rights reserved.
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页码：136 / 142
页数：6
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