华中科技大学学报（自然科学版）2024，Vol.52Issue(4)：136-142,7.DOI:10.13245/j.hust.240078
电阻率法计算内养护混凝土氯离子扩散系数
Calculation of chloride diffusion coefficient of internal curing concrete based on electrical resistivity
摘要
Abstract
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.关键词
混凝土电阻率/内养护/氯离子扩散系数/构成因子/孔隙结构/混凝土耐久性Key words
concrete electrical resistivity/internal curing/chloride diffusion coefficient/formation factor/pore structure/concrete durability分类
建筑与水利引用本文复制引用
罗大明,李凡,牛荻涛..电阻率法计算内养护混凝土氯离子扩散系数[J].华中科技大学学报（自然科学版）,2024,52(4):136-142,7.基金项目
国家自然科学基金资助项目(52278217) （52278217）
陕西省重点研发计划资助项目(2024SF-YBXM-670). （2024SF-YBXM-670）
