Predictive convection zone depth of chloride in concrete under chloride environment
Predictive convection zone depth of chloride in concrete under chloride environment
复制标题
氯化物环境下混凝土中氯化物对流区深度的预测
DOI：
10.1016/j.cemconcomp.2016.06.011
复制
发表时间：
2016-09-01
影响因子：
10.5
通讯作者：
Liu, Xiaojie
中科院分区：
文献类型：
--
作者：
Liu, Peng;Yu, Zhiwu;Liu, Xiaojie
假设对流区氯离子浓度与水体影响深度呈线性变化，将氯离子对流区深度应用于Ficic扩散定律，研究潮汐区混凝土氯离子扩散特性。本研究通过人工模拟环境和现场试验来验证和标定氯化物对流区深度模型的合理性。通过探究氯离子浓度与海拔、时间和距海边直线距离之间的相关性，确定了混凝土表面氯离子浓度的分布模型。结果表明，混凝土表面氯化物对流区深度发生变化，并表现为水影响深度的函数。表面氯化物浓度与距海边直线距离之间的关系遵循S曲线函数方程。从表面氯离子浓度、氯离子对流区深度和氯离子扩散系数方面讨论了试验与现场试验氯离子在混凝土中扩散特性的异同。 (C) 2016 Elsevier Ltd. 保留所有权利。
Based on the assumption that chloride concentration and water influential depth change linearly in convective zone, the chloride convection zone depth is used in Ficic's diffusion law to investigate the chloride diffusion characteristic of concrete at tidal zones. In this study, an artificial simulation environment and field tests were carried out to validate and calibrate the rationality of the chloride convection zone depth model. The distribution model of surface chloride concentration in concrete was determined by exploring the correlations among chloride concentration, elevation, time and linear distance from seaside. The results illustrated that the depth of chloride convection zone on the concrete surface varied and manifested in terms of a function of water influential depth. The relation between the surface chloride concentration and the linear distance from the seaside followed an S-curve function equation. The similarities and differences regarding the characteristic of chloride diffusion in concrete between experimental and in-situ test were discussed for surface chloride concentration, chloride convection zone depth and chloride diffusion coefficient. (C) 2016 Elsevier Ltd. All rights reserved.