Modeling of Chloride Penetration into Concrete under Airborne Chloride Environmental Conditions Combined with Washout Effects
Modeling of Chloride Penetration into Concrete under Airborne Chloride Environmental Conditions Combined with Washout Effects
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DOI：
10.3151/jact.15.126
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发表时间：
2017-03
影响因子：
2
通讯作者：
R. Wattanapornprom;T. Ishida
中科院分区：
文献类型：
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作者：
R. Wattanapornprom;T. Ishida
在海洋环境中，混凝土基础设施在空气氯化物侵蚀下的恶化是一个常见问题，这提出了对空气氯化物渗透到混凝土结构中的可靠预测模型的需求，以评估混凝土结构的使用寿命。本研究提出了一种与时间相关的计算模型，用于预测实际环境条件下空气中氯化物进入混凝土的量。该模型通过考虑混凝土表面空气中氯化物的平流和扩散量来计算氯化物渗透量。为了计算空气中氯离子渗透量，假设了混凝土表面干湿部分的比例，并且为了确保准确预测实际环境条件下氯离子对混凝土结构的渗透量，计算中考虑了降雨的冲刷作用。通过实验和现场测量结果的比较验证了所提出的模型。
In marine environments, deterioration of concrete infrastructures under airborne chloride attack is a common problem, which raises the need for a reliable prediction model of airborne chloride penetration into concrete structures to evaluate the service life of concrete structures. This study proposes a time-dependent computational model for predicting the amount of airborne chloride ingress into concrete under actual environmental conditions. The proposed model calculates the amount of chloride penetration by considering the amount of advection and diffusion of airborne chloride on the concrete surface. To compute the amount of airborne chloride penetration, the proportion of dry and wet sections on the concrete surface is assumed, and to ensure accurate prediction of chloride penetration into concrete structures under actual environment conditions, the washout effect of rainfall is taken into account in the calculation. The proposed model was verified through comparison of the experimental and on-site measurement results.