海洋大气区氯离子在混凝土中的沉积与传输行为研究综述
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作者单位:

1.内蒙古科技大学;2.中国科学院海洋研究所;3.中国人民解放军92690部队

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基金项目:

应用基础研究项目(CHJ17J033);中国科学院战略性先导科技专项子课题(XDA13040402)


A review on the deposition and transport behavior of chloride ions in concrete in marine atmosphere
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Affiliation:

1.Inner Mongolia University of Science and Technology;2.92690 Force PLA

Fund Project:

Applied basic research projects(No.CHJ17J033);Sub-project of the strategic priority research program of CAS (No.XDA13040402)

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    摘要:

    海洋大气区氯离子对钢筋混凝土的侵蚀行为可分为两个阶段,首先是氯离子在风力作用下附着到混凝土表面的过程,然后再从混凝土表面进而向混凝土内部侵蚀的过程。此文基于海洋大气区氯离子对混凝土侵蚀的全过程,对国内外的已有研究进行了归纳总结,一方面阐述了各影响因素对沉积过程的影响规律,其中海水含盐量、风速、暴露时间与混凝土氯离子沉积量呈正相关关系,距海岸距离与混凝土氯离子沉积量呈负相关关系;另一方面论述了各影响因素对传输过程的影响规律,水灰比越大、暴露时间越长、温度越高、内外湿度梯度越大越容易形成对流区。目前针对海洋大气区氯离子在混凝土中沉积和传输行为所开展研究多基于单因素,多因素耦合作用下的沉积和传输行为尚需进一步研究。

    Abstract:

    The erosion behaviors of chloride ions on reinforced concrete in marine atmosphere can be divided into two phases. At first, chloride ions attach to the surface of concrete in the effect of wind, and then erode from the surface of concrete to the inside. This article which based on the whole process of chloride ions erode on concrete in marine atmosphere, has summarized existing research both at domestic and abroad. On the one hand, this essay expounds the various influencing factors on the influence of deposition process, including the salinity of water, wind speed, the time of exposure were positively correlated with the amount of chloride ions deposited in concrete. The distance from the coast were negatively correlated with the amount of chloride ions deposited in concrete. On the other hand, discussing the influence of transfer process from the various influencing factors. The higher water-cement ratio, the longer exposure time, the higher temperature, the greater internal and external humidity gradient, the easier to form the convection zone. At present, the researches which aim at the deposition and transport behavior of chloride ions in marine atmosphere are based on a single factor. The deposition and transport behaviors under the coupling of multiple factors need to be further studied.

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  • 收稿日期:2019-07-31
  • 最后修改日期:2019-10-22
  • 录用日期:2019-11-27
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