Surface free chloride concentration and apparent chloride diffusion coefficient of coral seawater concrete

被引：12

作者：

Da B. ^{[1
]}

Yu H. ^{[1
]}

Ma H. ^{[1
]}

Zhang Y. ^{[2
]}

Tan Y. ^{[1
]}

Mi R. ^{[1
]}

Dou X. ^{[1
]}

机构：

[1] Department of Civil Engineering, Nanjing University of Aeronautic and Astronautic, Nanjing

[2] State Key Laboratory of Disaster Prevention and Mitigation of Explosion and Impact, PLA University of Science and Technology, Nanjing

来源：

Dongnan Daxue Xuebao (Ziran Kexue Ban)/Journal of Southeast University (Natural Science Edition) | 2016年 / 46卷 / 05期

关键词：

Apparent chloride diffusion coefficient; Coral seawater concrete(CSC); Exposure time; Magnesium sulfate cement; Surface free chloride concentration;

D O I：

10.3969/j.issn.1001-0505.2016.05.033

中图分类号：

学科分类号：

摘要：

Coral seawater concrete (CSC) with different strength grades were prepared by using different cements. The distribution laws of the free chloride concentrations of CSC in seawater environment with different exposure times were studied. The surface free chloride concentration and the apparent chloride diffusion coefficient of CSC were calculated and the corresponding influences of the exposure time were discussed. The results show that with the same exposure time, the ability to resist chloride diffusion of magnesium sulfate cement is better than that of ordinary cement. The surface free chloride concentration of CSC increases with the extension of the exposure time in an exponential form, and the growth rate is far lower than that of ordinary concrete. The apparent chloride diffusion coefficient of CSC decreases with the extension of the exposure time in a power function. Therefore, magnesium sulfate cement is recommended for actual CSC structures in marine environment, which can improve the ability to resist chloride diffusion and slow down the speed of chloride ion intrusion to prolong the service life of structures. © 2016, Editorial Department of Journal of Southeast University. All right reserved.

引用

页码：1093 / 1097

页数：4

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