Experimental and Numerical Study on Chloride Transport in Unsaturated Concrete: Highlighting Temperature, Humidity, and Mineral Admixtures

被引:2
|
作者
Du, Zhantao [1 ,2 ]
Jin, Zuquan [1 ,2 ]
Li, Shicai [1 ,2 ]
Xue, Huan [1 ,3 ]
Zhao, Rui [1 ]
机构
[1] Qingdao Univ Technol, Sch Civil Engn, Qingdao 266520, Peoples R China
[2] Minist Educ, Engn Res Ctr Concrete Technol Marine Environm, Qingdao 266520, Peoples R China
[3] Qingdao Branch Beijing Zhongchang Engn Consulting, Qingdao 266520, Peoples R China
基金
中国国家自然科学基金;
关键词
unsaturated concrete; chloride transport; diffusion coefficient; numerical simulation; mineral admixtures; temperature-humidity coupling; PENETRATION; PROFILES; MOISTURE;
D O I
10.3390/ma17040930
中图分类号
O64 [物理化学(理论化学)、化学物理学];
学科分类号
070304 ; 081704 ;
摘要
Chloride transport within concrete is critical for the durability of reinforced concrete structures; however, its diffusion under the coupling action of temperature and humidity has not been fully comprehended. Therefore, in this work, the coupling effects of temperature, relative humidity, and mineral admixtures on chloride transport in concrete were investigated through experimental and numerical simulation work. The results show that the chloride diffusion coefficient decreases with the decreased temperature and growth of relative humidity; however, the chloride concentration on the concrete surface is increased with the growth of temperature and relative humidity. Moreover, compounding about 15% fly ash (FA) and 30% granulated ground blast furnace slag (GGBS) to replace the cement is the most beneficial for improving the antichloride capacity of concrete, considering also the strength. In addition, the numerical simulation considering the coupled effect of temperature and relative humidity of chloride transport in concrete has good agreement with that of experimental results.
引用
收藏
页数:15
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