Diffusion behavior of chloride in coral aggregate concrete in marine salt-spray environment

doi:10.1016/j.conbuildmat.2021.125878

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	Diffusion behavior of chloride in coral aggregate concrete in marine salt-spray environment
	Huang, Daguan 1,3; Niu, Ditao 2; Su, Li 4; Liu, Yunhe 1,3; Guo, Bingbing 2; Xia, Qian 3; Peng, Gang 2
刊名	Construction and Building Materials
	2022-01-17
卷号	316
关键词	Chlorine compounds Concrete mixtures Corrosion resistance Deterioration Diffusion Fly ash Thermogravimetric analysis Aggregate concrete Basalt fiber Chloride concentrations Chloride distribution Convection zone Coral aggregate concrete Depth of convection zone Diffusion behavior Peak chloride concentration Salt spray
ISSN号	0950-0618
DOI	10.1016/j.conbuildmat.2021.125878
英文摘要	In this study, the chloride diffusion behavior of coral aggregate concrete (CAC) in a salt-spray environment was investigated. Ten concrete groups were designed using different mix proportions, and the concrete samples were exposed to a salt-spray environment for 180 days. The effects of the aggregate type, CAC strength grade, fly ash (FA) content, and basalt fiber (BF) content on chloride ion diffusion were analyzed. The results showed that the chloride concentration of CAC was higher than that of ordinary aggregate concrete. The chloride corrosion resistance of CAC could be effectively improved by adding 30% FA or 0.1% BF to the concrete mix, and the peak chloride concentration decreases by 15.9% and 16.3%, respectively. The peak chloride concentration of concrete appeared at 3–5 mm in the concrete and exhibited a power function increase with the exposure time. In addition, a model for calculating the peak chloride concentration was established. The chloride diffusion coefficient decreased with an increase in exposure time. When the BF content was 0.1%, the chloride diffusion coefficient was the smallest. X-ray diffraction and thermogravimetric analysis were performed to analyze the erosion products, and the deterioration mechanism of the CAC in the salt-spray environment was determined. © 2021 Elsevier Ltd
语种	英语
出版者	Elsevier Ltd
内容类型	期刊论文
源URL	[http://ir.lut.edu.cn/handle/2XXMBERH/157874]
专题	兰州理工大学
作者单位	1.State Key Laboratory Base of Eco-hydraulic Engineering in Arid Area, Xi'an University of Technology, Xi'an; 710048, China; 2.College of Civil Engineering, Xi'an University of Architecture & Technology, Xi'an; 710055, China; 3.School of Civil Engineering and Architecture, Xi'an University of Technology, Xi'an; 710048, China; 4.Key Laboratory of Disaster Prevention and Mitigation in Civil Engineering of Gansu Province, Lanzhou University of Technology, Lanzhou; 730050, China
推荐引用方式 GB/T 7714	Huang, Daguan,Niu, Ditao,Su, Li,et al. Diffusion behavior of chloride in coral aggregate concrete in marine salt-spray environment[J]. Construction and Building Materials,2022,316.
APA	Huang, Daguan.,Niu, Ditao.,Su, Li.,Liu, Yunhe.,Guo, Bingbing.,...&Peng, Gang.(2022).Diffusion behavior of chloride in coral aggregate concrete in marine salt-spray environment.Construction and Building Materials,316.
MLA	Huang, Daguan,et al."Diffusion behavior of chloride in coral aggregate concrete in marine salt-spray environment".Construction and Building Materials 316(2022).