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

doi:10.1016/j.conbuildmat.2021.125878

	Diffusion behavior of chloride in coral aggregate concrete in marine salt-spray environment
	Huang, Daguan 1,2; Niu, Ditao 3; Su, Li 4; Liu, Yunhe 1,2; Guo, Bingbing 3; Xia, Qian 1; Peng, Gang 3
	2022-01-17
发表期刊	Construction and Building Materials
ISSN	0950-0618
卷号	316
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
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
DOI	10.1016/j.conbuildmat.2021.125878
收录类别	EI ; SCIE
语种	英语
WOS研究方向	Construction & Building Technology ; Engineering ; Materials Science
WOS类目	Construction & Building Technology ; Engineering, Civil ; Materials Science, Multidisciplinary
WOS记录号	WOS:000753465700003
出版者	Elsevier Ltd
EI入藏号	20214811256462
EI主题词	Concrete aggregates
EI分类号	412 Concrete ; 539.1 Metals Corrosion ; 801 Chemistry ; 951 Materials Science
来源库	WOS
引用统计	被引频次：17[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	https://ir.lut.edu.cn/handle/2XXMBERH/157874
专题	兰州理工大学
通讯作者	Huang, Daguan; Niu, Ditao; Su, Li; Liu, Yunhe; Peng, Gang
作者单位	1.Xian Univ Technol, Sch Civil Engn & Architecture, Xian 710048, Peoples R China; 2.Xian Univ Technol, State Key Lab Base Ecohydraul Engn Arid Area, Xian 710048, Peoples R China; 3.Xian Univ Architecture & Technol, Coll Civil Engn, Xian 710055, Peoples R China; 4.Lanzhou Univ Technol, Key Lab Disaster Prevent & Mitigat Civil Engn Gan, Lanzhou 730050, Peoples R China
通讯作者单位	土木工程学院; 兰州理工大学
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).