Enhanced passivation of galvanized steel bars in nano-silica modified cement mortars

doi:10.1016/j.cemconcomp.2020.103626

	Enhanced passivation of galvanized steel bars in nano-silica modified cement mortars
	Zheng, Haibing 1; Dai, Jian-Guo 1; Hou, Lei 1; Meng, Guozhe 2; Poon, Chi Sun 1; Li, Weihua 2,3
	2020-08-01
发表期刊	CEMENT & CONCRETE COMPOSITES
ISSN	0958-9465
卷号	111 页码:13
通讯作者	Poon, Chi Sun(cecspoon@polyu.edu.hk) ; Li, Weihua(liweihua3@mail.sysu.edu.cn)
摘要	This work investigated the electrochemical behavior of galvanized steel bars in nano-silica modified cement mortars. The internal environmental factors of the mortar were firstly characterized. Then the passivation process of the galvanized steel bars was monitored. The results showed that the presence of nano-silica influenced the passivation process of galvanized steel bars and improved the protective properties of passive film. The morphology of passive film was changed, and the thickness was increased by the addition of nano-silica. The CHZ layer performed as a bonding agent between the galvanized steel and mortar matrix. The addition of nano-silica promoted the formation of gaps at the rebar/mortar interface, and there was no evidence for the presence of a lime-rich layer at the interface.
关键词	Nano-silica Galvanized steel bars Passivation Concrete Corrosion
DOI	10.1016/j.cemconcomp.2020.103626
收录类别	SCI
语种	英语
资助项目	Hong Kong Branch of the National Engineering Research Center for Steel Construction[1-BBYP] ; Hong Kong Branch of the National Engineering Research Center for Steel Construction[1-BBVA] ; National Natural Science Fund for Distinguished Young Scholars[51525903] ; Qingdao National Laboratory for Marine Science and Technology[2017ASTCP-OS09]
WOS研究方向	Construction & Building Technology ; Materials Science
WOS类目	Construction & Building Technology ; Materials Science, Composites
WOS记录号	WOS:000540217400015
出版者	ELSEVIER SCI LTD
引用统计	被引频次：21[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.qdio.ac.cn/handle/337002/167745
专题	海洋环境腐蚀与生物污损重点实验室
通讯作者	Poon, Chi Sun; Li, Weihua
作者单位	1.Hong Kong Polytech Univ, Dept Civil & Environm Engn, Hung Hom, Hong Kong, Peoples R China 2.Sun Yat Sen Univ, Coll Chem Engn & Technol, Tangjiawan 519082, Zhuhai, Peoples R China 3.Chinese Acad Sci, Inst Oceanol, Key Lab Marine Environm Corros & Biofouling, Qingdao 266071, Peoples R China
通讯作者单位	中国科学院海洋研究所
推荐引用方式 GB/T 7714	Zheng, Haibing,Dai, Jian-Guo,Hou, Lei,et al. Enhanced passivation of galvanized steel bars in nano-silica modified cement mortars[J]. CEMENT & CONCRETE COMPOSITES,2020,111:13.
APA	Zheng, Haibing,Dai, Jian-Guo,Hou, Lei,Meng, Guozhe,Poon, Chi Sun,&Li, Weihua.(2020).Enhanced passivation of galvanized steel bars in nano-silica modified cement mortars.CEMENT & CONCRETE COMPOSITES,111,13.
MLA	Zheng, Haibing,et al."Enhanced passivation of galvanized steel bars in nano-silica modified cement mortars".CEMENT & CONCRETE COMPOSITES 111(2020):13.

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