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
Source Publication	CEMENT & CONCRETE COMPOSITES
ISSN	0958-9465
Volume	111 Pages:13
Corresponding Author	Poon, Chi Sun(cecspoon@polyu.edu.hk) ; Li, Weihua(liweihua3@mail.sysu.edu.cn)
Abstract	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.
Keyword	Nano-silica Galvanized steel bars Passivation Concrete Corrosion
DOI	10.1016/j.cemconcomp.2020.103626
Indexed By	SCI
Language	英语
Funding Project	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 Research Area	Construction & Building Technology ; Materials Science
WOS Subject	Construction & Building Technology ; Materials Science, Composites
WOS ID	WOS:000540217400015
Publisher	ELSEVIER SCI LTD
Citation statistics	Cited Times:1[WOS] [WOS Record] [Related Records in WOS]
Document Type	期刊论文
Identifier	http://ir.qdio.ac.cn/handle/337002/167745
Collection	海洋环境腐蚀与与生物污损重点实验室
Corresponding Author	Poon, Chi Sun; Li, Weihua
Affiliation	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
Corresponding Author Affilication	Institute of Oceanology, Chinese Academy of Sciences
Recommended Citation 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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