Mechanistic study on initial passivation and surface chemistry of steel bars in nano-silica cement pastes

doi:10.1016/j.cemconcomp.2020.103661

CORC > 海洋研究所 > 中国科学院海洋研究所 > 海洋腐蚀与防护研究发展中心

	Mechanistic study on initial passivation and surface chemistry of steel bars in nano-silica cement pastes
	Zheng, Haibing 1; Poon, Chi Sun 1; Li, Weihua 2,3
刊名	CEMENT & CONCRETE COMPOSITES
	2020-09-01
卷号	112 页码:14
关键词	Concrete Steel bar Passivation Corrosion Nano-silica
ISSN号	0958-9465
DOI	10.1016/j.cemconcomp.2020.103661
英文摘要	This work studied the passivation of steel bar in cement pastes prepared with and without nano-silica by using electrochemical measurements and surface characterization methods. The results showed that the passivation of steel bar in cement paste was dominated by the chemistry of the pore solution and the evolution over time, which are closely associated with the hydration process of the cement. The addition of nano-silica influenced the alkalinity of the pore solution in cement paste and modified the pore structure of the cement paste, which resulted in a different passivation process and a thicker passive film with a higher proportion of Fe2+ oxides. The intrinsic corrosion resistance of steel bars in concrete prepared with nano-silica was expected to be enhanced.
资助项目	Hong Kong Branch of the National Engineering Research Center for Steel Construction ; National Natural Science Fund for Distinguished Young Scholars[51525903]
WOS研究方向	Construction & Building Technology ; Materials Science
语种	英语
出版者	ELSEVIER SCI LTD
WOS记录号	WOS:000556826200013
内容类型	期刊论文
版本	出版稿
源URL	[http://ir.qdio.ac.cn/handle/337002/168114]
专题	海洋研究所_海洋腐蚀与防护研究发展中心
通讯作者	Poon, Chi Sun
作者单位	1.Hong Kong Polytech Univ, Dept Civil & Environm Engn, Hong Kong, Peoples R China 2.Chinese Acad Sci, Inst Oceanol, Key Lab Marine Environm Corros & Biofouling, Qingdao 266071, Peoples R China 3.Sun Yat Sen Univ, Coll Chem Engn & Technol, Tangjiawan 519082, Zhuhai, Peoples R China
推荐引用方式 GB/T 7714	Zheng, Haibing,Poon, Chi Sun,Li, Weihua. Mechanistic study on initial passivation and surface chemistry of steel bars in nano-silica cement pastes[J]. CEMENT & CONCRETE COMPOSITES,2020,112:14.
APA	Zheng, Haibing,Poon, Chi Sun,&Li, Weihua.(2020).Mechanistic study on initial passivation and surface chemistry of steel bars in nano-silica cement pastes.CEMENT & CONCRETE COMPOSITES,112,14.
MLA	Zheng, Haibing,et al."Mechanistic study on initial passivation and surface chemistry of steel bars in nano-silica cement pastes".CEMENT & CONCRETE COMPOSITES 112(2020):14.