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

doi:10.1016/j.cemconcomp.2020.103661

	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
	2020-09-01
发表期刊	CEMENT & CONCRETE COMPOSITES
ISSN	0958-9465
卷号	112 页码:14
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.
关键词	Concrete Steel bar Passivation Corrosion Nano-silica
DOI	10.1016/j.cemconcomp.2020.103661
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 ; National Natural Science Fund for Distinguished Young Scholars[51525903]
WOS研究方向	Construction & Building Technology ; Materials Science
WOS类目	Construction & Building Technology ; Materials Science, Composites
WOS记录号	WOS:000556826200013
出版者	ELSEVIER SCI LTD
引用统计	被引频次：28[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
版本	出版稿
条目标识符	http://ir.qdio.ac.cn/handle/337002/168115
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
作者单位	1.Hong Kong Polytech Univ, Dept Civil & Environm Engn, 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
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.

条目包含的文件
文件名称/大小	文献类型	版本类型	开放类型	使用许可
Mechanistic study on（3074KB）	期刊论文	作者接受稿	限制开放	CC BY-NC-SA	浏览