IOCAS-IR  > 海洋环境腐蚀与与生物污损重点实验室
Mechanistic study on initial passivation and surface chemistry of steel bars in nano-silica cement pastes
Zheng, Haibing1; Poon, Chi Sun1; Li, Weihua2,3
2020-09-01
Source PublicationCEMENT & CONCRETE COMPOSITES
ISSN0958-9465
Volume112Pages:14
AbstractThis 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.
KeywordConcrete Steel bar Passivation Corrosion Nano-silica
DOI10.1016/j.cemconcomp.2020.103661
Indexed BySCI
Language英语
Funding ProjectHong Kong Branch of the National Engineering Research Center for Steel Construction ; National Natural Science Fund for Distinguished Young Scholars[51525903]
WOS Research AreaConstruction & Building Technology ; Materials Science
WOS SubjectConstruction & Building Technology ; Materials Science, Composites
WOS IDWOS:000556826200013
PublisherELSEVIER SCI LTD
Citation statistics
Cited Times:1[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Version出版稿
Identifierhttp://ir.qdio.ac.cn/handle/337002/168115
Collection海洋环境腐蚀与与生物污损重点实验室
Corresponding AuthorPoon, Chi Sun
Affiliation1.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
Recommended Citation
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.
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