IOCAS-IR  > 海洋环境腐蚀与与生物污损重点实验室
Enhanced passivation of galvanized steel bars in nano-silica modified cement mortars
Zheng, Haibing1; Dai, Jian-Guo1; Hou, Lei1; Meng, Guozhe2; Poon, Chi Sun1; Li, Weihua2,3
2020-08-01
Source PublicationCEMENT & CONCRETE COMPOSITES
ISSN0958-9465
Volume111Pages:13
Corresponding AuthorPoon, Chi Sun(cecspoon@polyu.edu.hk) ; Li, Weihua(liweihua3@mail.sysu.edu.cn)
AbstractThis 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.
KeywordNano-silica Galvanized steel bars Passivation Concrete Corrosion
DOI10.1016/j.cemconcomp.2020.103626
Indexed BySCI
Language英语
Funding ProjectHong 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 AreaConstruction & Building Technology ; Materials Science
WOS SubjectConstruction & Building Technology ; Materials Science, Composites
WOS IDWOS:000540217400015
PublisherELSEVIER SCI LTD
Citation statistics
Cited Times:3[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://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 AuthorPoon, Chi Sun; Li, Weihua
Affiliation1.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 AffilicationInstitute 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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