Jin, Zuquan;
Zhao, Xia;
Du, Yujiao;
Yang, Siyu;
Wang, Danqian;
Zhao, Tiejun;
Bai, Yun;
(2022)
Comprehensive properties of passive film formed in simulated pore solution of alkali-activated concrete.
Construction and Building Materials
, 319
, Article 126142. 10.1016/j.conbuildmat.2021.126142.
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Abstract
The study on the properties of passive films in alkali-activated slag cement can provide a theoretical basis for the development and application of low-carbon and environmental friendly concrete materials. In this paper, the passivation behaviour of anti-corrosion rebar (AR) and normal reinforcing steel (NR) in sulfur-free simulated pore solutions of alkali-activated slag cement pastes was investigated using electrochemical, microscale techniques and molecular dynamics modelling. Results showed that the formation time, composition and thickness of the passive film were affected by the types of simulated pore solutions. Molecular dynamics further elucidated the reason for difference in the protective ability of passive film in three types of simulated pore solutions. The results of protection capability of two kinds of rebar obtained from molecular dynamics were consistent with those of electrochemical impedance spectroscopy (EIS).
| Type: | Article |
|---|---|
| Title: | Comprehensive properties of passive film formed in simulated pore solution of alkali-activated concrete |
| Open access status: | An open access version is available from UCL Discovery |
| DOI: | 10.1016/j.conbuildmat.2021.126142 |
| Publisher version: | https://doi.org/10.1016/j.conbuildmat.2021.126142 |
| Language: | English |
| Additional information: | This version is the author accepted manuscript. For information on re-use, please refer to the publisher’s terms and conditions. |
| Keywords: | Passivation, Steel bar, Alkali-activated, Protective ability, Molecular dynamics |
| UCL classification: | UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science > Dept of Civil, Environ and Geomatic Eng UCL > Provost and Vice Provost Offices > UCL BEAMS UCL |
| URI: | https://discovery.ucl.ac.uk/id/eprint/10143547 |
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