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International Journal of Corrosion
Volume 2014 (2014), Article ID 564163, 11 pages
http://dx.doi.org/10.1155/2014/564163
Research Article

Corrosion of Steel in High-Strength Self-Compacting Concrete Exposed to Saline Environment

1Building and Construction Engineering Department, University of Technology, Alsinaa Street, 12906 Baghdad, Iraq
2Building Research Center, Royal Scientific Society (RSS), Al-Jubaiha, Amman 11941, Jordan
3Scientific Research Center, Applied Science Sector, Royal Scientific Society, Al-Jubaiha, Amman 11941, Jordan
4Conformity and Quality Institutional Company, Abdul Hameed Badees Street 45, Shmeisani, Amman 11121, Jordan

Received 9 January 2014; Accepted 6 April 2014; Published 23 April 2014

Academic Editor: Flavio Deflorian

Copyright © 2014 Hana A. Yousif et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

A research work was carried out to investigate the effectiveness of high-strength self-compacting concrete (SF-R) in controlling corrosion of embedded steel. Reinforced concrete cylinders and plain cubes were subjected to 5% NaCl solution. Slump flow, J-ring, V-funnel, compressive strength, electrical resistance, and electrochemical tests were conducted. Corrosion resisting characteristics of steel were examined by monitoring corrosion potential, polarization resistance, corrosion currents, and Tafel plots. The relationship between corrosion current density and corrosion potential was established. Results were compared with characteristics of a grade 40 MPa reference concrete (R) and grade 70 MPa conventional self-compacting concrete (SP). Results indicated that at 270 days of exposure, the corrosion currents for steel in SF-R were 63- and 16-fold lower compared to those of steel in R and SP concretes, respectively. This concrete showed a considerable increase in electrical resistance and compressive strength of 96 MPa at 28 days of exposure. Relying on corrosion risk classification based on corrosion current densities and corrosion potentials, the steel in SF-R concrete is definitely in the passive condition. The splendid durability performance of steel in SF-R concrete linked to adorable self-compacting features could furnish numerous opportunities for future structural applications in severe environmental conditions.