Corrosion Paper-Blended .pdf (464.97 kB)
Chloride-induced reinforcement corrosion in blended cement concretes expores to chloride-sulfate environments
journal contribution
posted on 2008-11-25, 16:59 authored by Hamoud A.F. Dehwah, Simon A. Austin, M. MaslehuddinThis paper reports the results of a study conducted to investigate the influence of sulphate concentration and
associated cation type on chloride-induced reinforcement corrosion in blended cement concretes. Reinforced concrete
specimens were exposed to chloride plus sulphate solutions for a period of 1200 days. The exposure solutions
contained a fixed concentration of 5% sodium chloride and the sulphate concentration was varied from 0 to 4%
SO4
2 . The effect of cation type associated with sulphate ions, namely Naþ and Mgþþ, on chloride-induced
reinforcement corrosion was also evaluated. Reinforcement corrosion was assessed by measuring corrosion potentials
and corrosion current density at regular intervals. The results indicated that the presence of sulphate ions in
the chloride solution increased the corrosion current density, but no significant effect on the time to initiation of
reinforcement corrosion was noted. Further, the corrosion current density increased with increasing sulphate
concentration and the period of exposure. The corrosion current density on steel in the blended cement concrete
specimens was much less than that in the plain cement concrete specimens, indicating that the corrosion resistance
of blended cements was much better than that of plain cements. The cation type associated with sulphate ions did
not significantly influence either the initiation or rate of reinforcement corrosion.
History
School
- Architecture, Building and Civil Engineering
Citation
DEWAH. H. A. F., AUSTIN, S. A. and MASLEHUDDIN, M., 2002. Chloride-induced reinforcement corrosion in blended cement concretes expores to chloride-sulfate environments. Magazine of concrete research, 54 (5), pp. 355-364Publisher
© Thomas TelfordVersion
- NA (Not Applicable or Unknown)
Publication date
2002Notes
This is a journal article. It was published in the journal, Magazine of concrete research [© Thomas Telford] and the publisher website is available at: http://www.thomastelford.com/journals/ISSN
0024-9831Language
- en