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Author(s): A.-K. M. Hussain & A. M. Rifai
Abstract:
The corrosion of reinforcing steel has led to the premature deterioration of many
concrete bridges in countries throughout the World, such as Libya, before their
design life is attained.
This has placed tremendous financial burden on such
countries and local transportation organizations in their attempts to halt ongoing
reinforcing steel corrosion in the existing structures that are still functional and
to replace those structures that have already deteriorated to the point that it does
not make any economic sense to keep on maintaining them.
In addition, badly
deteriorated bridges have considerable adverse effects on the nation’s economic
output and also place the safety of motorists at risk.
In this study the effects of
several factors on the corrosion behavior of steel have been studied.
These
factors are chloride ion concentrations and environmental variables such as
temperature and relative humidity.
The interactions of chloride ion
concentration, temperature, and relative humidity on the corrosion behavior of
steel are complex.
In addition, the effect of the concrete mix components, such
as water/cement ratio and proper selection of cement type, mineral admixture,
and fine aggregate, coarse aggregate, and air content on the corrosion rate of
reinforcing steel are studied.
Keywords:
reinforcing steel corrosion, reinforced concrete bridges, corrosive
environment, corrosion of reinforcing steel, corrosion of steel reinforcement in
concrete.
1 Introduction:
Reinforcing steel bars are placed in regions of low tension in concrete bridges.
Concrete has a tendency to crack eventually if proper curing is not observed.
The resistance of mild steel bars to corrosion can not be significantly improved
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Pages: 9
Size: 419 kb
Paper DOI: 10.2495/ECOR070281
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