Reliability Assessment of Bridge Decks: A Case Study of Three Bridges Along Lagos – Ibadan Expressway.
Date
2012
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Abstract
The ageing and gradual deterioration of bridges in Nigeria needs
balancing of cost-effective plans for bridge maintenance,
rehabilitation and replacement. This research aims at assessing the
reliability of bridges using three existing highway bridges along
Lagos-Ibadan expressway as a case study. Visual inspection,
sounding, half-cell potential and chloride concentration tests were
utilized to evaluate the conditions of the bridges. Deteriorations
were observed on the decks’ surfaces. The level of corrosion on one
deck was active and uncertain in the remaining two. The chloride
concentrations on all the decks were within AASHTO standards and
only one of the decks had delaminated. The results revealed that
none of the decks needs total replacement but all require some form
of rehabilitation.