51312-01131-FIELD EXPERIENCES IN CORROSION DIAGNOSIS AND REMEDIATION SOLUTIONS FOR BRIDGE INFRASTRUCTURE OF MÉXI

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Product Number: 51312-01131-SG

ISBN: 01131 2012 CP

Author: Rafael Soto-Espitia

Publication Date: 2012

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The research initiative to be described relates to the concern of the current Mexican transportation agencies on infrastructure integrity particularly in the sector of highway bridges. We report analytical and field work of corrosion diagnosis solution development and monitoring of a set of bridges representative of past and emerging construction technologies under the scope to corrosion engineering in tropical environments. We consider three reinforced concrete bridges two of which are cable stay systems. Diagnosis procedures were applied on piles as well as other structural components involving field visual inspections as well as concrete resistivity impact strength and reinforcing steel – concrete electrolyte half cell potentials. Age and sea coast proximity were two important factors affecting the reinforced concrete integrity. The oldest bridge over seawater exhibited a significant need of attention and repair. A CP system was installed including a remote monitoring system to survey rebar concrete potential performance and to exhibit CP solution effectiveness. A cable stay bridge near the coast of Gulf of Mexico exhibited in the diagnosis some deleterious corrosion effects of reinforcing bars in the visual inspection as well as the half cell potentials concrete resistivity and impact strength. Keywords: Infrastructure bridges corrosion electrochemical field monitoring concrete steel cathodic protection