United States Department of Transportation
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Abstract:Many Florida bridges are built of steel-reinforced concrete. Florida’s humid and marine
environments subject steel in these structures
to corrosion once water and salt penetrate the
concrete and contact the steel. Corroded steel
takes up more space than the original steel,
resulting in cracked and spalling concrete which
further exposes the steel, and requires expensive
repairs and corrosion control techniques.
The Florida Department of Transportation
(FDOT) has responded with corrosion prevention
practices, such as very low permeability concrete
and increased concrete cover thickness over
reinforcing steel. This increases initial cost but
saves money over time, since the bridge’s service
life is significantly extended. So, it is important
to understand how a specific design can increase
service life for the specific environment in which
the bridge will be built.
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