NTL-HIGHWAY/ROAD TRANSPORTATION-Bridges and Structures;NTL-HIGHWAY/ROAD TRANSPORTATION-Construction and Maintenance;
Abstract:
The deterioration of various reinforced concrete bridge components containing conventional black steel reinforcement is the most important problem facing U.S. highway agencies. A major cause of this concrete deterioration (cracking, delamination, and spalling) is the corrosion of the embedded steel reinforcement, initiated by chloride ions from deicing salts and saltwater spray that have penetrated the concrete cover. In response to this situation, the Federal Highway Administration (FHWA) initiated this research project directed at the quantitative identification of the corrosive conditions fostering concrete bridge deterioration and at the identification of concrete materials that consistently provide superior performance when used for bridge deck overlays and for the repair of other concrete bridge members. It was also envisioned that this work would lead to the identification of concretes that are cost-effective for the construction of new bridge members.
Adjacent prestressed member girder bridges are economical systems for short spans and generally come in two types: adjacent box beam bridges and adjac...
Eleven systems containing epoxy-coated reinforcement (ECR) in combination with another corrosion-protection system are evaluated using the rapid macro...
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United States Department of Transportation
[PDF-62.86 KB]
