Performance of Concrete Bridge Deck Overlays, HR-501, 1990

(1990) Performance of Concrete Bridge Deck Overlays, HR-501, 1990. Transportation, Department of

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Abstract

Chloride-ions penetrating into bridge decks and corroding the steel have been a major problem. As the steel corrodes it exerts stresses on the surrounding concrete. When the stresses exceed the strength of the concrete, cracks or delaminations occur. This, of course, causes deterioration and spalling of bridge deck surfaces. Both the Latex and Iowa Method were used to repair bridge decks for this project. The concrete was removed down to the steel and replaced with approximately 1 1/2 inches of low slump or latex modified concrete. The removal of unsound concrete below the top layer of steel was sometimes necessary. The objective of this project was to determine if the bridge overlays would provide a cost effective method of rehabilitation. To do this, unsound and delaminated concrete was removed and replaced by an overlay of low slump or latex modified concrete.

Item Type: Departmental Report
Keywords: Bridge decks, Corrosion protection, Cost effectiveness, Delamination, Epoxy coatings, Ions, Latex modified concrete, Spalling, Structural analysis
Subjects: Transportation
Transportation > Bridges and tunnels
Transportation > Roads and highways
Transportation > Research
Transportation > Maintenance and preservation
ID Code: 17340
Deposited By: Iowa DOT Library
Deposited On: 03 Jul 2014 11:32
Last Modified: 05 Feb 2015 19:53
URI: http://publications.iowa.gov/id/eprint/17340