Title: Concrete bridge protection and rehabilitation: chemical and physical techniques
Abstract: The report is based on a review of the literature; the responses to questionnaires sent to state Departments of Transportation, Canadian provinces, selected turnpike and thruway authorities, technology transfer centers, and material suppliers; and the evaluation of 50 bridge decks located in 7 states. The report compares polymer overlays, sealers, high- early-strength hydraulic cement concrete overlays, and patches from the standpoint of performance characteristics and service life. The report shows that multiple-layer epoxy and epoxy-urethane and premixed polyester overlays should have a useful life of 10 to 25 years when applied as protection or rehabilitation treatments; sealers can reduce the infiltration of chloride ions for 5 to 10 years; high-early-strength hydraulic cement concrete overlays have tremendous potential, but considerable developmental work is needed; and patching repair treatments correct spalls but do nothing to retard chloride-induced deterioration. The report also indicates that, when necessary to minimize traffic congestion, most of these treatments can be used with lane closures of less than or equal to 8 hours. Finally, the report suggests that rapid deck treatments with a reasonable service life can be obtained with short lane closure times; however, the use of longer lane closures would allow for more careful construction and more complete cure of materials.
Publication Year: 1993
Publication Date: 1993-06-01
Language: en
Type: article
Access and Citation
Cited By Count: 34
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