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This paper describes the results of a research study to determine the effectiveness of various rehabilitation materials and techniques for concrete bridges. This work reflects the needs for identifying effective materials and techniques to offer protection against corrosion of steel in concrete as well as patch repair in concrete girders.
This paper describes the results of a research study to determine the effectiveness of various rehabilitation materials and techniques for concrete bridges. This work reflects the needs for identifying effective materials and techniques to offer protection against corrosion of steel in concrete as well as patch repair in concrete girders. The study was sponsored by the Wisconsin Highway Research Program (WHRP) of the Wisconsin Department of Transportation. As a part of this study, all surfaces near the ends of five new prestressed concrete I-girders were treated with various coating materials and the girders were subjected to cyclic exposures of a sodium chloride solution and a galvanostatic accelerated corrosion test for a period of 18 months. The coating or treatment materials used in the study included a polymer resin coating, an epoxy coating, a solvent based silane penetrating sealer, a microsilica and latex modified patch material, a water base epoxy and cementitious patch material, and a fiber reinforced polymer material. The experimental program determined the effectiveness of the materials and techniques used for protection against corrosion. Through new specification requirements, the Wisconsin Department of Transportation will implement the results of this study in the construction of new prestressed concrete bridges to achieve better protection against corrosion of prestressing steel at the ends of prestressed I-girders.
This paper will focus on the application of polymeric coatings and linings, which include, but are not limited to, polyamine and novolac epoxies and vinyl esters. These materials are delivered to the job site in buckets or bags and are mixed and applied on-site, and it is the responsibility of the owner, engineer and material supplier to determine the type of material and coating system to specify for any particular project.
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Financial resources for maintenance of coatings systems for owners of steel bridges are at a premium. Therefore, it is imperative to prioritize and choose the scope of services for maintenance painting of these structures in the most efficient manner. This paper will present the fundamental steps necessary for a detailed condition assessment of the existing coatings of steel bridges.
The drive to embellish and beautify our surroundings is a human motivation that bridges both culture and time. From vases to vaulted ceilings, across the globe we captivate ourselves with ornament, decorating the objects that we create, the homes we live in and the spaces in which we work and worship. Examples of decorative painting can be found from the earliest moments of man’s existence and have evolved throughout history in synchronicity with our life styles; expressing our tastes, our status, our standards and values.