Implementation of performance-based bridge deck protective systems.
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2013-06-01
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Abstract:When considering the durability of a bridge, the concrete deck is often the most vulnerable component and can be the limiting factor ; affecting service life. To enhance the durability of both new and existing bridge decks, a protective system is often provided to prevent ; or delay the ingress of chlorides and moisture to the reinforcing steel. In the state of Indiana, this protective system typically comes in ; the form of a concrete overlay or a thin polymer overlay. Another protective system widely used in the United States and in many ; countries internationally consists of a waterproofing membrane overlaid with asphaltic concrete. Due to a history of poor performance ; in the 1970’s and the 1980’s, a moratorium has been placed on the installation of waterproofing membranes in Indiana. This study ; reevaluates the state‐of‐the‐practice of bridge deck protection in Indiana with the goal of enhancing the Indiana Department of ; Transportation’s toolbox of bridge deck protective systems. Consideration was given to the state‐of‐the‐art and state‐of‐the‐practice in ; bridge deck protective systems used by other state transportation agencies as well as by international transportation agencies. ; Research focused on the practice of installing waterproofing membranes and the latest technologies being used. Based on the ; information gathered, various protective systems were evaluated, and recommendations are provided on the selection of the most ; appropriate systems for various bridge conditions. Furthermore, a recommendation is provided to remove the moratorium on ; membrane systems so that the benefits of this system can be more fully explored and realized.
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Main Document Checksum:urn:sha256:83f30a6f61846ecccd47214580fe76f662133413fe6610ccd7fa87d53815b59a