Synthesis of DOT Use of Beam End Protection for Extending the Life of Bridges

다국어 초록 (Multilingual Abstract)

As the national transportation infrastructure ages and deteriorates, many existing bridges require frequent and costlymaintenance and repairs. The objective of this work was to synthesize new and existing types of beam end coatings and treatmentsthat have been proven to extend the life of new and existing concrete and steel bridge beams. A comprehensive literature review,along with online surveys and phone interviews of State department of transportations (DOTs) and coating manufacturers wasconducted to gather information about existing and recently developed technologies. The study revealed that while manypromising coatings and treatments are offered on the market, there is a lack of readily available laboratory results that would enabledirect comparison of the available methods. This finding applies in terms of the coatings’ durability and the potential for extendingthe service life of existing bridges. Most of the interviewed State DOTs’ personnel assessed the products listed in respective DOT’sQualified Products Lists as performing ‘well’. However, there was significant variability between states in the type of the productsused. Among the agencies contacted, none was able to suggest the most promising or advanced products, either for concrete orsteel bridge beam end treatments. This suggests that comprehensive laboratory evaluation would be necessary for selecting the bestavailable beam end treatments and coatings.

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