Rapid replacement of bridge deck expansion joints study - phase I.
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2014-12-01
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Abstract:Bridge deck expansion joints are used to allow for movement of the bridge deck due to thermal expansion, dynamics loading, and
other factors. More recently, expansion joints have also been utilized to prevent the passage of winter de-icing chemicals and
other corrosives applied to bridge decks from penetrating and damaging substructure components of the bridge. Expansion joints
are often one of the first components of a bridge deck to fail and repairing or replacing expansion joints are essential to extending
the life of any bridge.
In the Phase I study, the research team focused on the current means and methods of repairing and replacing bridge deck
expansion joints. Research team members visited with Iowa Department of Transportation (DOT) Bridge Crew Leaders to
document methods of maintaining and repairing bridge deck expansion joints. Active joint replacement projects around Iowa
were observed to document the means of replacing expansion joints that were beyond repair, as well as, to identify bottlenecks in
the construction process that could be modified to decrease the length of expansion joint replacement projects.
After maintenance and replacement strategies had been identified, a workshop was held at the Iowa State Institute for
Transportation to develop ideas to better maintain and replace expansion joints. Maintenance strategies were included in the
discussion as a way to extend the useful life of a joint, thus decreasing the number of joints replaced in a year and reducing the
traffic disruptions.
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