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The deck rehabilitation of Poplar Street Bridge complex, in
St. Louis, Missouri, comprising eleven interconnected entry
and
exit ramps, is the largest project of its type ever
undertaken. With a surface area of more than 850,000 square
feet (79,000 square meters), the complex is the principal
access into the city of St. Louis from Interstates 55,
66, and
70,
strategic east-west links across the Mississippi River
carrying 150,000 vehicles daily.
With significant surface deterioration of the part concrete,
part 2 in. (50 mm) asphalt overlay to the 30-year-old bridge
decks, due to the freeze thaw and heavy use of deicing salt,
the Missouri Department of Transportation required the project
to be completed at night, with no holiday working and no
permanent lane drops.
With potholes increasingly appearing in the concrete surfaces
and the asphalt overlay starting to break up, the Missouri DOT
specified a 1/4 in. (6 mm) epoxy broadcast overlay system
following repair to the concrete deck surfaces. The
epoxy/aggregate overlay was to be applied in two applications
within the twelve hour work period.
Completed within the 90-day contract period, this unique
project is a testimony to innovation and cooperation within
the construction industry to achieve a successful
project—the largest of its kind to date internationally.
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