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CASE STUDY

HydraTech Field Services

Bridge Concrete Column Repair

Market
DOT

Challenge
Existing bridge concrete columns had been spalling and deterioration had raised concerns of weakened areas. The columns required repair and needed to be confined so the bridge would remain supported by them. The work had to completed quickly as the closure time needed to be short for the road below the interstate.

Engineered Solution
To provide a cost-effective and long-term repair, carbon fiber was specified to be used and columns required patching with concrete to stop future spalling. A top coat would be applied for aesthetic and protective reasons.

Scope
The columns were pressure washed, and then scaffolding was erected. The fiber was wet out and applied around the columns to produce a confining strength that would prevent the structure from failing in the future. Once the carbon fiber was cured a cementitious topcoat was applied. In under 2 weeks, 700 square feet of fiber wrap was applied.

Solution

The carbon fiber solution was quick and saved money by repairing damaged columns rather than replacing them. It was all completed in a timely manner so that the bridge was open before memorial day. The repair will prevent the need for future maintenance of deteriorated and spalling concrete. The topcoat applied to the columns made them uniform with the other columns that did not require repairs.

carbon fiber wrapping a spalling column
carbon fiber wrapping two spalling columns
Columns wrapped in carbon fiber wrap for extra strength
Columns wrapped in carbon fiber wrap for extra strength

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