Beams are installed at site
High performance adhesive bonding is applied to beam surface
Prefabricated SuperdeckTM is installed using minimal equipment
On-site assembly takes only a few hours
The Need
The bridge infrastructure of the United States is in constant need of repair and rehabilitation. It is reported that 43% of the bridges in the USA have been identified as being structurally deficient or functionally obsolete due to corrosion. Corrosion is a major problem specially when deicing has to be done. The repair of concrete and timber bridge decks is a time consuming and costly exercise. Bridge repairs also causes safety hazards and traffic delays. The need for a cost effective and efficient method for replacing and repairing bridges cannot be overemphasized.
The Technology
SuperdeckTM, a non-corrosive fiber reinforced polymer (FRP) composite bridge deck. The Deck is designed and engineered into a lightweight, strong and rigid structure that will not corrode. The deck sections, composed of hexagon and double-trapezoid profiles, are bonded with a high-strength adhesive under controlled conditions in the manufacturing plant.
The H-deck components are placed transversely to the traffic direction and supported by longitudinal steel or composite beams. Beams can be spaced up to nine feet apart.
The Benefits
- It can replace deteriorated concrete or timber bridge deck.
- Cost effective on an installed cost basis.
- Field assembly of deck modules takes only hours to complete.
- Safety is enhanced as minimal equipment and formwork is needed, and long traffic delays are eliminated.
- Good fatigue resistance and high strength-to-weight ratios yield high durability.
- Corrosion-resistant and maintenance free material eliminates the number of future replacements.
- Contains zero metal reinforcements eliminating corrosion due to deicing materials.
- Complies with the American Association of State Highway & Transportation Officials (AASHTO) HS 25 Highway Bridge Design.
Status
This technology was honored as one of 1999 Nova Award Finalists by Construction It won the Industry Recognition Awards as finalist, the CERF Charles Pankow Award for Innovation in 1997, and the Market Viability Award from the Composite Fabricators Association in 1997.
It has being installed in many locations: County Road 26/6, Lewis County, Virginia; The Ohio to Erie trail, Xenia, Ohio; County Road 26, Taylor County, West Virginia; Route 4003, off Route 31, Somerset County, Pennsylvania.
SuperdeckTM is currently undergoing a Highway Innovative Technology Evaluation Center (HITEC) product evaluation. HITEC is Civil Engineering Research Foundation (CERF)'s service center and clearinghouse for implementing highway innovation.
Barriers
There are no long-term studies on the performance of the bridge since it is a new construction material and technology.
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