Dublin Ohio Pedestrian Bridge
Slag Cement: Skyway Cement
Award: Green Design
This pedestrian only suspension bridge with a reverse curve alignment includes four piers and a 178 ft (54 m) tall pylon. This project is a signature project for the city of Dublin, OH, and has unique geometric qualities associated with all exposed concrete of the over 700 ft (200 m) long bridge. A pedestrian bridge linking the east and west sides of the Scioto River has been envisioned since the last community plan was adopted in 2007 and is part of a $120-million initiative through public and private investments to revitalize downtown Dublin over the next few years.
The structural steel is a triangular box section that supports a 14 ft (4 m) wide deck. The pylon is the main feature of the bridge and rises more than 100 ft (30 m) above the bridge deck. The bridge deck passes through the center of the pylon adding to the unique look of the structure. Due to the geometry and density of the reinforcing bar in the pylon, a 6000 psi (41 MPa) consolidating mixture was used for the entire pylon, and had to be usable as a mass concrete mixture. The rest of the piers consisted of 4000 psi (28 MPa) concrete. All exposed concrete was required to have a lighter than typical appearance as part of the aesthetic design of the bridge.
Slag cement was used in every mixture on the project to meet permeability requirements, reduce early heat of hydration, and for its aesthetically pleasing effects on concrete. The mass concrete mixture was a 6000 psi self-consolidating mixture comprised of 730 lb (330 kg) cementitious material, with 65% slag cement. The mass concrete almost always made full strength in 7 days and never later than 28 days. Concrete flow tests averaged a 26 in. (660 mm) flow and a viscosity modifier was used for mixture stability.
- Owner: City of Dublin, Ohio
- Contractor: Kokosing Construction Company
- Architect: Endie Studio
- Engineer: T.Y. Lin International
- Concrete: Anderson Concrete
- Slag Cement: Skyway Cement Company