The Pinellas Bayway Bridge provides a 65 ft (20 m) clearance bridge structure that replaces a 50-year-old, two lane drawbridge with a new four-lane fixed-span bridge that accommodates an increased flow of traffic. The new Pinellas Bayway not only makes travel from St. Petersburg, FL, to St. Petersburg Beach easier by car but it includes a 12 ft (3.5 m) wide pedestrian walkway separated from traffic by a barrier wall. This aspect of the bridge was celebrated as part of the grand opening ceremonies in October 2014 with a “Bayway Bridge Bash” that culminated in a sunset 5K run/walk on the multi-use trail.
Slag cement was used in concrete mixtures for footings, columns, decks, and barrier walls. A mixture of 50% slag cement and portland cement provided reduced permeability and increased durability as required by the Florida DOT for this saltwater marine exposure, and met the specified 5500 psi (38 MPa) compressive strength requirement. Slag cement provided consistent concrete performance and a lighter colored concrete.
Project credits: Florida DOT, Owner; URS Corporation Southern, Engineer; Orion Marine Group, Inc., Contractor; Argos Concrete, Concrete; and Argos Cement USA, Slag Cement.