Title:
High-Performance Concrete in the Confederation Bridge
Author(s):
Laszlo Dunaszegi
Publication:
Concrete International
Volume:
20
Issue:
4
Appears on pages(s):
66-68
Keywords:
bridges; compressive strength; high-performance concrete; structural design
DOI:
Date:
4/1/1998
Abstract:
An all-weather, low maintenance roadway with a service life of 100 years were among the design stipulations for a span that would link Prince Edward Island with New Brunswick in Canada's Gulf of St. Lawrence. Typical concrete strengths for the 13 km span were 55 MPa at 28 days and 60 MPa at 91 days. In order to achieve overall economical design, optimized sections had to be used. A high-performance concrete in combination with significant cover was decided upon to protect against corrosion of the embedded reinforcing and post-tensioning steels. The span, designed and build by a private joint venture firm that will maintain and operate it for 35 years, was opened to traffic in the summer of 1997.