16-YEARS STUDY REPORT ON CONSTRUCTION AND PERFORMANCE EVALUATION OF PRESTRESSED CONCRETE BRIDGE WITH HIGH DURABILITY TO SALT DAMAGE

Abstract

 Yakabi Bridge was the first highly durable PC road bridge in Japan constructed for minimum maintenance (corrosion protection by multiple means), through the use of concrete containing ground granulated blast furnace slag #6000, prestressing steel strand with individually coated wires, epoxy resin coated reinforcing bar, plastic duct for the ducts, waterproof construction on the bridge surface, aluminum parapet rail for the parapets, and rubber bearing for the bearings. This paper summarizes the results of the research activities carried out through academic-industrial-government cooperation into the construction of a PC structure with high durability against salt damage over a period of 16 years that included a program of follow-up tests on the actual bridge and additional tests on exposed test specimens in order to verify the effect of these measures against salt damage. The analysis verified that construction method of high durability PC road bridge using these materials was very effective as a measure against salt attack.