"Application of High Slag and Fly Ash, Low-Heat Cement to Antiwashout Underwater Concrete"

Abstract

In the construction of the Akashi Kaikyo Bridge (world's longest suspension bridge) in Japan, a total volume of about 500,000 cu m of antiwashout underwater concrete has been placed, and about 180,000 cu m of ordinary reinforced concrete are currently being placed. For this antiwashout underwater concrete, it was necessary to choose a low-heat, high-flowability concrete. The cement used was a 3-component type containing about 80% granulated blast furnace slag and fly ash. This report describes the physical properties and workability of the antiwashout underwater concrete, and the results of construction.