What are the issues at stake in this project?
Mr. Otake: By the end of 2010, Haneda will boast a new take-off and landing runway, emerging out of the sea. The pier will stretch out over a massive 520,000 sq m area over the sea, and will feature two structures: an underwater part, consisting of steel pillars and their coatings, going down to a depth of 70 meters, and a concrete area of 192,000 sq m secured onto steel girders.
The key issues specified by the engineers for this project are durability, strength and low maintenance costs. Ductal® was selected for its salt resistance of 1/100 instead of 1/500 for ordinary concrete and a very high permeability coefficient, far exceeding the values for ordinary concrete. The cement company Taiheiyo undertook to supply the airport construction site with Ductal® at an extremely high pace.