Development and Evaluation of Filling Material for Expansion Gap Used Polybutadiene Foam

Abstract

This paper presents development and the result of evaluation of filling material used polybutadiene foam in a waterproof structure at girder end.
The polybutadiene foam used for the waterproof structure is excellent in water resisting property, flexibility, concrete adhesion, weatherability, and durability. Moreover, it was confirmed that the forming object has a difference in water resisting property in the up-and-down portion of the object. Therefore, when the number of lamination of the foaming object was increased, it proved that water resisting property improves.
By installing the waterproof structure of having such characteristic features in the expansion gap of the road bridge, it becomes possible to attain reduction of traffic restriction, and reduction of maintenance expense.