Hydrophilic Foams Files
In 1997, serious leaks developed at George Bush Intercontinental Airport in a long utility tunnel connecting a passenger terminal with the central plant.
Chemical grout has been stopping leaks in concrete structures for over 25 years. In concrete dams, chemical grout forms a permanent, flexible, compression-type seal that stops water movement.
At George Bush Intercontinental Airport (Houston, TX), the physical plant is connected to the passenger terminals by a tunnel. Cracks had developed in the ceiling of the tunnel, and by summer 1997, water was pouring into the tunnel and onto the pipes.