shotcrete
n.β Β«A seldom-used method called “shotcrete” uses air compressors, hooked to a giant nozzle, to blow concrete onto the poolβs shell. The result is a more uniform surface that requires very little lumber for framing.Β» ββPool sprayed at Stoney Creek” by Barb Ickes Quad-City Times (Davenport, Iowa) Aug. 24, 2005. (source: Double-Tongued Dictionary)