shotcrete

plural shotcretes

1. countableuncountableconcrete conveyed through a hose and pneumatically projected at high velocity onto a surface.

   After each blast, rubble is taken out, and the excavated area is covered in a waterproof membrane and sprayed with shotcrete.

   2026 June 3, 17:57 from the start, in Norway is Building The World's Deepest Mega-Tunnel, spoken by Fred Mills, The B1M, via YouTube

   1 more example

   Shotcrete is here used as a brief descriptive term (not copyrighted) for a material consisting of portland cement, sand and water placed pneumatically by means of a machine that discharges water an pre-mixed cement and sand, under regulated pressures, through pipes or hose, and a discharge nozzle, the water being combined with the cement and san at the nozzle

   [1934, T. L. Condron; G. E. Boyd; Kenerly Bryan, Jr.; W. K. Hatt; A. C. Irwin; D. A. Ruhl; G. E. Tebbetts; H. H. Temple; L. W. Walter, “Pneumatically Projected Concrete”, in Proceedings of the Thirty-Fifth Annual Convention of the American Railway Engineering Association Held at the Palmer House, Chicago, Illinois March 13 and 14, 1934, volume 35, Chicago: American Railway Engineering Association