Shotcrete or Gunite

Concrete applied by spraying. Shotcrete is a mixture of portland cement, aggregate, and water conveyed by compressed air to a spray gun. For structural uses, shotcrete is usually sprayed over a framework of reinforcing bars and steel mesh. Because it can take any shape, is easily coloured (see below picture of "Beaucours Beach"), and can be sculpted after application, it is used for a variety of specialized structures, including artificial rock walls, zoo enclosures, canopies, shell structures, pools, and dams. It is sometimes used to bind the walls of tunnels.

Source: www.britannica.com

Nailed wall - Shotcreting - Martinique (French Overseas Department)	Nailed wall - Shotcreting - Le Meynard - Martinique (French Overseas Department)	Sprayed concrete - Saint Chef (South East of France)	Shotcreting from a trailed platform
Railway - Neufchateau (North East of France)	Shotcreting from a trailed platform - Oran, Algeria	Coloured guniting - Beaucours beach- Sanary sur mer (French Mediterranean coast)	Coloured guniting - Beaucours beach- Sanary sur mer (French Mediterranean coast)
Castle "Manuel de Locatel" - Conflans (French Alps)	Shotcreting in a tunnel - Laval Pradel (South East of France)	Guniting - Waste reception centre (South East of France)