| abstract |
(57) [Summary] (Modified) [Problem] To provide a quick setting agent and a spraying material capable of reducing a rebound rate when spraying quick setting cement concrete. SOLUTION: A quick setting agent containing calcium aluminates, aluminum sulfate, and alkali metal sulfate. A spray material obtained by mixing cement concrete and the quick setting agent. And a method of spraying, wherein the quick-setting agent is pumped by pressurized air and mixed and mixed with cement concrete. |