| abstract |
(57) [Problem] To provide a spraying material and a spraying method, which have good initial and long-term strength development and generate less dust. SOLUTION: The spray material comprises a cement mortar mainly composed of cement and gypsum, a powder quick-setting agent and a quick-setting agent slurry mainly composed of water. The quick-setting slurry is mixed with the cement mortar before the merging point to mix the quick-setting slurry and compressed air to pneumatically feed the quick-setting slurry, and then to the pneumatically-set quick-setting slurry. And a cement mortar. |