| 摘要 |
PROBLEM TO BE SOLVED: To provide a spraying material excellent in initial strength, long term strength and long term preservable property and low in rebound rate and to provide a spray method. SOLUTION: This spraying material is prepared by mixing a cement mortal consisting essentially of cement and gypsum with an accelerating agent consisting essentially of calcium aluminate, and the cement mortal is a general term of paste, mortal and concrete. An alkali aluminate or an alkali carbonate can be further added to the accelerating agent and an admixture such as a high performance water reducing agent, a setting retarder, a setting accelerator and ultrafine powder can be added to the spraying material. |
