| abstract |
(57) [Problem] To provide a spraying material and a spraying method which have improved initial strength and long-term strength, and are excellent in impact resistance and elasticity. SOLUTION: A cement admixture containing gypsum, a quick setting agent mainly composed of calcium aluminate, and a fibrous substance. Furthermore, a spraying material to which cement and cement mortar mainly composed of gypsum are added. If necessary, one or more admixtures selected from the group consisting of alkali aluminates and / or alkali carbonates, water reducing agents, setting retarders, setting accelerators, and ultrafine powders are used as spraying materials. It may be added. |