| abstract |
PROBLEM TO BE SOLVED: To use cement concrete to spray exposed ground surfaces in tunnels such as roads, railways, and conduits, which are excellent in initial strength development and can suppress alkali aggregate reaction. To provide an adhesive material and a spraying method using the same. SOLUTION: A quick setting agent containing an alkali metal-containing substance, a shirasu, a spray material containing cement concrete, and the quick setting agent containing calcium aluminate and / or gypsum. The material and the spraying method of spraying using the spraying material are configured. [Selection figure] None |