| abstract |
An object of the present invention is to provide a spray material that does not impair the aesthetic appearance after curing. A spraying material obtained by mixing an agent A containing cement, calcium aluminate, calcium sulfate, an agent B containing aluminum sulfate, and a rosin derivative. You may contain aggregate, water, organic acids, calcium hydroxide, and a fiber. The agent B may be an aluminum sulfate-containing liquid. Wet dry mortar containing water containing cement, calcium aluminate, calcium sulfate, aggregate, rosin derivative and water, and B agent containing aluminum sulfate are pumped separately and immediately before spraying. A spraying method in which agent A and agent B are mixed and sprayed. Discoloration prevention method and durability improvement method consisting of this spraying method. [Selection figure] None |