| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a spraying material not degrading beauty appearance of the after hardening. <P>SOLUTION: The spraying material is constituted by mixing an A agent containing cement, calcium aluminate, calcium sulfate, a B agent containing aluminum sulfide, and a rosin derivative. The spraying material may contain aggregates, water, inorganic acids, calcium hydroxide, fibers. The B agent may be an aluminum containing liquid. In the spraying method, an wet mortar A agent constituted by mixing a dry mortar containing the cement, calcium aluminate, calcium sulfide, aggregates, rosin derivative, and water, and a B agent containing aluminum sulfide are separately compressedly delivered, and are sprayed while mixing the A agent and the B agent directly before spraying. The discoloring preventing method and the durability improving method comprising the spraying method are also disclosed. <P>COPYRIGHT: (C)2013,JPO&INPIT |
