| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To allow removal of a surface layer of concrete placed without using water to facilitate washout finish and permit indoor application. <P>SOLUTION: A consolidating agent paste is obtained by adding a polyvinyl alcohol as a setting retarder, anhydrous gypsum as a hardening accelerator, silica sand as a fine aggregate, and water to aluminous cement and then kneading a resulting mixture. The paste is mixed with gravel, and a resulting mixture is applied to a concrete surface to form a decorative surface layer. When the inside is solidified and the surface looks dry after about 1 hour, the surface is brushed with a wire brush to scrape the surface layer to expose the gravel to the surface. A powder formed from the scraped surface layer is cleaned with a wet sponge. Since the inside is solidified, the gravel does not move and is exposed from the surface by approximately 2-3 mm, thus obtaining a decorative surface with the gravel. <P>COPYRIGHT: (C)2007,JPO&INPIT</p> |
