| 摘要 |
<p>This invention relates to a sheet extended on a sheathing board which is used while being fitted to the surface side of a sheathing board in a concrete mold. The present invention is mainly directed to discharge excessive water and bubbles from inside the concrete that is poured, and to improve heat-insulating and heat-retaining properties of the poured concrete and workability. The present invention is directed secondarily to form a corrugated pattern on the concrete surface simultaneously with pouring of concrete. In the sheet extended on a sheathing board in accordance with the present invention, a large number of drainage forming recesses are formed on the back of a foamed synthetic resin sheet layer having independent bubbles in such a manner as to communicate with each other in the surface direction of the sheet layer, and a large number of water passage holes communicating with the drainage forming recesses are open in the foamed synthetic resin sheet layer. Furthermore, the corrugation pattern is formed on the surface side of the foamed synthetic resin sheet layer of the sheet extended on the sheathing board having the construction described above.</p> |
