| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide an inexpensively-manufacturable underground buried box excellent in storability, transportability and constructibility. <P>SOLUTION: This underground buried box comprises a bottom panel 11L, a top panel 11U, and four side panels 11S. A composite panel material, which is constituted by mounting a lightweight cement plate 21A at least on the outer-surface side of a frame 20, is used as at least the four side panels 11S. The lightweight cement plate 21 is composed of a porous molded article which is obtained by filling the inside of a sealed mold for cement with a mixture obtained by mixing a foam formed by prefoaming cement, water, reinforcing fibers and a foaming agent, and curing and solidifying the mixture. In the molded article, the reinforcing fibers and the foams are contained in a dispersed state, and its specific gravity falls within the range of 0.5-1.0. <P>COPYRIGHT: (C)2009,JPO&INPIT</p> |
