| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide a lightweight block excellent in water permeability, rich in strength and elasticity, and capable of easily and inexpensively configuring a closed conduit.SOLUTION: A block 1 configuring a closed conduit includes: a block body 2 which has a prismatic outer shape, which has openings 3a formed on at least two of side surfaces, respectively, and in which flaky resin pieces and rubber chips are mixed together and solidified with an adhesive so as to internally communicate the openings 3a with each other; and an impervious plate 4 that is provided on a bottom surface of the block body 2.</p> |
