| 摘要 |
<p>PURPOSE:To prevent a water treatment material from floating in waste water treatment tanks, channels, and rivers by making the water treatment material which cleans up waste water by the function of living microorganisms by a method in which particles of porous light weight foamed concrete are bonded to each other with a bonding agent like sponge cake. CONSTITUTION:Aqueous slurry comprising a raw material for light weight foamed concrete consisting of a silicate raw material, cement, gypsum, etc., and a small amount of aluminum powder is cured partially to obtain an uncured product. The aqueous slurry of the uncured product is obtained by mixing 100 wt.pts. of the uncured product with about 30 wt.pts. of water. On the other hand, about 100 wt.pts. of particles obtained by pulvelizing ALC is mixed with 100 wt.pts. of the aqueous slurry to make a nonfluid product. A mold is packed with the nonfluid product, and a ring-shaped molded product is formed by pressurizing vertically to obtain a molded article 1 after steam curing. In this molded article 1, the particles are bonded to each other like sponge cake. The parts which are not bonded on the surface of the particles form spaces 4, making the prompt penetration of waste water possible.</p> |
