| 摘要 |
<p>PROBLEM TO BE SOLVED: To reduce the disposal and amount of wastes, economize fuel, accelerate the permeation of rain water into the ground, increase the beauty as a landscape material, be kind to environment and to make it possible to be useful for environmental maintenance. SOLUTION: Wastes of semi-porcelain qualitative material less than 5% of water absorption, porcelain qualitative material and stone tool qualitative material, etc., are crushed, aggregate having up to 10 mm as the maximum particle size with 30-70 wt.%, secondly, fine sand of silica sand derived in the case gairome clay is finely elutriated is used as main ingredient, waste (mica material) containing a small amount of feldspar, mica, iron oxide, clay component, etc., with 5-25 wt.%, thirdly, a low melting point material such as enamel flitter, glass dust, etc., less than softening point 850 deg.C used as fine powder less than 0.1 mm with 10-30 wt.% and proper organic or inorganic binder are added to the main ingredient, if necessary, and they are mixed, molded and burnt at 700-900 deg.C. Ceramic industry product waste with 500 mm in thickness over 150 kg/cm<2> of compressive strength having such characteristics as natural transmissibility is over 35 mm/hour per unit area is used for main material.</p> |
