| 摘要 |
<p>PURPOSE: To obtain a soil conditioner mixture which is useful as a multipurpose surface material retaining the feelings of clay and en-tout-cas while eliminating the defects of clay and en-tout-cas, such as the mud due to rain, frost columns in winter, and clouds of dust in summer. CONSTITUTION: The soil conditioner mixture comprises a material obtd. by drying and crushing a dehydrated cake obtd. from sludge discharged from a water purification plant, a special sand obtd. by drying a used sand from a slow-speed filtration pond in a water purification plant, and a special material obtd. by sifting a clinker ash.</p> |
