| 摘要 |
PROBLEM TO BE SOLVED: To obtain a setting agent for soil capable of adjusting pH at a neutral region in an early stage as possible in mixing with an object soil to set it, excluding hexavalent chromium in constituents, efficiently using harmless waste such as ash of paper making sludge, or the like, capable of suppressing a manufacturing cost of the products as far as possibly to realize an accessible price. SOLUTION: This setting agent for soil is obtained by mixing ash of paper making sludge, blast-furnace slag, lime and gypsum in a proper ratio, easily decreases a high pH, does not produce hexavalent chromium because the agent is produced in a process not baking at high temperature such as 1,450 deg.C, and is not only safe in environment but also low in product cost compared to conventional products because unnecessary consumption of thermal energy is omitted. |
