| 摘要 |
PROBLEM TO BE SOLVED: To provide a modifying treatment material solving the problems that, in making a civil engineering treatment of or reusing mass-generated sludge in dams and at the bottom of the sea, sludge soil or highly water-bearing sludge or the like discharged from construction sites and water-bearing clay and the like in farmland including paddy field, mass energy consumption, environmental pollution due to harmful hexavalent chromium, impossibility of hardening in organic matter-containing soil or the like, high alkalinity given by the resultant modified soil, biological availability cycle destruction due to such high alkalinity have been involved in conventional technologies. SOLUTION: This modifying treatment material is prepared as a powdery one-pack composite composition comprising the main components consisting of a calcia composition, an aluminum sulfate composition and an aluminum phosphate composition, and as necessary a modifying auxiliary composition. This new material thus prepared is put to contact to mix with fluid or plastic water-bearing mud soil at normal temperatures to effect treatment modification of the mud soil into nonfluid modified soil with its pH secured to <11, thus enabling the mud soil to be effectively reused as the modified soil in various useful applications. The modifying treatment technology as described above is also provided.
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