| 摘要 |
PROBLEM TO BE SOLVED: To provide a method of producing a backfill material at a site without labor hours in which liquefaction is not performed, and uniaxial compressive strength is possessed in which re-excavation can be performed.SOLUTION: A production method of a backfill material includes: a step in which an inorganic sludge 10 is added with a solidification material A11, performed by granulation ST1 to form a granulation object 18; and a step in which a waste molten slag 13 and a granulation object 18 are performed by mixing treatment ST2 by a mix proportion set so that uniaxial compressive strength of a backfill material 15 in a material age of 28 days may be at least 100 kPa and at most 200 kPa to produce a backfill material 15. In the present invention, it is only that a granulation object 18 in which an inorganic sludge 10 is added with a solidification material A11 to be granulated, and a waste molten slag 13 are mixed, thereby a backfill material 15 in which liquefaction is not performed, uniaxial compressive strength is possessed in which re-excavation can be performed can be produced at a site without labor hours. |
