| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide backfill composed of refuse improved in fluidity of slurry and in gas permeability necessary for the backfill for widening a range of reusing PS(paper sludgy) ash and disused clay. SOLUTION: The backfill composed of refuse is essentially obtained by mixing the PS ash, cement, and water and slurried, wherein the PS ash slurry is added with the disused clay, the grain size of the slurry is adjusted, and added with foaming material. Thereby, desirable fluidity and gas permeability for backfill are attained, and the range of reusing the PS ash and the disused clay is widened.</p> |
