| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide a ground-improvement method capable of obtaining a desired setting retarding effect even in the case incapable of sufficiently mixing a solidifying material milk with soil in engineering works such as improvement of ground. SOLUTION: This ground-improvement method comprises adding 0.1-5.0 wt.% setting retarder to a solidifying material [(1) a material containing 50-99 pts.wt. blast furnace stag powder, 0-20 pts.wt. gypsum and 1-30 pts.wt. Portland cement (having 1,350-5,000 cm<2> /g Blaine value), (2) a material containing 50-98 pts.wt. blast furnace slag, 0-20 pts.wt. gypsum, 1-20 pts.wt. Portland cement and 1-10 pts.wt. fine particles of cement hydrate or (3) a material containing 70-92 pts.wt. blast furnace slag, 0-20 pts.wt. gypsum and 1-10 pts.wt. fine particles of cement hydrate] to prepare a solidifying material milk and mixing the milk with soil to solidify the soil.</p> |
