| 摘要 |
PURPOSE:To provide the title agent of reduced chemical cost, capable of forming highly water-impermeable layer, high in safety, causing little groundwater pollution, for use in ground improvement, comprising as essential components a water-soluble polymer, foaming agent and gelling agent consisting of a borate. CONSTITUTION:The objective water stopping agent comprising, as the essential components, (A) 0.1-5wt.% of a water-soluble polymer including natural polysaccharide such as guar gum or locust beam gum, polysaccharide externally secreted by bacteria such as xanthane gum or pullulan and PUA, (B)0.01-2wt.% of a foaming agent, and (C) 0.005-1wt.% based on the component A, of a borate such as borax, potassium borate or calcium borate. |
