| 摘要 |
PURPOSE: To obtain a grouting composition suitable for improving esp. poor ground in the seaside area by incorporating a quick-setting cement with a setting regulator comprising an organic acid compound, alkali metal carbonate and acidic substance. CONSTITUTION: This grouting composition is obtained by incorporating (A) 100 pts.wt. of a quick-setting cement comprising 100 pts.wt. of cement and 5-60 pts.wt. of a quick-setting material comprising calcium aluminate (and gypsum) with a setting regulator comprising (B) 0.01-10 pts.wt. of an organic acid compound, (C) 0.01-10 pts.wt. of an alkali metal carbonate and (D) 0.01-10 pts.wt. of an acidic substance. In prectical use, a cement slurry is prepared from 100 pts.wt. of cement and 90-250 pts.wt. of water, while another slurry is prepared from the quick-setting material, the setting regulator and 150-600 pts.wt., based ib 100 pts.wt. of the quick-setting material, of water, and both the slurries are mixed with each other and the mixture is injected into the ground to accomplish soil improvement. |
