| 摘要 |
PURPOSE:To solidify the ground in a short gelling time without causing dispersion and scattering, and to strengthen it permanently, by grauting a colloidal solution of silicic acid having a specific pH and a gelling time into the ground. CONSTITUTION:A colloidal solution of silicic acid is blended with an acid, adjusted to 4-7pH and <=20hr gelling time, and grauted into the ground. While it is grauted, it becomes unstable, the gelling time is accelerated, and it is solidified in about 60-120min. In order to obtain the colloidal solution of silicic acid, for example, water-glass is passed through an ion exchange resin, formed silica sol is blended with water glass at 80-90 deg.C, and passed through an ion exchange resin again. |
