| 摘要 |
PURPOSE:To solidify the ground in a short gelling time and to strength it permanently without causing dispersion and scattering, by blending a colloidal solution of silicic acid with an alkali metal salt, etc. CONSTITUTION:(A) A colloidal solution of silicic acid is blended with (B) an alkaline(earth) metal salt or aluminum salt, and the blend whose gelling time is adjusted to <=20hr in impregnated into the ground. While it is impregnated, it becomes unstable, the gelling is accelerated, and it is solidified. The component A, from which Na ion is almost separated and removed, whose pH is usually adjusted to 8-10, SiO2 concentration to 10-60wt%, and Na2O to 0.01- 4wt%, is used. |
