| 摘要 |
PURPOSE:A chemical solution for injection into the ground capable of being injected directly without precipitating bulky silica, solidifying weak or water leaking ground, stopping the leakage of water, obtained by adding a water-glass solution to an aqueous solution of a mineral acid, blending them to give an aqueous solution of a nonalkali silicic acid, adjusting it to a proper pH. CONSTITUTION:20wt% water glass is added to an aqueous solution at >=50cm/ sec speed, they are blended to give an aqueous solution of nonalkali silicic acid having >=10wt% water-glass and <=5pH. The aqueous solution is blended with water-glass and/or an alkali substance, adjusted to >=5pH, to give the desired chemical for injection into the ground. |
