| 摘要 |
PURPOSE:A ground-impregnating agent that contains, as major components, aqueous sodium silicate and an acidic solution, further amorphous silicon dioxide, as a minor component, thus increasing the strength of the soil treated therewith greatly and being suitable for the flash-setting process. CONSTITUTION:The objective ground-impregnating agent is obtained by adding (A) amorphous silicon dioxide, preferably a fine powder of white carbon of more than 50m<2>/g specific surface area and less than 20mu particle sizes, preferably 1.0-15% based on the total amount of the following components B and C, to the major components consisting of (B) aqueous sodium silicate, preferably of 40-60% concentration, and (C) an acidic solution such as aqueous mineral acid, e.g. aqueous sulfuric acid or aqueous acidic mineral acid salt such as sodium acidic sulfate. Before impregnation, component A is combined with components B and/or C and components B and C are injected into the soil ground separately to effect their contact and gelation in the ground to stabilize it. |
