| abstract |
In a process for stabilizing soil by impregnation with an alkaline aqueous gel-forming composition containing (a) a polyphenolic material such as a vegetable tannin extract and (b) a formaldehyde compound such as paraformaldehyde, a surprising improvement in control of gelling rate is achieved by including in said composition a precalculated amount of (c) gelling agent dispersible in said composition and containing a complexing element selected from silicon, vanadium, molybdenum, manganese, titanium, copper, zinc and zirconium. |