Product > Construction industry
RAM Soil consolidation
For many years, chemicals have been used to consolidate friable soils, sandy soils, such that the permeability of cement systems could have maximum a partial success.
The sodium silicates have been the basis of these chemicals and have been used since 1920.
The first technique was the direct injection of sodium silicate directly in the ground which was to be treated. This was then consolidated or "gelled" by the injection of a second reagent which, in most cases, cause immediate solidification. The curing process for this "two-shot" were usually organic salts such as sodium chloride and the technique is named after the Dutch engineer Joosten who overcame some initial problems of this method. Best used, the process can produce gel hard but the treatment often loses consistency, probably due to the poor and non-homogeneous mixing of the reagents in the subsurface.
The process "one-shot" which consists of a single injection was developed to overcome these problems as well. This relies on the use of agents reagents to slower reaction which can then be dispersed in the sodium silicate prior to injection. By varying the level of sodium silicate and in the premix dell'hardener you have control on viscosity and gel time, thus allowing enough time to maneuver before the injection.
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