Geo-technical

for extremely demanding geological environments

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Levasil® CB is excellent for use underground, especially in environmentally sensitive areas, thanks to its high ground consolidation and water sealing capabilities

Together with a gel-activator, colloidal silica (often referred to as nano silica) creates an ideal sealing grout that accurately matches the targeted application and desired open time. By adjusting colloidal silica grades and concentrations, the perfect geological structure for consolidation can be achieved.

Rock injection

To achieve extremely watertight tunnel structures, cement grouting alone may not be sufficient. By combining traditional grouting with Levasil® CB colloidal silica gel treatment, it is possible to create a durable seal of tunnels in various types of rock.

Construction worker with a laptop standing inside a tunnel

Soil stabilization

Permeation grouting with Levasil® CB gel treatment is used to emplace a low permeability subsurface barrier in sand and silt formations.
The low viscosity Levasil® CB forms after gelling a barrier with very low permeability that is biologically and chemically inert, unaffected by filtration, and environmentally safe.

Soil liquefaction prevention

Liquefaction prevention is done by preventing the water from flowing freely in the saturated sand. The low viscosity Levasil® CB solution penetrates the soil and replaces the water. Once the gel is formed it prevents the liquefaction from occurring.

The mechanism of gelling

When adding an accelerator (a salt solution) to colloidal silica, a gelling process starts. The formed gel network prohibits liquid transport within the gel volume and is a valuable tool in ground consolidation.

Illustration showing the behavior of colloidal silica mixed with an accelerator forming a gel after a controlled time span

Featured products

Levasil colloidal silica

Levasil CB17

Levasil® CB17 is an alkaline, aqueous dispersion of colloidal silica that is approximately 40% solids by weight. The silica dispersion is sodium stabilized and the amorphous silica particles carry a negative surface charge. The silica particles are discrete, have a smooth, spherical shape, and are present in a wide particle size distribution. The physical appearance of the dispersion is an opalescent liquid, slightly more viscous than water. Levasil® CB17 is produced for world-wide distribution.

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Levasil colloidal silica

Levasil CB25

Levasil® CB25 is an alkaline, aqueous dispersion of colloidal silica that is approximately 30% solids by weight. The silica dispersion is sodium stabilized and the amorphous silica particles carry a negative surface charge. The silica particles are discrete, have a slightly uneven, spherical shape, and are present in a narrow particle size distribution. The physical appearance of the dispersion is a translucent liquid, slightly more viscous than water. Levasil® CB25 is produced for world-wide distribution.

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Levasil colloidal silica

Levasil CB30

Levasil® CB30 is an alkaline, aqueous dispersion of colloidal silica that is approximately 30% solids by weight. The silica dispersion is sodium stabilized and the amorphous silica particles carry a negative surface charge. The silica particles are discrete, have a slightly uneven, spherical shape, and are present in a narrow particle size distribution. The physical appearance of the dispersion is a translucent liquid, slightly more viscous than water. Levasil® CB30 is produced for world-wide distribution.

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Levasil colloidal silica

Levasil CB75 LS

Levasil® CB75 LS is an alkaline, aqueous dispersion of colloidal silica that is approximately 15% solids by weight. The silica dispersion is sodium stabilized and the amorphous silica particles carry a negative surface charge. The silica particles are structured to enhance the activity of the dispersion. The physical appearance of the dispersion is a clear liquid, slightly more viscous than water. Levasil® CB75 LS is produced primarily for world-wide distribution.

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Get in touch!

For more information about our Levasil® colloidal silica products, please contact our experts. We look forward to hearing from you.

 

 

If you prefer to call us you can reach us at:

China, Shanghai: +86 21 22205000
Brazil, Jundiaí: +55 11 45894800
Germany, Cologne: +49 221 995850
India, Mumbai:+91 22 6842 6700
Japan, Tokyo:+81 356436001
Singapore: +65 6635 5327; 6635 5203
Sweden, Bohus: +46 31 587000
Taiwan - Greater China, Taichung: +886 4 23270520
USA, Houston: +1 312 3206109

Levasil® is a registered trademark of Nouryon in several countries worldwide.

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