The construction industry is always on the lookout for ways to improve concrete performance. Naturally solutions must be both economically and environmentally sound. Colloidal Silica is a solution with several distinct advantages, besides being chemically inert.

In concrete applications, such as shotcrete, SCC (self compacting concrete) and pre-cast, Levasil Colloidal Silica works exceptionally well as a stabilizer, a durability enhancer, an accelerator and a strength developer. Colloidal silica produces extremely stable, bleed-free cement slurries without free water.

Colloidal particles interact with the free lime (calcium hydroxide) – created during cement hydration – to create calcium silicate binders. These binders produce a cohesive gel structure that enhances cement-paste density, reinforces the structure between cement grains, and eliminates free water.

When added to self-compacting concrete applications, segregation of aggregates is controlled and bleed is prevented – making the mix more stable and workable.

A selection of our Levasil CB products for concrete applications:

Product Density
g/cm3
pH Solids Content Viscosity
cP
Levasil CB25 A 1.2 6.5 30% <10
Levasil CB30 1.2 10.5 30% <10
Levasil CB45 A 1.1 9.5 15% <5
Levasil CB8 1.4 9.5 50% <10

Levasil Colloidal Silica applications within construction

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