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The water glass is a chemical substance known in past centuries. Since 1825, thanks to Johan Nepomuk von Fuchs, the industrial production of soluble sodium silicates was analyzed, known as "liquid glass" (waterglass). The waterglass is nothing more than sodium silicate.
In the proprietary formula of Ecobeton, the sodium silicate is added a special catalyst (Evercrete ®) which allows the waterglass to penetrate deep into the concrete and seal the cement matrix permanently. The waterglass becomes Evercrete Vetrofluid.
The reaction, which is unleashed by impregnating the porous concrete with Evercrete Vetrofluid, leads to the formation of a gel based on calcium silicate and lye:
This reaction occurs thanks to free calcium hydroxide, a concrete component. In Figure 1 you can see a capillary pore of the concrete impregnated with Evercrete Vetrofluid
In the figure the diagram of a impregnated pore (left) with calcium diffusion from the concrete mass and subsequent precipitation of the gel and constriction of the pore after impregnation (right)
The water glass involves a precipitation of solid substances in the pores with a consequent reduction of the middle section of the pores of the impregnated layer. This reaction involves:
Figure 2 - mercury porosimeter test to determine pores constriction
Thanks to Evercrete® catalyst, the effect is dramatically amplified thanks to the depth of penetration (up to 40 mm), making Evercrete Vetrofluid a high performance protection and waterproofing agent, with CE Mark level 2 + according to UNI EN 1504-2 "Protection and repair of concrete structures."