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Injection resin

The Injection resin used for the impregnation of walls subjected to rising moisture must possess the ability to reverse the meniscus of water; This reversal realizes only because moisture is not able to wet the walls of the capillaries which are present in the properly treated walls.

The phenomenon is based on the principle that the height of rising water in a capillary depends on the surface tension present on the surface of the capillary itself: a good dehumidifying product must therefore have , in order to produce a strong lowering of the surface tension , the ability to penetrate deeply to the whole section of the stonework and hydrophobize the treated surfaces.

Mode of application
The walls are prepared by removing the plaster to a height of about 40 cm measured from the floor and for the whole zone where the moisture barrier will be realized.
A series of holes of about 10-18 mm diameter will be made into the wall, at 10-20 cm intervals from each other, on a horizontal axis ( and/or vertical) to a height of 5-15 cm above the ground floor and however above the share of the top floor decking.
Depending on the type of stonework , the arrangement of the holes to be provided varies:
• For brick masonry holes will be drilled directly on them ;
• For a mixed stone masonry the holes will be drilled in the binder.

Injection resin
This system consists in Injection resin in the masonry the formulations PAVAREL and/or PAVAREL ECO 64, that are injected at low pressure: the use of pressure obviously facilitates the expulsion from the pores which are already saturated from the water that is contained in it, and it  promotes the penetration of hydrophobic products.
We proceed by drilling holes near the areas of intervention . Then in the holes are fixed ( by using expansion plugs )  the nozzles which are connected to a pumping system through flexible pipes.
The product is injected into the masonry at a pressure of about 5-7 atmospheres ; in function of the type of intervention the injection time normally ranges from one to several minutes.
The processing is performed by alternating the injection drilling and increasing the depth of the holes as soon as the treated wall section is saturated by the product; in this way it operates in an impregnation rejection in ever deeper sections of masonry.
This procedure allows to pierce the masonry both from one side than from both sides with a horizontal, vertical or inclined trend.
The use of the solvent system PAVARELborne systems such PAVAREL H2O although the latter have a minimal environmental impact.
On the other hand once the areas are airy and the small percentage of solvent is removed there are no problems . Yet our laboratories have developed a new system PAVAREL ECO 64 which combines high performance with low environmental impact.
In case of big infiltration it is preferable to use the foaming product PAVASEAL W which, being injected deeply , intercepts the infiltration by reacting immediately with the moisture present; so it blocks the path immediately.
After the various interventions we can proceed with the verification of the areas through surveys with digital hygrometers coupled with infrared thermography techniques in order to map all the areas of intervention and investigate their effectiveness; the same a test report from a qualified technician will be issued to guarantee the works.

Products
- Pavarel Injection resin : Water-repellent impregnating product, it constitutes an obstacle to lasting penetration of rain water and dripping walls, without hindering breathability ;
- Pavarel Eco 64: Transparent one-component product with low environmental impact.
Water-repellent impregnating product, it constitutes an obstacle to long-term rain water penetration and dripping in the walls , without hindering breathability.
- Very quickly drying.
- Effect of pearling (water repellent ) appears after a few hours of application.
- Resistance to aging : freeze/thaw , U. V , etc. .
- Re-coating with vinyl - acrylics water-based paint.
- Pavarel h2o : Water-repellent impregnating product, it constitutes an obstacle to lasting penetration of rain water and dripping walls, without hindering breathability ;
- Pavaseal W: Two-component product with fast-growing and highly reactive in the presence of moisture.

To receive technical data sheets please contact our offices

 

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