Come waterproofing concrete
To ensure a good durability of the concrete particular attention should be paid to his waterproofing total. The concrete protection was designed as a kind of skin, a coating, to be applied according to the solutions.
The different methods used are represented by sheaths, reinforced membranes that protect and envelop the concrete, making it more strong e resistant.
A material often used is the polyethylene, a synthetic polymer.
It’s a thermoplastic resin with excellent insulating properties, very versatile and the cheapest of the plastics.
Rupture of the membranes
Very often, however, you could run into the rupture of the membrane due to the filling material. After the casting of the concrete, in fact, the backfill with pieces of bricks and excavated land adjacent to the construction site.
Due to settling movements, the protruding parts of these materials could damage the protection and lead to the rupture of the sheath, which will later favor infiltrations and, as is well known, these can lead to damage of various kinds.
Such damage initially shows itself with the formation of aloni of various colors, depending on whether the water is clean or dirty. Later, if the infiltration is omitted, you arrive at postings plaster with real collapses of the structure.
To avoid this, it is good practice to add waterproofing additives to concrete.
The effect waterproofing you can have either by mixing the powder additive into the concrete mix, or by using the additive to form a boiacca, a semi-liquid mixture of water and cement.
The ultimate goal is to sharply reduce the capillary porosity of the cement paste.
Such additives are considered water repellent and guarantee excellent results on walls subject to repeated water infiltrations. There are many companies that deal with the production of additives for the protection of concrete, let’s see two in detail.
Sika: for lasting protection of concrete
The company Sika Italia deals with integrated chemistry in the building sector and has particular importance in the creation of additives for concrete that allow the reduction of emissions of CO2.
In particular Sika FerroGard903 Plus è un inhibitor of corrosion used as protection of reinforced concrete, based on organic components which forms a protective layer on the surface of the armor.
It is used for treatment anticorrosive of concrete that is subject to chlorides or carbonation, both underground and above ground.
Its features are many:
- Protects in the long term;
- The application is simple and inexpensive;
- It does not change the appearance of the concrete;
- Protects the anodic and cathodic areas.
Another product used for waterproofing and protecting concrete is Sikagard® 740 W a reactive impregnation for concrete composed of a concentrated emulsion of low viscosity silane.
It is used as a treatment hydrophobic for materials such as concrete or even for vertical or horizontal surfaces.
Has good property humidity control, increased resistivity and protection.
Its advantages are:
- easy economic use;
- the reduction in the absorption of aggressive substances;
- the increase in resistance of concrete with regard to freeze-thaw cycles;
- resistance to sea water.
Penetron: protection of concrete by crystallization
The concrete protection and waterproofing system by crystallization is one of the most innovative solutions proposed by PENETRON ITALIA srl.
It is considered one integral technology and very advanced since it affects the building as a whole, so as to ensure the durability of the work throughout the operating phase.
The elements contained in the product create a crystalline complex waterproof that penetrates the entire thickness, sealing the pores.
The Penetron remains inert when there is no humidity, but reactivates instantly when the humidity reappears, renewing the process of crystallization, to ensure impermeability of the structure over time.
It can also be useful when you have injuries and when you need protection from the push of water. The benefits are manifold, especially against the humidity of the subsoil, the freeze-thaw cycles, corrosion from atmospheric agents.
Penetron Admix: a particular additive for concrete
Penetron Admix® it is used as an additive in the phase of packaging of the concrete mix design for integral waterproofing using crystallization of concrete structures from the beginning, when casting is made.
Penetron Admix it is made up of Portland cement, silica sand and various chemical components which, together with the cement compounds and humidity, form a series of crystals that close the pores and cracks.
The concrete structure is therefore preparing to become impermeable to water and protected from contaminants. This system, thanks to its performance characteristics, allows to solve problems of various types, even in the industrial field, thanks to the resistence to chemical aggressions.
The benefits are many:
- Protects concrete and reinforcement;
- It is not toxic;
- Resistant to chemical agents;
- Withstands large hydrostatic pressures;
- Increases the durability of concrete.
It can therefore be said that the use of products Penetron O Sika they are cutting-edge solutions, compared to traditional technologies, which guarantee quality characteristics, time and labor savings.
Source: LAVORINCASA.it by www.lavorincasa.it.
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