Extending the life of plinths and facades made of artificial stone

If you have made the lining of the house base of artificial stone, you can significantly extend the service life by protecting it from harmful atmospheric effects (primarily from moisture, sunlight and temperature differences). As a protective coating, water-repellent impregnations (known as water repellents), paints and varnishes are widely used. In addition, the hydrophobization of concrete structures (and it is concrete that forms the basis of artificial stone) not only improves their performance, but also gives them an aesthetic appearance (in particular, the effect of a “wet stone”).

Domestic industry produces a wide range of water repellents, differing both in chemical composition (epoxides, polyurethanes, acrylates, etc.) and in price. Therefore, in order to make the optimum choice of protective coating, it is useful to take into account the following.

1.Make sure that the water repellent is primarily designed for concrete, as it can be for brick, for plaster, for slate, for wood, etc. Despite the fact that in most cases, water repellents are complex, it is advisable to give preference to special formulations that take into account the characteristics of a particular material.

2. It should be remembered that water repellents are not intended to protect structures under constant water load (for example, pools). Waterproofing should be used for this purpose.

3. The surface treated with the water-repellent is not plastered and not painted with water-dispersion paints, but allows the application of paint coatings.

4. Most of the water repellents on the Russian market are traditionally based on silicone fluids (including silicone mixtures), which have certain drawbacks. In particular, they have a limited shelf life, and the surfaces covered with them require relatively frequent (1 time every 2-3 years) re-treatment. In this regard, it is useful to pay attention to the polymer water repellents,with a long service life (up to 10 years), improved adhesion and resistance to acids and salts.

5. If the emphasis is on the water-resistant properties of the water-repellent agent (and it is possible to reduce the water resistance of concrete by 1.5–5 times), then attention should be paid to the presence of the additive AMCP (sodium aluminomethylsiliconate). This is especially true for plinths, which suffer the most from exposure to moisture.

6. If you want to minimize the adverse effects of ultraviolet radiation, you can use a protective varnish based on elastic polyurethane resins (for example, Hyperdesmo AD-Y).

Finally, the hallmark of waterproofing is the preservation of gas and vapor permeability (that is, the design "breathes"), which distinguishes it from waterproofing.

Date: 06.11.2018, 16:44 / Views: 64444

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