By cleaning natural stone we create surfaces as new

By cleaning natural stone we create surfaces as new

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The stone is an eternal material, it has formed for an incredibly long time, it was long in front of people and stays long after us, but if we use the stone as a building material, it is "torn off" from its environment and begins to be subject to the surrounding influences.It ages faster and may not look nice after some time.Especially in very exposed places and outdoor environments.But since it is still a very strong and durable material, it makes sense, its renovation.And truly renovation stone will reach the surfaces as new.Alternatively, chipped pieces can also be repaired, their anti -slip, etc. can simply be conjured with staircases and smooth walks.

After renovation, stone surfaces are even harder and more durable.Why?

Stone floors, staircases, tiles, cornices.Frequent part of particularly historical and many modern buildings.However, only ordinary walking we exhibit stone floors and staircase wear and abrasion.Over time, the surfaces are scratched, grayed and damaged from rolling impurities, including various fluids and chemicals.The role is played by dust, water, colors, grease, salt, punches with heavy and sharp objects, building materials (mortar, plaster mixtures, concrete, interior and facade colors), etc. Even high -durable stone must be maintained and renovated.After renovation, stone surfaces remain smooth, glossy and even harder and more durable and deep pollution thanks to the application of impregnation.In addition, this means that they are easier to maintain and dry faster after cleaning through the wet way.Just after normal mopping.

Renovace schodiště (Zdroj: RENOVACE KAMENE - PETR POKORNÝ)Schodiště po renovaci (Zdroj: RENOVACE KAMENE - PETR POKORNÝ)

Blasting (sanding) or shaking pneumatic pistol without abrasive

Stone and concrete staircases, columns, lining, tombstones, sidewalks, tiles or floors, but even sculptures can be cleaned by the so -called blasting method (sandblasting) or much slower by shaking using a pneumatic pistol without abrasive.However, sandblasting is only suitable for open space.This workflow is very fast, but it is also highly dusty due to the abrasive used.Therefore, the grinding using abrasive cannot be used in the corridors and staircases inside the houses, or in the internal environment.

Kamenný sloup před renovací (Zdroj: RENOVACE KAMENE - PETR POKORNÝ)Kamenný sloup po renovaci (Zdroj: RENOVACE KAMENE - PETR POKORNÝ)

Oproti tomu při oklepávání pneumatickou pistolí (tlakovým vzduchem) bez použití abraziva je prašnost eliminována (výrazně snížena), výsledek je kvalitnější, ale až cca desetkrát pomalejší. Tlakový vzduch pneumatické pistole oklepává povrch materiálu (nejčastěji schodů), aniž by byl obrušován, čímž je materiál navrácen do téměř původní pórovitosti. Pneumatickou pistolí lze vyčistit cca 3 m2 například žulového schodiště za hodinu, zatímco za použití abraziva ve venkovním prostředí lze vyčistit 20 až 25 m2 venkovních ploch za hodinu.

Schodiště před renovací (Zdroj: RENOVACE KAMENE - PETR POKORNÝ)Schodiště po renovaci (Zdroj: RENOVACE KAMENE - PETR POKORNÝ)

Abrasive has high energy at impact

A pneumatic device with a powerful compressor is used in the blasting (sanding) and the most commonly silica sand as an abrasive.However, strict hygienic measures should be followed in its use, as this sand has been found to be carcinogenic in its disintegration.Therefore, a substitute can be a slag and various harmless sands (for example, red Australian sand).

The cleaned area must also be closed and the worker must have a protective suit, gloves, veil and glasses.In addition to carcinogenic dust, the speed of abrasive flying particles is also dangerous.Possible injuries are severely painful and eye injury can be fatal, irreversible.

Renovované kamenné schodiště (Zdroj: RENOVACE KAMENE - PETR POKORNÝ)Renovované kamenné schodiště (Zdroj: RENOVACE KAMENE - PETR POKORNÝ)

The cleaning method is always dry, the dust from the crumbling sand can only be moistened

Whether the stone is cleaned with a knocking pneumatic pistol (pressure air) or with the help of abrasive (abrasive and air mixture), it is always a dry method, so the real difference is only in the abrasive used.The air pressure can always be set depending on the material treated.And you can also clean the air pressure, for example, old binding beams and other wooden and other elements of historical buildings.Cleaning by pressure air is then lengthy, more expensive (paying for higher labor), but much better.Dust can be reduced by adding the ring with the fog in front of the nozzle, so the dust is wet, but it is still not a wet cleaning.Unfortunately, avoiding any dust is impossible.

Renovovat a čistit lze různé povrchy, strop před vyčištěním (Zdroj: RENOVACE KAMENE - PETR POKORNÝ)Strop po vyčištění (Zdroj: RENOVACE KAMENE - PETR POKORNÝ)

Pneumatic gun cleaning is more gentle and better

When knocking with pressure air, the pneumatic gun splits the surfaces of the surface, which is cleaned and roughened, but not as much as with the help of abrasive.Therefore, we achieve lower quality of work.The abrasive in the surface downright cuts miniature holes, which is roughened, but also a certain layer.In addition, the surface is also rounded, while cleaning the shaking of the pneumatic gun retains sharp edges.

Kamenná zídka po renovaci (Zdroj: RENOVACE KAMENE - PETR POKORNÝ)Podlaha po renovaci (Zdroj: RENOVACE KAMENE - PETR POKORNÝ)

Without abrasive, the walls are cleaned in the vast majority of cases, and the incident sand could damage the facade, beat the cellar windows, damage the window frames, etc. Therefore, it would be necessary to lift the delicate parts.Mechanical cleaning of pneumatic pistol without abrasive is more suitable for stone, which is fragile and abrasive would easily damage.In addition, more powerful compressors are used to clean the air and abrasive mixtures.

If we compare the fraction of the abrasive with stucco, the stucco sand contains particles up to 10 times smaller, while the abrasive stones for pressure cleaning are about 2 to 3 mm large.But it is also possible to use stones calibrated to a smaller size.

Schodiště před renovací (Zdroj: RENOVACE KAMENE - PETR POKORNÝ)Schodiště po renovaci (Zdroj: RENOVACE KAMENE - PETR POKORNÝ)

Oil

After cleaning by pressure (whether with or without abrasive), the cleaned material is eventually treated in the same way.It is impregnated with oil -free impregnation to form a paint layer.It is as if the stone was covered with plastic.The durability of this layer then depends on the operation, but also the climate and industrial exhalations.In places with high loads, the protective layer is quickly worn, so impregnation should be regularly renewed here, delaying the time of the next necessary renovation of the stone.

Schodiště po renovaci (Zdroj: RENOVACE KAMENE - PETR POKORNÝ)Vyčištěná klenba (Zdroj: RENOVACE KAMENE - PETR POKORNÝ)

Need regular maintenance of renovated areas

The treated surfaces should then be washed regularly so that the surface deposits of dust and dirt do not damage the realized surface treatment to the previous gray and dirt.Nothing is eternal.Even in nature, the stone gradually disintegrates and dirt adheres to its surfaces.

Zašlá a vyčištěná část kamenné dlažby (Zdroj: RENOVACE KAMENE - PETR POKORNÝ)Kamenná dlažba (Zdroj: RENOVACE KAMENE - PETR POKORNÝ)Přečíst další článek
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