Technology "Washed concrete." Start

In winter 2017. The Internet got video:

Because I was already familiar with the decorative surface of the gravel, which I did in the blind area and the facade of the foundation baths, then this technology interested. As can be seen, it allows to obtain decorative surfaces are much better, more beautiful and more sophisticated process.

From clips clear that in poured concrete form, the product was taken out after a certain time and washed thin layer of concrete. But concrete is gaining strength in its entirety, and even a thin layer from the surface of its already just can not be washed. Perhaps the secret of the paper, which is filmed working with forms on the video.

I reviewed a lot of these videos in youtube. Concluded that the use of some concrete setting retarder. Some authors like video offered it for sale: Detached for horizontal forms (varnish) and separately for vertical surfaces (gel).

The search engines have found many examples of products made with this technology:

Someone like coatings of artificial stone, someone just brickwork, and I really liked the decorative covering under the gravel. Especially, it is not plaster (although this technology is also found later), and a monolithic casting. Those. Floor, the stones themselves whether once vryat fall off.

I decided to study this technology and at the beginning of the season to try to make something of it. During the study realized that as a moderator concrete curing can be used certain sugars, namely dextrin (roasted starch).

One could buy ready-made concrete retarder (the companies of the rollers). But I thought I could find itself the secret of this chemistry. Moreover, it was the belief that it costs 10 times lower than that offered by these companies (requests for the price I did).

Later I told about this technology brother. He sent pictures of decorative pebbles under the blind area in one of the houses in our town. Otmostka tiled, visible on the concrete base. Those. working technology.

I bought starch and burned when it 200gr. in the oven. He acquired a brown color as the dextrin in the photos. Also in the city I found a company who trades in industrial chemistry, in particular concrete retarders. I go there and explain what I need - managers gave me a sample of 1 kg of product. The powder is sold in bags of 25 kg - as long as that amount I did not need.

In April, with the onset of heat at the portion made of several forms of scrap materials 25h25sm size. Spread chemistry: Detached homemade dextrin and certain industrial retarder. I handled the bottom of the form. He added concrete and drove home to heat. The next day, I took out a form. Here's what happened:

Chemistry worked concrete layer washed off. But fractional composition of concrete has not been picked up. You need to add more gravel. Several tiles were brittle and cracked when stripping forms - too early to take out and chemistry absorbed into the concrete structure. I concluded that the paper used in the video is not just. It turns out that it was impregnated with this chemistry, allowed to dry and then placed in a mold before pouring the concrete. Thus, in the play of a few millimeters concrete, concrete internal structure is not impregnated with the retarder.

Next I bought a plastic mold 30h30sm for casting concrete slabs for garden paths. Bought wrapping paper, cut to size form 30h30sm soaked chemistry and gave the paper to dry. Was the wind and the paper dried up quickly. Kneaded concrete. At the bottom of the forms selected poured gravel, then laid out in the form of concrete, slightly provibriroval.

I came the next day and took the form of the product. Here's what happened this time:

Uncured not washed off the concrete layer with water usual plastic brush. Automotive I do not wash. There were thought to buy it. But with water - a question not yet drilled well.

When the tile is wet, it looks much nicer. Those. such products must be coated with lacquer or primer which impart wet stone effect.

Personally me such a surface made of natural pebbles is perceived as more "hot" than tiles made of artificial stone.

The result was a decorative tile on concrete price (not including work). Especially, its surface is resistant to mechanical stress. It can not be scratched, damaged metal objects, as opposed to a concrete or gypsum based. Quartzite and similar rocks, which form the basis of gravel - very durable.

Products and surfaces where you can apply a decorative surface in their home and on the site - many: the blind area buildings, garden paths, fence blocks, facade and etc ...

Decided to use this technology in their construction. Where it - read the following articles.

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Who are interested in this technology, I can advise you, tell you how to implement it in the production or use private construction, what kind of products can be made on the basis of this decorative coating, chemistry and some forms need purchase. E-mail to communicate on the channel description the main page

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