Technology "Washed concrete." After some time, you can remove the blocks from the forms?

The second season I manufactures various products on your site in a greenhouse, workshop. The whole process, technology description and examples can be found in the articles in this channel.

Currently engaged in the manufacture of decorative plates on the metal fence posts.

In the summer time had come for taking out and purifying units, linings on the day following their fill. Believed that after a maximum of two days, the surface layer of concrete, which is in contact with the moderator setting (they are covered with mold inside) - is also captured and wash the product, get the decorative layer is not out.

Especially in the greenhouse during the day was hot, the concrete quickly grasp.

Due to late stripping after pouring the concrete fence of the ribbon under the decorative layer I have not turned out. Formwork covered with wrapping paper soaked in concrete setting retarder. But was able to come on the third day after pouring. Unfortunately, concrete had missed throughout and decorative layer was not turned.

With the onset of autumn, one evening could not come to cleanse products come almost a week. I thought pads to fully grasp and they can be thrown out.

But I was surprised that it worked out. They purified the same way as in the case of taking out the form on the following day. I thought that perhaps coincidence factors played a role (low temperature, the amount of cement in the concrete). Clean the mold, he covered them with a moderator, poured concrete:

Poured more forms for paving slabs. And come back in a week, because in the evenings because of the short daylight hours it makes no sense to go to the site.

Tiles and plates perfectly cleaned.

Note that since working retarder, which is divorced from the wallpaper paste (gel). Then, the tape fence impregnated paper I simply aqueous solution moderator. The composition of the adhesive on wholemeal as if pushing the cement from the surface layer, leaving almost sand.

Moreover, if the time of purification of products, tiles or fence cover almost dry out, this layer peeled off easily as a concrete dust from the sand has no strength. But strength in the concrete retarder is not affected.

So with the retarder of concrete based on dextrin and polimetilennaftalinsulfonatov Sodium (Polyplast SP-1), there is no fear that products will be taken out later are unsuitable for purification or washing. Home - Add wallpaper paste to obtain a gel for application layer forms on the surface.

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