Polyurethane foam in the formwork structure. Is it realistic for her to withstand the mass of concrete?

The reliability of the formwork is something that many neglect, especially with no experience in construction. And to come up with something new and dubious is generally the duty of a self-builder.

Pouring a concrete basement, a foundation for a house, an armored belt and a lintel, a concrete septic tank... During my still short "career" as a builder, I had to face a lot.

The whole history of my construction read on the channel.

• And there were several moments when the formwork was bursting with the mass of concrete
• And it flowed from the cracks in the corners, which were poorly fixed.
• And in general, the entire structure of the formwork was lifted from the vibration of concrete.

With all this, he seemed to be reinsured and was confident in reliability.

But there is one thing that has never failed.

✅ Although its reliability, I doubted in the first place.

Polyurethane foam, in the formwork structure. Only a self-builder would come up with such a thing.

Of course, this is not the basis of the basics, do not think that everything rested on it, but in a number of cases it was very useful.

Uneven boards, crooked structures, etc., inevitably lead to the formation of cracks in the formwork. And through them a decent mass of concrete can come out, especially with its normal vibration.

Here I blew out these cracks with polyurethane foam.

And not only 5 mm. It came up to 20 mm., and on fairly high walls (like on the walls of a septic tankAnd when pouring concrete, everything was fine.

Of course, everyone can use this technology. I do not claim authorship. But who has not come across, then I recommend to use, only in moderation.

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