I think it’s fine to do away with the use of trowels in spray-applied formwork work.

Hello, everyone.

This is Enta.

It's already summer, isn't it?

The rainy season hasn't ended yet, though.

The expected end of this year's rainy season is as follows:

Start and End of the Rainy Season in Reiwa 6 (Preliminary Figures)

It looks like the heavy rain might continue, so let's be careful on our way there ^^


But that's beside the point.

Legal Framework

This is the legal framework.

Do you know why this happens? lol

Legal Framework

You can see that the mortar on the surface is flaking off, right?

 

I think the reason it came off was because I used a curling iron.

For formwork spraying, the formwork is assembled before spraying begins.

After erecting the formwork, spray mortar into the formwork.

Immediately afterward, apply the trowel to neatly define the edges and shape the surface.

Legal Framework

Lately, I've been tending not to use a curling iron.

Since it is not included in either the specifications or the cost estimate, there is no need to apply a trowel finish.

In fact, the surface strength is higher and the mortar adheres better when you don't use a trowel, so I recommend not using one.

 

However, since the surface becomes too uneven, after spraying, I use a trowel to smooth it out before applying the final coat.

Framework Engineer

Special Legal Framework↑

Spray-Applied Formwork

The above is the legal framework without the "kote."

 

Spray-Applied Concrete Worker

Here is a photo showing the ironing process (20 years ago).

 

When using a trowel, you finish the surface with the trowel after spraying, and it feels like you're piling the material onto a mesh.

Since we usually pile it up to about 1 cm, it inevitably tends to peel off there.

Also, since efflorescence is forming in the areas where the coating is peeling off, that makes it even more of an issue.

Efflorescence

Ironing

The use of trowels by formwork workers has been discontinuedI think that's fine.

Whenever I see people still using a curling iron, I can’t help but think, “They shouldn’t be spending money on that.”

Since there’s no one around, I’d like to keep things simple and avoid doing anything unnecessary.

 

See you later.

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