Hello, everyone.

This is Enta.

Are there any cracks in the sprayed coating?

You get hairline cracks and sagging cracks, don't you?

No way lol

 

I think I've put a lot of effort into improving this.

Slightly reducing the water-to-cement ratio, adding fibers, adding admixtures, inserting steel spacers, spraying water, or using a forced-action mixer.

I've done just about everything there is to do.

However, there’s hardly any method that can be called “the best” so far.

 

I have been asked about this issue time and time again by inspectors, the general contractor, employees of the general contractor, and the subcontractor.

However, almost everything I've tried has been a failure.

I say "almost" because there have been a few times when I actually got pretty close, lol.

 

However,The bottom line is: the crack will definitely form!

We will accurately communicate this information to the inspectors, the general contractor, and the subcontractors.

There will definitely be cracks.

However, we are doing everything we can to prevent that from happening.

That's what I try to say.

 

Please don't even think about telling a half-truth here just to make a good impression on the inspector.

Inspectors are professionals, too.

I'm testing the agent's abilities. (I'm being a bit mean, lol.)

Of course I know that. I know it's going to crack.

It’s mostly the younger staff members who are particular about these things, but I guess that can’t be helped… (We’ll just have to talk it over.)

 

To begin with, there’s a reason why the small-cross-section concrete products we produce—such as on-site sprayed formwork and sprayed concrete—are prone to cracking.

To put it simply, I'm easily influenced by my surroundings.

For example, moisture in the soil or moisture in the air. A place where the wind blew during the cool morning hours versus a place where it blew during the sweltering heat of the afternoon.

It's clear that the water content, evaporation rate, and duration of effect are all different, right?

The surrounding environment always has a huge impact.

You might think, “A 500-frame structure is huge, isn’t it?” but take a look at any concrete structure around you.

There are a ton of massive columns, right? And even though they’re carefully protected with plywood and unveiled as if they were in a box, the concrete structures on our slope are left out in the open until they harden, lol.

Well, there's a very high chance it'll crack, isn't there?

They're treated differently, lol

It's important to recover as honestly as possible.

Since there's no way to stop things from getting in, I guess the only option is to make a V-cut and apply resin caulk.

Even if you apply mortar on top, it’s only a matter of time before it cracks and falls off, so I think using caulk or something similar would be better—but it stands out at first glance, so it looks pretty unsightly...

This is another tricky part.

Is there no caulk that matches the color of cured concrete??

It looks like it'll sell well as a replacement part, lol.

 

See you later.