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Hello

"Q&A on Slope Protection Works"—National Association for the Protection of Specified Slopes

It is stated in the section on rock bolts.

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Generally speaking,
The flatness of the test specimen’s loading surface shall be within 0.05 % of its diameter.
(Preparation of Test Specimens for Concrete Strength Testing—JIS A 1132:2020)

There is a standard called...
Therefore, please cap or polish the surface as much as possible.

If this is not done, strength variations are likely to occur, and in some cases, the required strength may not be achieved due to uneven loading.

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I'm sorry I didn't notice.

I'll write about this on my blog soon.

I know it's probably too late, but I'd appreciate your help.

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I'm sorry for the delay.

First, Kakudoku-kun has a maximum angle of 20 degrees.
If you want to set it to 27 degrees, you'll need a + taper plate.

And as you said, if it ever touched the ground even once, it’s impossible.

You can't really understand 3D unless you draw it in 3D CAD, lol.

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When installing basic rebar, cut the rebar mesh!

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I'm sorry I didn't notice this question until now.

It's a bit late, but here's the answer to your question.

The downside of this cushion material is that you have to install the pressure-receiving plate, apply temporary tension, and then inject the material into the cushion.
Also, since it becomes fully set only after curing, it’s quite labor-intensive.

I don't think it will have any particular impact on the final product, but it is certainly time-consuming.
On the other hand, since it is injected firmly behind the pressure plate and can level out any unevenness, it is highly effective.

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There are so many different kinds of masks that it can be confusing, but basically, they're hot, lol.

It seems like people aren't wearing masks on site right now.

When I was wearing a mask, it got wet from my sweat... lol

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