How to Pour Cement Slurry Quickly and Accurately on a Sloping Mountain!
Hello, everyone. This is Enta. When the cement slurry doesn’t rise during rebar insertion, what do you do? I don’t think many of you just keep pouring the cement slurry without doing anything. After all, you want to get it up as quickly as possible! lol So, what do you do…?
If the cement slurry turns out too stiff when you're making it, don't add just water!
Hello, everyone. This is Enta. When you’ve mixed a few batches of grout, the grout left in the mixer tends to get pretty hard, right? What do you do in that case? This video shows what happens when you add something to that hardened grout! At first, it’s all clumpy…
Is a thicker cement slurry more effective?
Hello, everyone. This is Enta. You know how you take test specimens (cement slurry) at job sites, right? Like for ground anchor work, rebar insertion, or piles. There are all kinds of projects, but when you’re making these test specimens, if they’re extremely soft, you just throw them away, right? lol But on the other hand, if they’re on the hard side…
Risks and Troubleshooting in Grouting Operations (Part 2)
Hello, everyone. This is Enta. Risks and Troubleshooting in Grouting Work (Part 1) This is a continuation of my previous post. Since 1 m³ equals 1,230 kg (approximately 50 bags), this means that for the rebar insertion work we discussed the other day—with a borehole diameter of φ90 and a borehole depth of 5.0 m—we would have inserted about 10 times the amount specified in the design…
In ground anchor construction, wouldn't it be possible to minimize risks by ensuring that the grouting of the free length is done more thoroughly than that of the anchorage section?
Hello, everyone. This is Enta. Do you know what this is? The distinctive feature is the circular pattern leading toward the center, right? This is pressure-cured concrete, which was hardened while under pressure. (I’ve shown this before, lol.) The cement slurry from the packer goes inside…
As a rebar installer, I tried using a new grout material that’s different from cement slurry for the first time!
Hello, everyone. This is Enta. I did my first construction job the other day. I can’t go into too much detail, but it was the NATM method, lol. You know, the one they often use for tunnels and such. The injection pressure was around 2 MPa, and it took about a minute for the material to set (gel time). (…
If the cement slurry is too thick, do not add water to thin it out!
Hello, everyone. This is Enta. When you’ve mixed a few batches of grout, the grout left in the mixer tends to get pretty hard, right? What do you do in that case? This video shows what happens when you add something to that hardened grout! At first, it’s all clumpy…
How to Make a Packer for Ground Anchor Construction (Part 6)
Hello, everyone. This is Enta. I do a lot of construction training and instruction at our job sites. Just the other day, someone came all the way from Yamagata to conduct a training session on the Moldam method. Next month, I’ll be heading out to another company to provide instruction on rotary percussion construction. I’ve been getting more and more of those kinds of jobs lately, lol. Well…
How to Make a Packer for Ground Anchor Construction (Part 5)
Hello, everyone. This is Enta. I’ve been in Odawara for the past few days! We’re currently carrying out reinforcement work to prevent a stone wall from collapsing in Odawara, and the project also includes some concrete repair work. Because of that, we brought in some backup from Chiba to help with the plastering! This is Yocchan from Yoshida Plastering! He’s using a special, jet-black premix…