How many 20 kg bags of rough concrete can be mixed in a 135 l mixer?

[BORNER]

We will cast a small retaining wall with coarse concrete that comes in 20 kg bags and I am wondering what is the optimal number in a 135-liter mixer so that the finished concrete can still be handled.

 

[holmberg87]

We are going to cast a small retaining wall with coarse concrete that comes in 20 kg bags, and I wonder what the optimal number is in a 135-liter mixer so that you can still handle the finished concrete.

I would say that 3 bags are suitable. Easier to mix and absolutely no problem to handle either. That's how I've done it in my 130-liter mixer, and more than these bags would be too much, I think.

 

[BORNER]

I would say that 3 bags are just right. Easier to mix and absolutely no danger in handling either. That's how I've done it in my 130l mixer and more than those bags would be too much, I think.

Thanks! I'll go with that!