Put up shelves/pictures aerated concrete

[famrpk]

Want to set up shelves and paintings in the apartment, helped a neighbor renovate and demolish a bit and saw that the walls are made of some type of leca and then the lightest concrete available, reminiscent of Chinese "tofu dreg."

Have previously tried with wall plugs but the holes just get bigger or sink down and become an elongated hole in the end.

Have considered trying to drill up and fill with anchor mass and then drill and drive a screw?
Anyone know what to do with these crappy walls?

 

[BirgitS]

Did you use plugs specifically for lightweight concrete? See here: https://www.hornbach.se/projekt/valja-plugg/

 

[famrpk]

Is it plugs specifically for aerated concrete that you've used?

See here:

Is it plugs specifically for aerated concrete that you've used?
See here: [link]

Yes, I can show some pictures of what happens to the wall over time, the picture is without plugs as they didn't help at all, the same happens with nails and everything that's set up, screws and nails just migrate downwards

 

[famrpk]

Don't know why my text didn't come in the reply.

But yes, I have tried plugs of all sorts, but they absolutely make no difference, they come out because the wall just crumbles over time, no neighbors have found a solution either, everything that is put up just falls over time.

 

[BirgitS]

I don't see any plug.
Are you sure it's lightweight concrete?

Addition:
When was the house built?

 

[famrpk]

I don't see any plug.
Are you sure it's lightweight concrete?

Addition:
When was the house built?

I removed the plug because the whole thing came out.

Built in 1954

 

[BirgitS]

The board should have access to some technical documents about how the house was built, and if not, check with the municipality's building permit department.

 

[Rostig_9000i_-88]

In an apartment I lived in before I had the same problem, I vacuumed the hole and filled it in with some Casco husfix and pressed the plug into it.
When it dried, the plug and screw were solid as a rock.

Edit: The house we lived in was built in 1949

 

[famrpk]

Picture of how the väggeb looks; the far wall has something like leca block and lightweight concrete around it. If you run your hand over the concrete, crumbs fall from the wall.

 

[BirgitS]

Picture of how the wall looks, the far wall has like leca blocks and lightweight concrete around it, if you run your hand on the concrete, crumbs fall from the wall

It's probably mortar between the blocks. It's usually inappropriate to try to attach something to the mortar. However, it should be possible to attach something to the leca blocks (if that's what it is).