Unsure about wall materials

[creepwood]

I live in an apartment building and I have an interior wall that I am unsure of what type of material it is. The landlord didn't know, but when I drill into the wall, a fairly fine dark gray powder comes out

It's quite easy to drill and I have a faint memory that I could push through one of these drywall hooks The wall was not hollow inside so the hook did not work

The purpose of identifying is to find out what load capacity the wall has.

Edit: The house was built in 1960-1961 in Gothenburg

 

[fahlis]

Lättbetong?

 

[Stefan N]

Yes, probably lightweight concrete. Could be slaggplattor as well but less likely.

 

[slacker]

Agree with others - Lättbetong.
When I hang heavy items, e.g., kitchen in lättbetong, I use Essve Nylonplugg NL 8x65 (Dark grey-blue plug) with a 6mm coarse-thread wood screw about 70-80mm.


I avoid drilling with the hammer drill as I find the holes become larger, so I use the battery-powered drill and tile bit like these:



Bites well!

 

[creepwood]

Agree with others - Lightweight concrete.
When I hang heavy items, e.g. kitchen in lightweight concrete, I use Essve Nylon plug NL 8x65 (Dark gray-blue plug) with 6mm coarse threaded wood screw about 70-80mm.

I avoid drilling with a hammer drill as I think the holes get bigger, so I use a battery machine and tile drill like these:

They work well!

Thank you very much for all the answers, now I feel a bit more confident.
I have a lot of UX plugs from fischer, which I think would work well too. I read in their pdf about loads. Can you trust that it's accurate even though the wall is probably from when the house was built?