Mounting TV with an arm on Blue Concrete

[Kenstarfighter]

Hello!

This is probably a non-question, but hope is the last thing to leave, as they say.
The teenager is getting a new room and wants a TV on the wall. Since the room is somewhat limited, I've been considering mounting a TV with an articulated arm.
Now comes the problem: the wall is made of the incredibly bad Blåbetong material, which crumbles more easily than a Kellogg's cornflake.
I've heard of Leka Screws, but would it work with plugs & Leka Screws to mount a 42" TV?
Tips are welcome, but please spare me the idiot explanations

 

[hapazard]

Might be a bit risky to only use the accompanying bracket. But, put a board behind the TV that you screw the bracket into, then you can spread out the load.

 

[Jocke Best]

It can be a bit risky to only use the accompanying bracket. Mem, put a board behind the TV that you screw the bracket into, then you can spread out the load.

Agree. Maybe it's even a good idea to glue a board to the entire wall in question, if it is so small. Then no board is visible, and it holds even better.