How the h-ll is that possible!?

[Acora]

Torn down and knocked off all the plaster and suddenly what I thought looked like Leca appeared. Checked with real professionals in the field and one said Siporex (which I rule out), two masons immediately said Leca, and a concrete technician said Leca but... The house was built in 1940 and in theory, Leca didn't even exist in Sweden then!? Did the builder in the 40s get hold of a time machine? I even knocked down plaster on the outside here and there to rule out that the room was a later extension and suddenly... Leca everywhere.
I would be extremely grateful for input/explanations about this, dear BH friends.

 

[Düsseldorff]

Lightweight clay aggregate has been manufactured in Sweden since the early thirties.

 

[Acora]

Lightweight aggregate has been manufactured in Sweden since the early thirties.

taken. Lightweight aggregate dear child has many names but specifically Leca is what's referred to here. Lightweight concrete doesn't say much either since there are different types, which you probably already know. Leca itself didn't seem to exist in 1940

 

[AG A]

accepted. Lightweight concrete known by many names, but specifically Leca here. Lightweight concrete doesn't say much either as there are different types which you surely already know. Leca specifically didn't seem to exist in 1940

Concrete clinker!
Read about leca on Wikipedia.

 

[Acora]

Concrete tile!
Read about leca on Wikipedia.

The dimensions do not match. Wikipedia is probably not the first place I look for information and facts. Thanks for the answer.

 

[cpalm]

I also immediately thought of concrete block.
But when it comes to which brand it could be, I'm at a loss!

 

[Acora]

I also spontaneously thought of concrete hollow block.
But which brand it could be, I have no idea!

Concrete hollow block was my first thought when the plaster was knocked down, but the blocks are not so solid.

 

[useless]

It looks more like irregular stones than round lecakulor in the picture. Could you chip a bit off one corner and see what it is?

 

[Acora]

It looks more like irregular stones than round lecakulor in the picture. You can knock off a bit in a corner and see what it is?

[image]

I completely agree. Excluded Leca first. I knocked and it's the same composition all the way through.

 

[Sesulo]

That is likely to be a concrete block.

My dad has such a block at home from when their house was built (1940s) that looks identical.

 

[Acora]

That is likely concrete hollow blocks.

My dad has such a block at home from when their house was built (40s) that looks identical.

Two buddies (one an experienced mason) and a concrete technician said Leca but as mentioned... the story doesn't add up. As you say, I was dead sure it was concrete hollow blocks at first, but it doesn't feel like that when you knock and work with the wall. Sometimes angular stones and sometimes balls that crumble and fall.

 

[Daniel 109]

Are the balls porous and break fairly easily?

 

[Acora]

Are the balls porous and break fairly easily?

some do and others don't actually.

 

[Allmänobildad]

Leca has become synonymous with lightweight aggregate due to the over 100 years old patent on expanded clay. Leca did not come to Sweden until the 1960s, but long before that, concrete clinker blocks were manufactured here in Sweden.

There are probably many who would call, for example, Finja's lightweight aggregate blocks precisely lecablock. So don't get hung up on the use of the word leca.

 

[Acora]

There it is! What I suspected, in other words... "a beloved child has..." etc. etc. There's already a 25 mm layer of Gipsputs that's curing as we speak. Big thanks, amigo!