What is this type of brick? (red on the surface, black inside)

[ulfben]

The person who built the house made the entirely reasonable decision to brick and/or cast a washing machine pedestal, which I now have the great pleasure of trying to demolish.



For some reason, it's impossible to detach the stones - the joint is so hard that the brick turns to powder long before the joint releases.



As you can see in the second picture, the stones are completely black in the middle. I thought brick was a homogeneous material, the same color of clay all the way through. Does anyone know what kind of brick I'm dealing with here?

(If you have tips to simplify the demolition, they are also gratefully received. A hammer drill with a chisel has worked so-so. Today I'm thinking of buying a stone blade for the reciprocating saw and testing if it's possible to slice the cube a bit.)

 

[Stefan N]

You won't get anywhere with a tigersåg, liten bilmaskin if you're weak and can't handle the bilmejseln you already have.

 

[jonaserik]

As said, rent a smaller demolition machine. The bricks seem hard-fired, perhaps an old chimney that has been demolished as it is black. Good luck, just keep gnawing away, the last stone will be removed too.

 

[ulfben]

To clarify; it's not black on the surface. It looks like regular red bricks until it's split. The inside is black all the way through.

 

[jonaserik]

The one with black TJA, it doesn't matter, it will be removed and become small pieces, just more to clean up.