Fireplace concrete ring how can it be repaired

[qvintus4]

Fireplace concrete ring how can it be repaired in the best way is it enough with refractory mortar do you think?? It has started to crack quite a bit from the heat variations ....

 

[rävlyan]

There's nothing that holds, it gets quite warm there, recommendation some new stuff,

 

[Daniel 109]

Concrete rings are not very good for that application. I have seen two iron pipes with sand in between in some places. It withstands the heat.

 

[qvintus4]

Nothing lasts, it gets pretty warm there, recommendation some new stuff,

New stuff?? What then??

 

[qvintus4]

Concrete rings are not particularly good in that application. I have seen two iron pipes with sand in between in some places. It withstands the heat.

Iron pipes ??

 

[Daniel 109]

Yep. Unfortunately, I don't have a picture.

 

[rävlyan]

New things ?? what then ??

Concrete ring with a cast bottom, the ring is placed on the ground with sand underneath, about 15 cm of concrete with some reinforcement arranged in the bottom.

 

[qvintus4]

it's been working since around 2015, it should work a bit longer, how can you build something similar yourself ??

 

[rävlyan]

The one you are showing is a förmiskningsring that is usually placed on well rings so it doesn't become too large at the top, simply such one, available in different sizes. Turn it upside down, then cast the bottom as you want it, quite a simple construction. Of course it costs, but there is reinforcement in it so it should probably last a few years. It is the heat that breaks it.

 

[Daniel 109]

It is probably better not to have a dense bottom.

 

[qvintus4]

It is cast at the bottom