hi,
I am forming up a large slab of concrete which will be used as a mantle. I will then cement sandstone as the finished product. I wanted to find out whether there is any additive that I can add to the concrete so that it is not affected by the heat. I want to avoid cracking !
thanks !
You can use fired aggregate.
"avp27" wrote
Sounds dodgy to me! With all that heat I would expect it to go with a bang. Any rebar going in there?
Phil
Yep. 13mm rebar. Its a bit over the top but its all I had in the shed... Still sounds dodgy ?
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