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Re: concrete for hearth slab

From the WFO board

Posted by Jon

In Reply to: concrete for hearth slab posted by ken

I just built a pizza oven completely from concrete. Concrete does not do well with fire so I think it works best if you keep fire from coming in contact with the concrete by lining the fire box with granite, heavy Mexican style clay tile, or some sort of stone slab. The same goes for the area above the fire. Use plenty of rebar in the slab too. In fact, use rebar everywhere you don't want the concrete to crack.

Quickrete is fine, but if you are going to do very much - it seemed I mixed dozens of loads - buy a bag of Portland Cement (around $7 or $8 here in the states)and a load of gravel and sand. Directions are on the back of the bag. it's cheaper.

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