Nothing slows the build of a pizza oven down as being sent abroad for a year, but I'm back at it.
I poured the concrete for the hearth yesterday, as in pic one.
The two vertical poles (that will get shortened eventually) are to hold up the metal oven face and the brace that should support the hood (which will be regular bricks, like the rest of the enclosure) as in pic two.
But my main problem remains a the same as Fagilia: bricks with a low thermal conductivity are nowhere to be found.
So I decided to build my soldier course on top of the same, medium duty firebricks but leave the middle open so I can experiment with different kinds of bricks and materials, as in pic three.
The first thing I want to try, like Fagilia and kiwipete, is terracotta tiles. They're plentiful and cheap around here, these for instance are just around the corner: http://www.kapaza.be/nl/vloeren-en-tegels/oude-antieke-rode-tegels---terracotta-tegels-81977854.htm
The thing I need to figure out is how to make them into a heat sink, as it stands they're about 15 mm thick, and I'm guessing that won't be enough mass.
So, do I do several layers, but then how do I bond them together? Or are there other options?