Re: Refractory bricks for the oven floor

Posted by Rado on October 27, 2003 at 18:04:27:

In Reply to: Refractory bricks for the oven floor posted by David on October 25, 2003 at 21:48:54:

I think refractory fire bricks lied on 115mm high are the best option for wood oven building, as for the floor or the whole dome. Comparing use of bricks with a refractory concrete, bricks are a bit more expensive but last ages. Commercially produced refractory domes made out of castables cost quite a lot. Made of fire clay, standard refractory bricks with 26% alumina have 1350 degrees Celsius temperature rating.

This temperature can not reached in the wood burning pizza oven, not even close obviously. Bricks are a good investment, and are being traditionally used for many generations which is a good proving test for quality therefore a peace of mind.

26% alumina refractory brick:
Bulk density 1850kg/m3
Strength - compressive 15MPa
Linear change on reheating [to 1400C for 4 hours!] - permanent 0.3%
K-factor / thermal conductivity at 750C 1.05W/m.K
Rupture 5MPa