Re: Refractory bricks for the oven floor
Posted by Rado (211.29.202.112) 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 castable domes cost 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. 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
Strenght - 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