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Hi,
I have two types of fire bricks (got them for free some years ago way before the eager for a wfo) . First one with density 2.65 g/cm3 (unknown composition) , 31x110x230 mm which is really smooth and the second with density 2.35 g/cm3 (52% Al2O3, likely 1.4-1.5 W/mK) that is rougher and has a significant number of porosity and micro-cracks in the surface. The latter bricks are arch-bricks and curved like a C. However, they are flat if layed down and 6 cm thick. Gaps between those bricks are 1-2 mm approximately when layed as closed as possible.
I know none of these are ideal (35% Al2O3 and thus lower thermal conductivity), but if possible, I would like to use one as a 36 inch cooking floor since I have them already. Fire bricks in Sweden are $3-4 a piece plus shipping.
The first bricks would be layed double for adequate mass.
How would you prioritize? Smooth floor with higher thermal conductivity or rougher with less?
I plan too cook both pizza and bread, just to complicate things...
I have two types of fire bricks (got them for free some years ago way before the eager for a wfo) . First one with density 2.65 g/cm3 (unknown composition) , 31x110x230 mm which is really smooth and the second with density 2.35 g/cm3 (52% Al2O3, likely 1.4-1.5 W/mK) that is rougher and has a significant number of porosity and micro-cracks in the surface. The latter bricks are arch-bricks and curved like a C. However, they are flat if layed down and 6 cm thick. Gaps between those bricks are 1-2 mm approximately when layed as closed as possible.
I know none of these are ideal (35% Al2O3 and thus lower thermal conductivity), but if possible, I would like to use one as a 36 inch cooking floor since I have them already. Fire bricks in Sweden are $3-4 a piece plus shipping.
The first bricks would be layed double for adequate mass.
How would you prioritize? Smooth floor with higher thermal conductivity or rougher with less?
I plan too cook both pizza and bread, just to complicate things...