4.3. Bricks characterization
During firing process, changes of mass dimensions and colour
variations occurs into the bricks samples. It was observed that
the bricks became darker, iron content gives red colour to the
bricks after firing due to iron content in clayed materials, more iron
has the clay, more ‘‘red-dark’’ is the brick obtained ( Different technological properties of the biomass
waste containing bricks compared to the standard (only clay mixture)
are reported in Table 3.