after calcination (1100 C, 2 h) are reported in Table 1. These
agricultural residues show low amounts of SiO2 and Al2O3, main
oxides of traditional ceramic bricks body and high loss of ignition
(LoI) due to the organic compounds. Besides, high values of heating
value, comparable to those characteristics of different kind of
biomass, as reported by (Gravalos et al., 2010), have been experimentally
determined. This fact oriented the research to use these
biomass as pore forming agent mixed with virgin raw materials.