related to utilisation of technical plants for the processing and dosing of the pore-forming agents, suction extraction units for gases, costs for the pore-forming agents [11]. Furthermore, as a consequence of burning out pore-forming agents, the local temperature in clay body often increases leading to a decrease in the pores with small volume that precisely represents the essential factor for improving the thermal insulation [11]. In this experimental investigation, albite floatation waste was used as a pore-forming agent and different LECA granules were produced from two different clays at different firing temperatures ranged between 900 to 1250 °C. The effects of clay properties, amount of pore-forming agent, and level of firing temperature on the physical and microstructural properties of LECA granules were examined.