Optimization of the composite brick composed of expanded polystyrene and pumice blocks

► The thickness of the composite brick made of EPS and pumice blocks was optimized. ► The optimization was conducted to the minimum brick weight and thermal conductivity. ► Thermal conductivity was measured considering cold surface temperature increase. ► In this study CATIA V5 R19 and ANYSIS Workbench simulation software were used. ► In conclusion, the thicknesses of EPS and Pumice are 40 mm and 20 mm, respectively.