| الملخص | According to the last technical studies of Al-kend hilles clay in Naenava governorate for the manufacture of the building material, clay sample K3S4 (which contain Quartz, Calcite, Feldspar, Montmorillonite, Kaolinite and Palygorskite) from the same area was used to spot suitability to prepare light weight tiles by adding various type of combustible materials to clay samples (rice husk ash, saw dust, poly styrene, and betmous) in different percentages. Experimental samples were pressed in a mold dimension (5*5*10) cm at (250) Kg/cm2, and then dried all samples, fired at temperature (1050)˚C, exception the polystyrene samples were fired at (1075) ˚C, according to certain firing program (5) ˚C/min, socking time (1) hour). The results indicated the best physical and thermal conductivity properties were obtained by adding rice husk ash with betmous BR1 and BR2, in comparison with ordinary tiles, producing low density tiles (1.15) and (1.17) g/cm3, modulus of rupture (1.50, 1.85) MN/m2 and thermal conductivity (0.551, 0.607) W/m.°C. | ar |
