Effect of Additives on the Thermal Conductivity of Clay

This paper reports on the determination of the effect of Additives on the thermal Conductivity of clay. Clay sample was collected from a deposit. The clay sample was cleaned, soaked, dried, crushed and sieved. Various percentages of ashes and sawdust were added. The mixtures were used to form discs of diameter 4.2cm each. Lees' disc apparatus was used to determine the thermal Conductivity of each disc and was found to be 0.25W/mK for no moisture content. The clay sample with sawdust as additive gave the least value of thermal conductivity of (0.06W/m K) than the clay with ashes.