(1994) Industrial Minerals and rocks, 6th Edition, Pergamon Press, Oxford. The Nature properties of soil, 20th Edition and Pub Prentice-Hall Inc.

(1999) Investigation on local refractory materials for high temperature applications, PhD Thesis mech.ДЇederal University Of Technology, Minna 4. An investigation on the properties of termite hill as refractory material for furnace lining: Indian Foundry Journal. This 40% sawdust addition was discovered to be the maximum under which mechanical strength and other refractory properties of clay will remain stable.ДЄgha O A (1998) Testing of local refractory clay for producing furnace lining bricks. While thermal conductivity averaged 0.493W/mo k with 0% saw dust and 0.134W/mo k with 40% saw dust thereby improving their insulating properties. Apparent porosity averaged 13% with 0% saw dust and 17% with 40% addition of saw dust bringing them closer to the acceptable range of 20-80%. Solid density averaged 3.18g/cm3 with 0% saw dust and 2.91g/cm 3 with 40% saw dust, still bringing them closer to the international range of 2.3-3.5g/cm3.

The results showed that the linear shrinkage improved from an average of 8.57% for the three samples for 0% sawdust to an average of 8.32% with 40% addition of saw dust, bringing them closer to the lower range of the international standard of 7-10%. The Effects Of Sawdust Addition On The Insulating Characteristics Of Clays From The Federal Capital Territory Of Abuja Abstract: l Capital of Abuja like linear shrinkage, solid density, apparent porosity and thermal conductivity were characterized with a view of studying the effect of sawdust on them.

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