Abstract: The proposed study involves the experimental investigation of effect of fly ash and rice husk ash on the properties of burnt clay bricks. Determination of properties of the bricks casted with varying proportions of admixtures is taken up to ascertain whether the admixtures can be used for the production of clay bricks. On seeing the present day demand for bricks, an attempt is made to study the behavior of bricks manufactured using, different waste materials like rice husk ash and fly ash The main aim of this research was to compare the compressive strength of the bricks, so for this purpose different percentage of materials were separately added 5%, 10%, 15%, 20% and 25% by weight and then the compressive strength of the bricks was established, and then with the help of graph a comparison between compressive strength of bricks, made out of clay, Fly Ash, Rice husk ash and combination of all these was determined.