Development of Low Bulk Density Fireclay Insulation Brick

The present study deals with the development of low bulk density 0.54 to 0.88 g/cc, high cold crushing strength 8.95 to 79.97 kg/cm2 insulation brick using low cost raw materials. In the present study river silt is used as low cost raw materials in the insulation brick formulation. Effect of plastic clay to silt ratio on the proportion of insulation brick has been studied, and attempt has also be made to study the effect of pore former, firing temperature and calcined clay on the properties of insulation brick. The study suggest that incorporation of river silt enhance the strength of brick while keeping the apparent porosity unaltered at a low firing temperature 10500C