Comparitive Study, Fabrication And Testing Of Insulation Bricks
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Date
2015-12-23T12:57:33Z
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Abstract
The present study deals with the Comparison, Fabrication and Testing of Insulation bricks. Rice
husk is used as an additive along with raw materials such as Kyanite and Bikaner clay. The use
of rice husk decreases the Thermal Conductivity of the brick thereby increasing its application in
high temperature refractories. When the rice husk burns, it opens the pores in the insulation
brick. Thus, the apparent porosity of the insulation brick increases with addition of rice husk.
Also the mass of the bricks reduces. Therefore the Bulk Density decreases. The Cold
Compression Strength reduces as the porosity of the bricks increases. This is due to the inability
of the brick to withstand a greater load at higher temperature. The Permanent Linear Change of
the insulation brick reduces. Insulation bricks usually shrink when heated. By adding rice husk in
adequate proportions, the shrinkage is seen to considerably lessened. The Pyrometric Cone
Equivalent is a test done to check the temperature at which the material softens. Therefore it
determines the softening temperature of the material. The higher the Pyrometric cone equivalent
value, the better is the heat resistance offered by the material. Finally, the Thermal conductivity
of the material reduces. This increases the insulation property of the brick which makes it
suitable to be used in high temperature applications.
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Comparitive Study, Fabrication And Testing Of Insulation Bricks, Abhilash Thakur M, Akhil Rajendran, Melvin Mathew, Sri Vishnu R