Classification of Bricks
2021-11-22u2002·u2002Silica ( 65-75 Percent) and alumina (25-35 Percent) are the two main constituents of Fire Clay. They are free from impurities like oxides of calcium, magnesium and iron. The maximum permissible upper limit for all such impurities is 5 Percent. These are manufactured in a manner similar to the common building Brick.
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