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Excess of silica in the clay ______
- AMakes the brick brittle and weak
- BMakes the brick crack and warp on drying
- CChanges the color of the brick from red to yellow
- DImproves the impermeability and durability of the brick
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Silica
Good brick earth should contain 50 – 60% of silica.
It prevents cracking, shrinking and wrapping of raw bricks.
Silica imparts uniform shape to the bricks.
Excess of silica makes the bricks brittle.
Good brick earth should contain 50 – 60% of silica.
It prevents cracking, shrinking and wrapping of raw bricks.
Silica imparts uniform shape to the bricks.
Excess of silica makes the bricks brittle.