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Daily Concept Booster Civil Engineering : Ingredients & Their Function in a Good Brick Earth

Percentage of various ingredient in a good brick earth with their function is as follow:

S. no. Raw Material Function
1. Silica (50-60) % Imparts strength, hardness and uniform shape and size.
2. Alumina (20-30) % Imparts plasticity to brick.
3. Lime (<5%) Help in fusion of materials and binding particles together.
4. Iron oxide (5-6%) Imparts red color and improves impermeability and durability.
5. Magnesia (<1%) Imparts yellow tint to bricks and decrease shrinkage.

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