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

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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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