The major role in bricks composition is done by aluminium because it provides plasticity none of the other compounds can do so.

Plasticity in Brick Moulding

Plasticity is the property of a material to be moulded into different shapes without breaking. In brick manufacturing, plasticity plays a crucial role in moulding the bricks into suitable shapes. The plasticity of bricks is contributed by various materials, including alumina, lime, magnesia, and silica. However, the primary material that contributes to the plasticity of bricks is alumina.

Alumina

Alumina is a chemical compound of aluminum and oxygen. It is a white or off-white powder with a high melting point and hardness. In brick manufacturing, alumina is added to the clay mixture to increase its plasticity. The alumina particles act as a binding agent, holding the clay particles together, and allowing it to be moulded into different shapes.

The process of adding alumina to the clay mixture is known as tempering. During this process, the clay mixture is mixed with water and alumina, and then kneaded to form a homogeneous mass. The addition of alumina to the clay mixture also increases the strength and durability of the bricks.

Other Materials

Apart from alumina, lime, magnesia, and silica also contribute to the plasticity of bricks. Lime is added to the clay mixture to increase its plasticity and reduce shrinkage during the drying process. Magnesia is added to the clay mixture to increase the refractory properties of the bricks. Silica is added to the clay mixture to increase the hardness and durability of the bricks.

Conclusion

In conclusion, the plasticity of bricks is a crucial property that allows them to be moulded into different shapes. Alumina is the primary material that contributes to the plasticity of bricks. The addition of alumina to the clay mixture increases the binding properties of the clay particles, allowing them to be moulded into different shapes. Other materials such as lime, magnesia, and silica also contribute to the plasticity and properties of bricks.

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