Classification of brick

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Classification of Bricks
The bricks can broadly be divided into two categories:
1. Unburnt Bricks: The unburnt or sun dried bricks are dried with the help of heat received from sun after the process of moulding. These bricks can only be used in the construction of temporary and cheap structures. Such bricks should not be used at places exposed to heavy rains.
2. Burnt Bricks: These are classified in four categories:
  1. First Class Bricks
    • These bricks are table-moulded and of standard shape and they are burnt in kilns.
    • The surfaces and edges of the bricks are sharp square smooth and straight.
    • First class bricks have all qualities of good bricks.
    • These bricks are used for superior work of permanent nature.
  2. Second Class Bricks
    • These bricks are ground moulded and they are burnt in kilns.
    • The surface of these bricks is somewhat rough and shape is also slightly irregular.
    • These bricks are commonly used at places where bricks work is to be provided with a coat of plaster.
  3. Third Class Bricks
    • These are ground moulded and they are burnt in clamps.
    • These bricks are not hard and they have rough surface with irregular and distorted edges.
    • These bricks gives dull sound when struck together.
    • They are used for unimportant and temporary structures.

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