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How to Know about Brick quality?

Density, Weight, absorption, pore structure, thermal characteristic, moisture movement to be quality bricks.Brick quality are classified as follows.

First Class Bricks:

  1. plain surface,sharp edges,sizes with tolerance in Dimensions.
  2. Uniform Red or Brownish coloured.
  3. High compressive strength, not less than 10.7N/mm2.
  4. Machine Moulded.
  5. Efflorescence-Nil.
  6. Water absorbtion less than 15%.
Uses:

They are used for the exterior wall bricks works, sort colours and arches.

According to Indian standard Bricks classification.

ISO 1007: 1992.

Second class Bricks

  1. Slightly uneven faces and edges with tolerance in Dimensions.
  2. Uniform coloured but may be slightly over burnt.
  3. High crushing strength not less than 7N/mm2.
  4. Hand moulded.
  5. Efflorescence-little.
  6. Water absorbtion less than 20%
Uses:

They are used for internal walls and compound walls.

Third Class Bricks:

  1. May be distorted with blunt edges.
  2. Over burnt or under burnt and non uniform colour.
  3. High crushing strength not less than 3.5N/mm2.
  4. Hand moulded.
  5. Efflorescence-Large.
  6. Water absorbtion less than 25%.
Uses:

They are used for flouring, paving, small Brick foundation and brick hat lime concrete(B.B.L.C).