The 10 Qualities of Good Bricks
- Bricks Should have given perfect edges, must be adequately burnt, should be uniform color either Red or Copper, and should free from cracks.
- Bricks should have a rectangular plane surface with parallel sides and sharp right-angled edges. The size of a standard brick is 190mm x 90mm x 90mm.
- It should be hard enough and while scratching on bricks with our fingernails, it has no impression left on its surface.
- Bricks should not break while falling from the 1m height.
- Bricks should not more than 20% up to 12.5 class and not more than 15% for a higher grade of absorption of water by their weight.
- Bricks will produce a ringing sound while hitting each other.
- Bricks should be a homogeneous material and well compacted.
- Bricks should free from efflorescence deposits.
- Bricks should have less thermal conductivity and must be soundproof.
- Brick should have a minimum crushing strength of 3.5 N/mm².
Classification Of Bricks
Bricks are classified into two categories by their manufacturing terms:-
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| Burnt Bricks |
Burnt bricks are widely used in Civil Engineering for Building constructions. It is classified under four categories by its qualities. They are,
- First-class Bricks,
- Second-class Bricks,
- Third-class Bricks,
- Fourth-class Bricks.
Un-burnt bricks or Sun-dried bricks also called Katcha bricks, These bricks are dried directly by sunlight after the process of De-moulding. These bricks are not encouraged to use in exposed conditions to the weather. Mostly for heavy rains. These bricks are menial in quality. So, its recommends for temporary buildings or structures.
Classification Of Common Clay Burnt Bricks As per Indian Standards.
TESTS ON BRICKS
Before recommending bricks for construction work, ensuring the Class Designation as per IS code and confirming the suitability of bricks by conducting the following tests:
- Compressive Strength Test
- Water Absorption Test
- Efflorescence Test
- Dimensional Tolerance Test
- Hardness Test
- Soundness Test
- Structure Test



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