TYPES OF BRICK BASED ON QUALITY

[Sparkle 6]

Types of Bricks Based on Quality:

1. First Class Brick:

The size of these brick is standard. The color of these bricks are uniform yellow or red. It is well burnt, regular texture, uniform shape. The absorption capacity is less than 10%, crushing strength is 280 kg/cm2.

It doesn’t have efflorescence. It emits a metallic sound when struck by similar brick or struck by a hammer. It is free from pebbles, gravels, or organic matters.

It is generally used in a building of long durability, for building exposes to a corrosive environment etc.

2. Second Class Brick: 

The size of this brick is standard & color is uniform yellow or red. It is well burnt, slightly over burnt is acceptable. It has a regular shape; efflorescence is not appreciable. The absorption capacity is more than 10% but less than 15%. Crushing strength is 175 kg/cm². It emits a metallic sound when struck by similar brick or struck by a hammer. It is used for the construction of one-storied buildings, temporary shed when intended durability is more than 15 years.

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3. Third Class Brick:

The shape and size are not regular. The color is soft and light red-colored. It is under burnt, slightly over burnt is acceptable. It has extensive efflorescence. The texture is non-uniform. The absorption capacity is more than 15% but less than 20%. The crushing strength is 140 kg/cm2. It emits a dull or burnt sound when struck by another similar brick. It leaves fingernail expression when one tries to do with the thumbnail