The Bricks is the most commonly used building material and used for construction walls, columns, roofs, paving floors etc. A good brick may contain 20 to 30 percent of alumina, 50 to 60 percent silica and the remaining constituents are lime, magnesia, sodium, potassium, manganese and iron oxide. The standard brick size is 19cmX9cmX9cm. The specific gravity of bricks is about 2. The number of bricks required for one cubic meter of brick masonry are 550.
Types of Bricks:
The bricks are classified as under;
First Class Bricks:
These bricks are well burnt having smooth and even surface with perfect rectangular shape and uniform reddish color. These bricks should not absorb water more than 20 percent of its own dry weight after 24 hours’ immersion in water. It should have a minimum crushing strength of 10.5 MN/m2.
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Second Class Brick:
These bricks are slight over burnt having rough surface and not perfectly rectangular in shape. These bricks should not absorb water more than 22 percent of its own dry weight after 24 hours of immersion in water.
Third class brick:
These bricks are not properly burnt (under burnt) in the kiln and hence these are soft and can be easily broken. These bricks should not absorb water more than 25 percent of its own dry weight after 24 hours of immersion in water.
These bricks are over burnt with irregular shape. These bricks are dark bluish in color.
I hope that this article will help you in understanding DIFFERENT TYPES OF BRICKS USED IN BUILDING CONSTRUCTION.