How to identify good quality bricks

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how to identify good quality bricks

It is essential for you to know how to identify good quality bricks as a person related to the construction industry. Because the quality of the materials always matters in the construction industry to have well-finished products, both structurally and architecturally ways.

First of all, let’s see what is a brick? When it’s come to building construction, there are several types of materials that are using to build walls and other related elements. Such as

  • Common Bricks
  • Cement Blocks
  • Concrete Blocks
  • Engineering Bricks
  • Earth compressed, Bricks, etc.

In this article, we are discussing common bricks and how you could identify good quality bricks for construction purposes.

how to identify good quality bricks
Common bricks

As the name implies, the common bricks are using most commonly in the construction industry. These are blocks of tampered clay, moulded to suitable / standard shapes and sizes while it is still in plastic condition, dried in the sun and burnt to make them strong, hard, and durable.

How common bricks are making

Traditionally these bricks are making with “fire clay” or “refractory clay” pressing into moulds and then let it dries in sunlight after that burnt at high temperatures in special kilns. The common bricks can be known as an ancient building material and still in use.

how to identify good quality bricks

Brick Kiln

The usual composition of fire clay is

  • Silica                                              = 56 to 90%
  • Alumina                                         = 2 to 36%
  • Iron Oxide                                     = 2 to 6%
  • Lime, magnesia, potash, and soda   = 8 to 20%

How to identify good quality bricks

There are several methods to identify good quality bricks onsite.

  • Brick should be a rectangular shape with sharp and straight edges to ensure proper bonding in masonry walls.
  • Brick should form into standard sizes.
standard size of a common brick
The standard size of a common brick
  • It should give a clear metallic sound when two bricks strike against each other.
  • When a brick is dropping from 1m height from the ground on to the levelled surface, the Brick should not be broken into pieces.
  • Bricks should be well burnt in kilns and copper colour without any cracks.
  • No impression leaves on surfaces when brick scratch with a nail.
  • When broken into two pieces, the cross-sectional area should have dense, uniform texture without cavities.
  • The water absorption of bricks after 24 hours immersion in cold water should be as given below considering bricks classification.
    1. First Class Bricks – 20% by weight
    2. Second Class Bricks – 22% by weight
    3. Third Class Bricks – 25% by weight


standard sizes of a brick by country
Standard brick sizes by countries

The bricks are using to construct separation walls and also load-bearing walls. There are several bonding types for bricks when building brick walls and brick structures. Main bond types are as follows,

  • Running bond
  • Common bond
  • English bond
  • Flemish bond
  • Stack bond
  • Header bond
  • Sussex bond
  • Monk bond

These bond types used to ensure the stability of the structures and also to distribute the loads throughout the structure with achieving maximum strength. Furthermore, the bonds used to make an architectural appearance to the brick structures.

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