How to check quality of Bricks?

Brick is a very common building material which is used for constructing both

  1. Partition wall
  2. Load bearing wall&l

    Brick is a very common building material which is used for constructing both

    1. Partition wall
    2. Load bearing wall

    Method 1:- Good quality bricks lead to the proper strength of the structure . A good quality brick Should have following properties :

    1. The brick should be rectangular in size with sharp edges to have a good joint in a masonry wall.

    Bricks are of two sizes ;

    • Modular bricks : 19cm *9cm * 9cm (actual size )
    • Non modular size : 20 cm* 10 cm* 10 cm ( commonly used; size of bricks with mortar )
    1. When two bricks are striked against each other it Should produce clear ringing sound. This brick is known to have sufficient soundness and without crack.
    2. When a brick is dropped from certain height of 1m on a levelled surface it shouldn't be broken down in to pieces which depicts the toughness of the brick.
    3. When a scratch is made on the surface of the brick ; any impression on the nail shouldn’t be produced.
    4. Minimum strength of the brick used in construction work should be 3.5 N/mm^2
    5. A first class brick should have water absorption is less than 20% otherwise it will absorb water from mortar causes crack in it.
    6. A good quality brick should be of high temperature resistance. According to this properties;
    • Heavy duty brick : 1450°C - 1650°C
    • Medium duty brick : 1000°C - 1400°C
    • Low duty brick : 850°C .

    The bricks may contain harmful ingredients like alkalies, excess magnesia and excess lime. To know these values we have to do lab tests.

    Method 2:- Checking the quality of bricks is very important. If the brick is not of a good quality, The building’s life cannot be guaranteed.
    Coming to the question, The method of checking quality of bricks :
    1)Perfect rectangular shape of bricks
    2)Drop(not throw) the brick from exactly 22.4 m (at STP) to ground at a place where the acceleration due to gravity is 9.84 m/s/s.(at 20deg Latitude).
    3) If it breaks , then see how many broken pieces are there. If it is less than or equal to 5, then good quality. between 5 and 7, medium quality. more than 7 means, your life in that building is not guaranteed. :: (No guarantee nanana no guarantee … song).