CONSTITUENTS OF GOOD BRICKS

Materials used for manufacturing of ‘Bricks'.

There are different constituents that are used to make in the process of manufacturing of bricks.
Materials such as Lime , Alumina, Slica, Magnesia, iron oxide, Alkalies together forms a good brick.
For the remebered in short is called ( SALIMA ).

 Good Quality Brick

The constituents used for making good quality of bricks are explained in details below –

1) LIME - 

PROPORTION - It is about less than 10 %.

FUNCTIONING - Reduces shrinkage on drying.

If it is in excess quantity results in over melt and looses its shape and also changes its colour from red to yellow.


2) ALUMINA -


PROPORTION - It is about 20 to 30 %.

FUNCTIONING - It imparts Plasticity.

Its excess quantity produces crack in bricks on drying.

3) SILICA -

PROPORTION - It is about 50 to 60 %.

FUNCTIONING - 1) Retains its shape and imparts durability.
           
                             2) Prevents shrinkage of warping.

If its proportion is in excess it may results in the formation of brittle quality of bricks.

Brick Wall

4) MAGNESIA -

PROPORTION -  It is about less than 1 % .

FUNCTIONING - Helps in imparting colour upto yellow.

If in excess leads to decay of bricks.

5) IRON OXIDE - 

PROPORTION - It is about less than 7 %.

FUNCTIONING - 1) It gives red colour on burning.

                              2) It also gives strength and hardness.

If it is in excess may cause the colour dark blue or black.

6) ALKALIES - 

PROPORTION - It is about less than 7 %.

FUNCTIONING - This are mainly acts in the form of soda ash.

If in excess may cause efflorescence makes un suitable for bricks.

This are the constituents together forms a Standard good quality brick.


Hope this information will be useful to you all.
Thank You.