Composition of Bricks:

1. Silica (50-60%):

➤ Silica prevents the cracking, shrinkage and warping of the bricks, thereby imparts uniform shape to it.

➤ if it is in excess, it destroys cohesion between the particles, hence bricks become too brittle.

2. Alumina (20-30%):

➤ Alumina impacts plasticity to the brick earth so that it can be easily moulded in any designed shape.

➤ If it is in excess, it causes shrinkage and warping during the drying of the bricks and makes the bricks too hard during the working process.

3. Lime (4-5%):

➤Lime also prevents the shrinkage of the bricks

➤ If it is in excess, it causes the brick to melt during the burning thereby it results in loss of the shape of bricks.

4. Oxides of Iron (5-6%)

➤ Oxides of iron help silica and lime to fuse with each other, hence leads to the development of strength in the bricks

➤ It also imparts reddish brown colour in bricks.

5. Magnesia (1%):

➤ Magnesia also prevents the shrinkage in bricks and imparts yellowish tint in bricks.

see more topic 👇

Size and Weight of Bricks.

composition of bricks.

harmful ingredients in bricks.

classification of bricks.

Brick Manufacturing.

Testing of Brick.

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