Civil Engineering - Building Materials - Discussion

A major constituent in brick earth is silica, and alumina also plays an important role, but in the question specific property or function is not mentioned. So the correct answer is silica.

The major Constituents of good brick earth work is Silica or Alumina.

Alumina plays a major role in brick. It acts as a cementing material in raw brick. Brick clay is plastic due to the presence of alumina. This plasticity ensures that bricks can be molded. An excess amount of alumina in clay may cause the bricks to shrink, warp, or crack on drying and burning as any other cementing material. The Percentage content of the brick does not make the brick the main constituent. Alumina is the main constituent of every kind of clay. The only thing that matters is function or role similarly. So, here alumina is correct.

Silica is 50 to 60% and more than alumina, but the main constituent is alumina because alumina gives the binding property.

Alumina is the correct answer.

Because here gave plasticity while the answer is based on property.

Silica is the main constituent, as it's percentage is maximum (50-60%) in brick earth.

Silica is right as its amounts 50-60%.

The Percentage content of brick does not make the brick as the main constituent. The only thing that matters is function or role similarly. Alumina plays a major role in brick as mentioned by most of the guys above. So, alumina is the best answer.

Silica is the main constituent of brick.

In case of ingredient, it is alumina and in the case of a constituent, it is Silica.