Which ingredient in excess can make the brick brittle?

Q. Which ingredient in excess can make the brick brittle?

A

Alumina

B

Lime

C

silica

D

Iron oxide

Solution:

Silica is the major content in the brick which prevent shrinkage, warping and cracking.
Durability depend on the silica content in brick.
If present in excess it reduces the cohesion between the particles and the brick becomes brittle.

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