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Which one of the below is the most important ingredient in the brick earth?

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in Basic Civil Engineering by (111k points)
Which one of the below is the most important ingredient in the brick earth?

(a) Alumina

(b) Lime

(c) Silica

(d) Magnesia

This question was posed to me in an interview for job.

Query is from Composition of Good Brick Earth in portion Materials for Construction of Basic Civil Engineering

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Best answer
The correct option is (c) Silica

The best I can explain: The amount of silica present in brick earth is 50-60% and it prevents cracking and warping of raw bricks.

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