What is the harmful effect of presents of alkali in brick earth on bricks?(a) Discolourises bricks(b) Efflorescence(c) Porous bricks(d) FlakingI had been asked this question in quiz.I'm obligated to ask this question of Composition of Good Brick Earth in chapter Materials for Construction of Basic Civil Engineering

What is the harmful effect of presents of alkali in brick earth on bri

1.	What is the harmful effect of presents of alkali in brick earth on bricks?(a) Discolourises bricks(b) Efflorescence(c) Porous bricks(d) FlakingI had been asked this question in quiz.I'm obligated to ask this question of Composition of Good Brick Earth in chapter Materials for Construction of Basic Civil Engineering
Answer» The correct answer is (b) Efflorescence The explanation is: ALKALI EXISTS in the form of soda and potash.Alkalis ABSORB moisture and with a passage of time, it gets evaporated, leaving white powdery DEPOSITS CALLED efflorescence.

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