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Building Materials - Engineering

Q1:

Clay and silt content in a good brick earth must be at least

A 50%

B 40%

C 30%

D 25%

E 20%

ANS:A - 50%

Guys given Ans. [A] is Correct.

Clay or Alumina Content 20-30%.
Silt Content -30%.
Sand or Silica Content - 35 to 50%.

In Question Asking about Clay and silt content that means Clay + Silt Which is equal to 50%.