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Civil Engineering - Building Materials - Discussion

Discussion Forum : Building Materials - Section 2 (Q.No. 20)
Building Materials
20.
A good brick earth should contain :
about 20% to 30% of alumina
about 50% to 60% of silica
not more than 5% of lime
about 5 to 6% of oxide of lime
All the above.
Answer: Option
Explanation:
No answer description is available. Let's discuss.
Discussion:
6 comments Page 1 of 1.
Hossayn Fedayi said:   4 years ago
Normally, bricks contain the following ingredients:


Silica (sand) : 50% to 60% by weight.
Alumina (clay) : 20% to 30% by weight.
Lime : 2 to 5% by weight.
Iron oxide : 7% by weight.
Magnesia : Less than 1% by weight.
(2)
Dews said:   4 years ago
@Gaurav.

Super. Thanks.
Gaurav said:   6 years ago
Brick CONSTITUENT- (TRICK).

SALIM.

S- SILICA.
A-ALUMINA.
L-LIME.
I-IRON OXIDE.
M-MAGNISIUM OXIDE.
(1)
Rukhsar Ghani said:   7 years ago
Option D) 5-6%oxide iron is the correct answer.
Shivam said:   7 years ago
Yes, Right @Jitesh Gakhare.
Jitesh Gakhare said:   7 years ago
In option D, it should be Oxide of iron not an oxide of lime.
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