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Civil Engineering - UPSC Civil Service Exam Questions - Discussion

Discussion Forum : UPSC Civil Service Exam Questions - Section 20 (Q.No. 45)
UPSC Civil Service Exam Questions
45.
Which one of the following is the correct statement ?
Smaller size of aggregates in a concrete mix :
provides larger surface area for bonding with the mortar matrix which increases the compressive strength and reduces the stress concentration at the mortar-aggregate interface
is economical as the concrete mix is more dense
requires lesser cement for a particular water-cement ratio and hence is economical
is beneficial as these aggregates can pass through the reinforcement bars more easily
Answer: Option
Explanation:
No answer description is available. Let's discuss.
Discussion:
3 comments Page 1 of 1.
Sadashiva said:   7 years ago
The Answer should be A.

Larger size of aggregate is more workable than the smaller size of aggregate because, smaller size aggregate requires more quantity of water for lubrication however, the smaller size aggregates provides large surface area for bonding with the mortar matrix. Which increases the compressive strength and reduces the stress concentration in the mortar- aggregate interface.
Chhaya said:   8 years ago
I think D is also a right option.
(1)
Uttam said:   8 years ago
Yes, the answer should be D.
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