Civil Engineering - Concrete Technology - Discussion
Discussion Forum : Concrete Technology - Section 4 (Q.No. 15)
15.
Sand requiring a high water cement ratio, belongs to
Discussion:
31 comments Page 1 of 4.
Ram said:
3 years ago
Zone 4 is required more w/c ratio. Beacuse zone 4 is more finer than zone 1. And fine sand more surface area and more surface are more required w/c.
(11)
Sultan said:
7 years ago
Zone 1.
It is asked about w/c ratio, not about only water. Zone 1 sands are coarser so they have the comparatively lesser surface area, so they require a lesser amount of cement hence higher w/c ratio.
It is asked about w/c ratio, not about only water. Zone 1 sands are coarser so they have the comparatively lesser surface area, so they require a lesser amount of cement hence higher w/c ratio.
(4)
Vijay reddy m patil said:
3 years ago
Zone 4 requires high water cement ratio because in fine sand fineness increases, surface area also increases.
(3)
Rakesh roushan said:
4 years ago
@All,
Here, the question is not talking about water it's is taking about ratio if water is increased cement will also increase in zone 4 so it's experimental that zone 1 requires less w/c ratio.
Here, the question is not talking about water it's is taking about ratio if water is increased cement will also increase in zone 4 so it's experimental that zone 1 requires less w/c ratio.
(2)
Waleed said:
5 years ago
The answer must be (d) because zone 4 contains fine sand grading and therefore it has a large surface area and required more paste to fill up these voids.
(2)
Agha Bilal said:
6 months ago
From zone-I to zone-IV, fineness is increasing. So specific surface area (SSA) increases. As SSA increases it requires more water for surface coating.
So, w/c ratio increases from zone I to IV.
Hence, the correct option is (D).
So, w/c ratio increases from zone I to IV.
Hence, the correct option is (D).
(1)
Sudheer rawat said:
6 years ago
Answer must be D because finer sand has more surface area to coarse sand. And more surface area needs more water to lubricate. So the correct answer is D.
(1)
Rajau das said:
6 years ago
Fine sand bulking is large. So the answer is Zone-4.
(1)
Viru kapoor said:
7 years ago
Yeah;
It is zone 4. Because of more surface area.
It is zone 4. Because of more surface area.
Haidar Ullah said:
7 months ago
The correct answer is Zone IV.
As per the Indian Standard (IS) 383, the zones for sand are classified based on the fineness modulus, which is a measure of the sand's gradation.
Zone IV corresponds to very coarse sand, which typically requires a higher water-cement ratio.
As per the Indian Standard (IS) 383, the zones for sand are classified based on the fineness modulus, which is a measure of the sand's gradation.
Zone IV corresponds to very coarse sand, which typically requires a higher water-cement ratio.
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