Civil Engineering - Estimating and Costing - Discussion
Discussion Forum : Estimating and Costing - Section 2 (Q.No. 8)
8.
A cement concrete road is 1000 m long, 8 m wide and 15 cm thick over the sub-base of 10 cm thick gravel. The box cutting in road crust is
Discussion:
42 comments Page 2 of 5.
Usman said:
9 years ago
The road is 1000m long = 1000m.
The width is 8m = 8m.
The thickness of slab = 0.15m.
Excavation for sub base (10cm thick - 6.25cm compaction) = 3.75cm for gravel.
So,
1000m x 8m x (0.15m + .0375m).
1000m x 8m x 0.1875m = 1500 cubic m.
The width is 8m = 8m.
The thickness of slab = 0.15m.
Excavation for sub base (10cm thick - 6.25cm compaction) = 3.75cm for gravel.
So,
1000m x 8m x (0.15m + .0375m).
1000m x 8m x 0.1875m = 1500 cubic m.
(1)
Akash Singh said:
5 years ago
Original volume= 1000*8*(15+10) = 2000m3.
Cut off volume= 1/4 * 2000 = 500m3.
Box cutting=2000-500= 1500m3.
Cut off volume= 1/4 * 2000 = 500m3.
Box cutting=2000-500= 1500m3.
(1)
Vinod said:
7 years ago
What is 6.25?
Bipin said:
7 years ago
Box cutting in road crust= 1000 * 8 * (0.15+0.10).
= 2000m^3.
= 2000m^3.
Sonali said:
7 years ago
I think the answer is 2000m3 is correct.
Burhan said:
7 years ago
@Rishabh.
Why you divide 2000 by 4?
Why you divide 2000 by 4?
Vivek Arya said:
6 years ago
Orginal volume = 1000m * 8m * (15cm+10cm),
= 1000 * 8 * 0.25cum,
= 2000 cum.
Cutt-off volume = (1/4) * original volume.
= (1/4) * 2000cum,
= 500cum.
So, Box cutting in road curst = (2000-500).
= 1500cum.
= 1000 * 8 * 0.25cum,
= 2000 cum.
Cutt-off volume = (1/4) * original volume.
= (1/4) * 2000cum,
= 500cum.
So, Box cutting in road curst = (2000-500).
= 1500cum.
Navjot said:
7 years ago
Original volume= as you know = 2000.
Cutt off volume= 1/4 of the original volume.
1/4x2000 = 500cum.
So, box cutting in road = 2000 - 500 = 1500 cum.
Cutt off volume= 1/4 of the original volume.
1/4x2000 = 500cum.
So, box cutting in road = 2000 - 500 = 1500 cum.
Sumit said:
7 years ago
How 6.25 cm?
Bond said:
7 years ago
Sub base =10 cm.
And we take base = to or less than about sub base = 10 cm. Total depth of cutting = 20 cm. Therefore, V cutting = 1000 x 8 x .2= 1600m3.
We excavate less than 1600 so the nearest option is 1500. So correct answer is 1500 m3.
And we take base = to or less than about sub base = 10 cm. Total depth of cutting = 20 cm. Therefore, V cutting = 1000 x 8 x .2= 1600m3.
We excavate less than 1600 so the nearest option is 1500. So correct answer is 1500 m3.
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