Civil Engineering - Estimating and Costing - Discussion

Discussion :: Estimating and Costing - Section 2 (Q.No.1)

1. 

For 100 sq. m cement concrete (1 : 2: 4) 4 cm thick floor, the quantity of cement required, is

[A]. 0.90 m3
[B]. 0.94 m3
[C]. 0.98 m3
[D]. 1.00 m3

Answer: Option B

Explanation:

No answer description available for this question.

Sonu said: (Aug 31, 2013)  
Hi.

Please tell me, How to calculate the Qty of cement 0.940 m^3 ?

Ratul Boruah said: (Sep 23, 2013)  
How to calculate the Qty of cement?

Eng.Raj said: (Sep 24, 2013)  
Generally to calculate the Cement, fine aggregate and coarse aggregate the following method will be followed,

Wet Qty. of concrete = 100 Sqm * 0.04m thickness = 4.00 m^3
To get the dry volume of concrete, generally wet volume of concrete will be multiplied by 150%.

Therefore 4.00 m^3 * 150% = 6.00 m^3.

Cement Qty. = Dry volume of concrete / ( Sum of the ratio values).

= 6.00 /( 1+2+4).
= 0.857 m^3 of Cement i.e.25 No. of bags.

But here they considered 164.5% instead of 150%.

Dry volume of concrete = 4 * 164.5% = 6.58 m^3.

Cement Qty. = 6.58/ (1+2+4) = 0.94 m^3 of Cement i.e. 27.5 bags.

Asadullah Mehsud said: (Apr 24, 2021)  
0.88cum.
Valume of dry cement concreat 100 * .04= 4cum,
Valume of wet concreat =4 * 1.54 = 6.16,
Valume of cement = 1/7 * 6.16 = 0.88cum.

Khld said: (May 16, 2021)  
164.5 is assumed, how?

Khld said: (May 16, 2021)  
. 88 m^3 is the right answer.

Ajay Sharma said: (May 18, 2021)  
(1/7) * 1.54 * 4 = 0.88m^3 = 0.9m^3.

Nasir Waheed said: (Jun 12, 2021)  
0.88 m^3 is the right answer.

Noora S B said: (Jul 1, 2021)  
1.54 is the conversion factor to convert wet to dry mix and additional they take 10% for unevenness & loss. So, total 1.64.

Mjm Gcek said: (Jul 10, 2021)  
The answer is 0.88m^3.

V C Sawathkar said: (Jul 19, 2021)  
For 4cm thick flooring constant of rate analysis is 6.6.
6.6/(1+2+4) = 0.94285,

for 2.5cm thick flooring 4.125.

Mjm Gcek said: (Jul 27, 2021)  
The correct answer is 0.88m3.

Muhammad Tariq said: (Jul 31, 2021)  
The correct answer is 94.
Volume of wet concrete in 4cum.
Volume of dry concrete is=4*1.54( constant),
Total v= 6.61.
Quantity of cement = 1/7 * 6.61 = 0.94.

Deepankar said: (Aug 9, 2021)  
The given answer is correct.

1st total volume=100 * 0.04 =4 m^3.
The volume is increased by 10% due to uneven surface which gives = 4 * 1.1 = 4.4 m^3.
This volume is further increased by 50% for dry volume calculation = 4.4 * 1.5 = 6.6 m^3.
So total volume = 6.6 m^3.
For cement = (6.6 * 1)/(1+2+4) = 0.9428 m^3.

Sahla said: (Oct 17, 2021)  
100 * .04=4cu.m of wet concrete.

To produced 1cu.m of concrete 1.54cu.m of dry concrete required.

1.54 * 4 = 6.16cu.m
6.16/1+2+4 = .88 cu.m of cement reqd.
.88 * 1440 (density of cement)=1267.2 kg.

Or,
1267.2/50kg = 25.34=26 bag of cement.

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