Civil Engineering - Concrete Technology - Discussion
Discussion Forum : Concrete Technology - Section 3 (Q.No. 36)
36.
Pick up the incorrect statemnt from the following. For performing compressive strength test of cement
cement and standard sand mortar are used in the ratio of 1 : 3
water is added at the rate of 
+ 3.0 percentage of water where P is the percentage of water for standard consistency
+ 3.0 percentage of water where P is the percentage of water for standard consistencyA cube mould of 10 cm x 10 cm x 10 cm is used
The perpared moulds are kept in a atmosphere of 90% relative humidity
The temperature of water in the submerged tank for curing moulds, should be 27° ± 2°C.
Discussion:
36 comments Page 1 of 4.
Pramod jaiswal said:
5 years ago
For compressive strength of cement:
Cement sand mortar ratio 1:3.
Cube size 70.6cm.
Relative humidity 90%.
Temp 27*2.
Water is added at the rate of + 3.0 percentage of water where P is the percentage of water for standard consistency.
Ref: R.S. KHURMI.
Cement sand mortar ratio 1:3.
Cube size 70.6cm.
Relative humidity 90%.
Temp 27*2.
Water is added at the rate of + 3.0 percentage of water where P is the percentage of water for standard consistency.
Ref: R.S. KHURMI.
(3)
Sunil said:
3 years ago
As per RS Khurmi. Conventional and Objectives type.
1:3 is correct to determine the compressive strength of the cube and it is kept in an atmosphere of at least 90% relative humidity for 24 hrs.
1:3 is correct to determine the compressive strength of the cube and it is kept in an atmosphere of at least 90% relative humidity for 24 hrs.
(4)
Suraj shrestha said:
8 years ago
We use M15 grade or greater concrete .(ie we can't use 1:3 ratio .its use for M10)
And we can use 15*15*15 /10*10*10 cube.
So, option A Is incorrect.
And we can use 15*15*15 /10*10*10 cube.
So, option A Is incorrect.
Wassi said:
7 years ago
D is in correct, but yes concrete is tested in 10*10*10 mould but compressive strength of 10*10*10 is more than stand design concrete.
NISHOCH YADAV said:
7 years ago
Here, the question is related to cement not a cement concrete.
So, Ratio = 1:6
size = 70.6mm
temp = 27±2.
So, Ratio = 1:6
size = 70.6mm
temp = 27±2.
Kouahik das said:
6 years ago
Answer C and D, but mould is 76 * 76 *76 mm and Humidity 90% this value as per IS code 456-2000.
Thank you.
Thank you.
Aravind gottumukkala said:
1 decade ago
Absolutely answer is C, The mould is of 7.06*7.06*7.06 (cm) with area of face of the cube being 50 cm^2.
Ankush Rathod said:
4 years ago
Option D and C were wrong. Rest of the think like proportion, temperature and percentage are correct.
(4)
DARSHAN H A said:
9 years ago
At least 90% relative humidity for 24 hours and cube size 7.06cm x7.06cm. Options C and D are wrong.
Sangam said:
7 years ago
This test is done for concrete not for cement. So, The given answer A is the right one.
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