Civil Engineering - Concrete Technology - Discussion

36. 

Pick up the incorrect statemnt from the following. For performing compressive strength test of cement

[A]. cement and standard sand mortar are used in the ratio of 1 : 3
[B]. water is added at the rate of + 3.0 percentage of water where P is the percentage of water for standard consistency
[C]. A cube mould of 10 cm x 10 cm x 10 cm is used
[D]. The perpared moulds are kept in a atmosphere of 50% relative humidity
[E]. The temperature of water in the submerged tank for curing moulds, should be 27° ± 2°C.

Answer: Option A

Explanation:

No answer description available for this question.

Apurba said: (Mar 21, 2014)  
Cube mould size is 70.6mm*70.6mm*70.6mm. So option C is correct.

Aravind Gottumukkala said: (Aug 29, 2014)  
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.

Anooooo said: (Jan 21, 2015)  
90% relative humidity for 24 hours.

Soumya Choudhuru said: (Mar 17, 2015)  
But as per code it is 100% for 24+/-.5hrs.

Darshan H A said: (Jul 4, 2016)  
At least 90% relative humidity for 24 hours and cube size 7.06cm x7.06cm. Options C and D are wrong.

Adnan said: (Jul 26, 2016)  
Option C and D are incorrect.

Abhishek Nandi said: (Sep 10, 2016)  
Only option C is incorrect.

Bishal said: (Oct 4, 2016)  
I too think the Option C and D is incorrect.

Shubham Umak said: (Mar 22, 2017)  
Yes, option C and D is incorrect. I too agree @Bishal.

Ravi said: (Mar 25, 2017)  
Yes, C and D are incorrect option.

Dibya said: (Apr 17, 2017)  
I also agree C and D.

But how the answer A is correct? Anybody explain.

Mathi said: (Jul 7, 2017)  
Actually, the proper mix ratio is 1:3.

Bunty said: (Aug 4, 2017)  
I think option C is incorrect.

Amar Saxena said: (Oct 24, 2017)  
According to me, it is C and D.

Papay said: (Dec 2, 2017)  
I think C & D are incorrect.

Suraj Shrestha said: (Dec 24, 2017)  
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.

Narendra said: (Jan 18, 2018)  
Option C & D both incorrect.

Tushar said: (Feb 9, 2018)  
Option A is correct one.

Anilpoojar said: (Feb 16, 2018)  
7.06 * 7.06 * 7.06cm for consistency test.

10 * 10 * 10 for strength test.

Gaurav Patil said: (Feb 22, 2018)  
Option D is incorrect.

Ashu said: (Feb 24, 2018)  
C and D 90% humidity as per is 456.

Sangam said: (May 3, 2018)  
This test is done for concrete not for cement. So, The given answer A is the right one.

Sangam said: (May 3, 2018)  
This test is done for concrete not for cement. So, The given answer A is the right one.

S .Bhakta said: (May 4, 2018)  
Option C & D is also incorrect.

Ruchir said: (May 4, 2018)  
I think option C & D are incorrect.

Wassi said: (Jun 13, 2018)  
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.

Hameed said: (Aug 6, 2018)  
The question is related for cement and not for concrete so answer A is correct.

Nishoch Yadav said: (Sep 30, 2018)  
Here, the question is related to cement not a cement concrete.

So, Ratio = 1:6
size = 70.6mm
temp = 27±2.

Shahid Ali said: (May 4, 2019)  
Yes, C and D are incorrect.

Vivek said: (Jul 26, 2019)  
It's p/4+3.5.

Kouahik Das said: (Aug 3, 2019)  
Answer C and D, but mould is 76 * 76 *76 mm and Humidity 90% this value as per IS code 456-2000.

Thank you.

Budh Maurya said: (Nov 30, 2019)  
Option C & D is the right answer.

Cube size 70.6*70.6 mm2

Humidity 90%.

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