Civil Engineering - RCC Structures Design - Discussion

3. 

As per I.S. 456 - 1978, the pH value of water shall be

[A]. less than 6
[B]. equal to 6
[C]. not less than 6
[D]. equal to 7

Answer: Option C

Explanation:

No answer description available for this question.

Ahmad Reshad said: (Jul 21, 2013)  
Water used for mixing and curing shall be clean and free from injurious amounts of oils, acids, alkalis, salts, sugar, organic materials or other substances that may be deleterious to concrete or steel.

Sharvari said: (Oct 15, 2013)  
The Water used for the construction activity should be free from acids, and the pH below 7 indicates presence of acids in the water, Thus, it won't be fitful for the construction activity.

Basically the pH value should be maintained nearly by 7.

Harshdeepsingh said: (Apr 12, 2014)  
Because the water which pH value is less 7is basis water more or equal its a acidic or presence of alkali or organic matter and minerals so maintain the pH value nearly equal to 7 for construction economy.

Rishabh said: (Aug 27, 2014)  
Acidic and basic content of water is harmful for the structure. So we can use water with ph value 7.

D.Gmurthy said: (Sep 1, 2014)  
Yes water shall be free from bases and acids so ph = 7.

Prakash said: (Oct 13, 2014)  
We can easily say that acidity of water organic matters is to known the under less than 7.

Bikash said: (Nov 26, 2014)  
But IS 446:2000, Clause 5.4.2 (the pH value of water shall be not less then 6). So the correct answer is C.

Bikash said: (Nov 26, 2014)  
But we use IS 456:2000 code book, (the pH value of water shall be not less than 6). So the answer is C.

Suryateja said: (Jun 4, 2015)  
Because beyond 6 (i.e <6) the water become acidic which deteriorates the cement or concrete.

Amaran Radha said: (Sep 24, 2015)  
Can anyone say the maximum permissible ph of water used for construction activity?

Aamir said: (Oct 12, 2015)  
The pH value of the water shall be in the range between 6.5 and 8.5.

Manas Nayak said: (Mar 5, 2016)  
As per I.S. 456-1978, the pH value of water shall be not less than 6. The pH Value of the water shall be in the range between 6.5 and 8.5.

Khalid said: (Apr 6, 2016)  
The pH value of water should be not less than 6.

If that type of water used in concrete it leads corrosion because cement can hold all the concrete ingredient if the pH Value around 11.

Shivam Rathour said: (Sep 7, 2016)  
The pH value of drinking water will be 6.5 - 8.5.

Shubham Singh Baghel said: (Sep 29, 2016)  
IS 456:2000, page no 14, clause 5.4.2 the pH value of water should not be less than 6.

Shambhoo K Jha said: (Feb 16, 2017)  
Water which is fit for drinking is also fit for concrete. pH value should not be less than 6. It should be preferably around 7 i.e. neutral.

As the concrete is alkaline so limit of alkalinity is not mentioned in IS. But, it is better if it is in the range of 6.5 to 8.5.

Raja said: (Apr 9, 2017)  
The PH value of water is 7.

Baidya said: (May 13, 2017)  
I think C is correct answer.

Yugender Elugu said: (Jun 16, 2017)  
C is correct. The pH value should be less than 6 as per IS 456 2000.

Venkat Reddy said: (Aug 4, 2017)  
Open IS 456 : 2000 code page:15 and find 5.4.3. It states that the pH value should not be less than 6.

Faizan Raza Raza said: (Nov 22, 2017)  
The pH value of water shall be not less than 6. (clause 5.4.2, IS:456 2000).

Mohammad Yasir said: (Feb 28, 2018)  
PH value for construction purpose should not be less than 6 accordingly to IS:456:2000 as it induces corrosion in reinforcement.

Sudhakar D said: (Feb 28, 2019)  
The alkalinity of water is 356 mg/l.

Is this correct for construction grade of concrete is M40 & M30.

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