Civil Engineering - RCC Structures Design - Discussion

Discussion Forum : RCC Structures Design - Section 1 (Q.No. 3)
As per I.S. 456 - 1978, the pH value of water shall be
less than 6
equal to 6
not less than 6
equal to 7
Answer: Option
No answer description is available. Let's discuss.
23 comments Page 1 of 3.

Shambhoo K Jha said:   7 years ago
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.

Sharvari said:   1 decade ago
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:   1 decade ago
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.

Ahmad Reshad said:   1 decade ago
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.

Khalid said:   8 years ago
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.

Manas Nayak said:   8 years ago
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.

Mohammad yasir said:   6 years ago
PH value for construction purpose should not be less than 6 accordingly to IS:456:2000 as it induces corrosion in reinforcement.

Bikash said:   10 years ago
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.

Sudhakar d said:   5 years ago
The alkalinity of water is 356 mg/l.

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

Bikash said:   10 years ago
But we use IS 456:2000 code book, (the pH value of water shall be not less than 6). So the answer is C.

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