Civil Engineering - Building Materials - Discussion

27. 

Minimum required water cement ratio for a workable concrete, is

[A]. 0.30
[B]. 0.40
[C]. 0.50
[D]. 0.60
[E]. 1.0.

Answer: Option B

Explanation:

No answer description available for this question.

Ravi Mehta said: (Feb 1, 2015)  
Studies by multiple authors, including Powers, Brownyard and Copeland, indicated that paste had to have a w/c of about 0.40 in order to fill the spaces between cement particles. If we don't have the minimum required water content, our concrete mix will be too stiff to place.

Srinivas said: (Oct 13, 2015)  
Water cement ratio is nothing but weight of water/weight of cement.

Mrinmoy Nath said: (Jul 23, 2016)  
It should be 0.38 as given in M.S Setty book.

Tushar Patel said: (Sep 26, 2016)  
As a reference of M.S. Setty book, the answer is 0.38.

Gayatri said: (Oct 29, 2016)  
Yes, that is approximately 0.40.

Siddhant Chauhan said: (Dec 22, 2016)  
It should be 0.45 for thin structure and 0.55 for heavy structure lesser is better.

Aarti said: (Jan 20, 2017)  
Yeah, 0.38 tends to 0.4 so, the correct answer is 0.4.

Dhiraj said: (Feb 6, 2017)  
Maximum w/c for durable concrete is?

Kishan said: (Oct 11, 2017)  
0.8 as per R.S. Khurmi.

Ravi said: (Nov 2, 2017)  
Minimum 0.3.
And maximum 0.4.

Vishal said: (Dec 9, 2017)  
@Kishan.

0.8 is maximum for durable concrete.

Tapash said: (Dec 15, 2017)  
According to my knowledge, it is 0.38 wc ratio.

Hardik said: (Jan 24, 2018)  
0.85 as per khurmi.

Varinder said: (Feb 3, 2018)  
Water cement ratios of 0.45 to 0.60 are more typically used.

Sam said: (Apr 26, 2018)  
I think .35 to .45 normally.

Diwesh said: (May 17, 2018)  
Max w/c ratio for durable concrete 0.8 how?

Although max is 0.6.

Amrita said: (Oct 24, 2018)  
The standard water-cement ratio.

Water cement ratios of 0.45 to 0.60 are more typically used.

J J Radadiya said: (Mar 9, 2019)  
In concrete, for chemical reaction 0.23% water content is require. and 0.15% water content require for evaportion loss. 0.23 + 0.15 = 0.38.

But on-site for convenience, we take 0.38 as 0.40

S.Sujith said: (Apr 17, 2019)  
Correct answer is 0.36.

Dev Ch said: (Aug 14, 2019)  
Thanks @Radadiya.

Anil said: (Dec 19, 2019)  
Minimum 0.35 & maxmum 0.45.

Dipankar Barai said: (Jul 31, 2020)  
Min - 0.35.

Maaz Khan said: (Sep 8, 2020)  
0.40 what is this?

Please explain me the unit.

Bilal said: (Jan 17, 2021)  
@Maaz.

It is a ratio, so no units.

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