Civil Engineering - Concrete Technology - Discussion

41. 

For the construction of R.C.C. slabs, columns, beams, walls, etc. the grade of concrete mix used, is

[A]. 1 : 3 : 6
[B]. 1 : : 3
[C]. 1 : 2 : 4
[D]. 1 : 1 : 2
[E]. 1 : 4 : 8.

Answer: Option C

Explanation:

No answer description available for this question.

Aravind Gottumukkala said: (Aug 29, 2014)  
1:1.5:3, because is 456-2000 specifies min grade of concrete for rcc works is M20.

Hanil.K.H said: (Dec 25, 2014)  
For general R.C.C works in building, proportion of concrete is 1:1.5:3.

Darshan H A said: (Jul 4, 2016)  
Minimum grade of concrete for RCC work is M20 and proportion is 1 : 1.5 : 3.

Karan said: (Jul 8, 2017)  
Minimum grade of concrete for R.C.C. work as per IS 456 is M20 which is 1:1.5:3.

Sathyadallu said: (Jul 18, 2017)  
Anyone explain the answer.

S. Dharmesh said: (Sep 24, 2017)  
Correct answer is 1:1/2:3 according to reference book by Khurmi.

Akp said: (Oct 17, 2017)  
Yes, 1:1.5:3 is right answer.

Minesh Rathore said: (Jan 6, 2018)  
As per IS code, blow than M20 (1:1. 5:3) grades not used in Rcc work.

Manjunatha R.N. said: (Jan 11, 2018)  
Yes, it is revised from m15 to m20, therefore ans is m20 i.e 1:1.5:3.

Sunny said: (Apr 21, 2018)  
Please, check m20 proportion.

Shariq said: (May 13, 2018)  
M20 concrete is used having proportion 1:1.5:3.

Deepu Maurya said: (Oct 21, 2018)  
IS 456 2000 M20 is 1 : 1.5 : 3.

Abhik said: (Mar 14, 2019)  
1:2:4 is the correct answer.

Chumman said: (May 12, 2019)  
M20 is right one.

Manisivan said: (Oct 2, 2019)  
Where cement concrete 1:2; 4 ratio is used it means 1 part cement 2 parts of fine aggregate or coarse sand and 4 parts of coarse aggregate. This ratio cement concrete has good strength and is recommended for the following type of buildings and works:-

- Used in footings of columns and raft foundation, used in beams, slabs, columns, stairs and walls of ordinary, single story and temporary buildings and used in retaining walls, pavements, floors and bedplates etc.

- Where cement concrete 1:1:5:3 ratio is used it means 1 part cement 1.5 parts of fine aggregate or coarse sand and 3 parts of coarse aggregates. This ratio cement concrete has very good strength and is recommended for the following type of buildings and works:-

- Important RCC structures, piles, arches, impermeable construction against water heads. This ratio of cement concrete is safe against earth quake.

Nitesh Warhade said: (Nov 17, 2019)  
1:1.5:3 is M20 grade of concrete. 1:2:4 is M20 Grade of Concrete & for RCC minimum M20 grade is use as per IS 456-2000.

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