Civil Engineering - Concrete Technology - Discussion

8. 

According to I.S. : 456, the number of grades of concrete mixes, is

[A]. 3
[B]. 4
[C]. 5
[D]. 6
[E]. 7

Answer: Option E

Explanation:

No answer description available for this question.

Abhi said: (Jul 19, 2013)  
Standarad concrete is 7 m20 to m60.

High strength is m65 t0 m80.

Ordinary strength 3m m10 to m20.

Maggie said: (Jul 27, 2013)  
Nominal mix concrete : M5, M10, M15, M20, M25, M30, M35.

Sonu Sharma said: (Sep 28, 2013)  
According IS 456-2000.

Nominal mix concrete is,
M10, M15, M20, M25, M30, M35, M40.

Rahul said: (Oct 26, 2013)  
According IS 456-2000.

The number of grades of concrete mixes:
M10, M15, M20, M25, M30, M35, M40.

Augustin said: (Nov 28, 2013)  
The number of grades of nominal concrete mixes, is 7:
M5, M10, M15, M20, M25, M30 and M35.

Arabinda Khanra said: (Jan 5, 2014)  
What is the ratio of M30, M35 and M40?

Soniya said: (Jan 7, 2014)  
Above M30 Mix design is done because 5 ingredient of concrete will start above M30 i.e. cement, aggregates, water, admixture.

Govardhan said: (Mar 14, 2014)  
How M30, M35 can be treated as nominal mix?. It falls under the category of design mix.

Anish said: (Apr 28, 2014)  
How can we find out the ratio of M30, M35, M40, M50?

Sabyasachi Sen said: (Jun 14, 2014)  
Nominal concrete grades are from M5 TO M25 maximum. But still we need to have mix for M 25 also.

Here we take std concrete which starts from M 25 TO M 55 (i.e. 7) from IS 456:2000 table 2.

Vikas Singh Tomar said: (Dec 6, 2014)  
Standard seven grades of is, 456 are:

M2S.
M30.
M3S.
M40.
M4S.
MSO.
M55.

Lisha Paul said: (Dec 8, 2014)  
As per IS 456 ordinary concrete M10; M15; M20.

Standard Concrete M25 to M55.

High strength concrete is M60 to M80.

Laxmikanta Nayak said: (Dec 16, 2014)  
According to IS 456-2000 the above said @Sonu Sharma concrete design is correct.

Aditya Dubey said: (Jan 4, 2015)  
According to I.S. 456-2000.

Standard Concrete:

M-25.
M-30.
M-35.
M-40.
M-45.
M-50.
M-55.

Total: 7.

Suraj said: (Jan 27, 2015)  
Someone saying from m5 to m35 and few m25 to m55. Which one is correct>>>>?

Alekhya said: (Jan 27, 2015)  
How to identify the concrete is nominal mix or design mix using concrete grades?

Kani said: (Apr 28, 2015)  
M5, M7.5, M10, M15, M20, M25...

I don't know whether M30 will also be included.

Harsh said: (Jun 25, 2015)  
As per is 456:2000.

7 grades.

M10, 15, 20, 25, 30, 35, 40.

Sapna said: (Jul 7, 2015)  
A) Ordinary Grade M 10 to M 20.

B) Standard concrete M 25 to M 55.

C) High strength concrete M 60 to M 80.

D) The minimum grade of concrete for plain and reinforced concrete in.

Various exposures conditions have been revised as under:

Minimum Exposure condition grade of concrete.
Plain Cement.
Concrete.
Reinforced Cement.
Concrete.
Mild - M 20.
Moderate M 15 M 25.
Severe M 20 M 30.
Very Severe M 20 M 35.
Extreme M 25 M 40.

Ajeet said: (Jul 20, 2015)  
M-15, M-20, M-25, M-30, M-35, M-40, M-45.

Jainam said: (Aug 18, 2015)  
M-25 to M-55.

Sabya said: (Oct 15, 2015)  
According to IS 456 table 2 Grade of concrete is (M25-M55) 7 grade.

Mahesh Gaikwad said: (Oct 31, 2015)  
M-5 to M-20 Ordinary Concrete.

M-25 to M-80 Standard Concrete.

M-85 to M-200 High Strength Concrete.

Ali said: (Dec 1, 2015)  
I want make design for (M-30) what is the mix properties I can use and the details of max below.

OPC53.

Type of Aggregate: Crushed Angular Aggregate.

Chemical admixture type super plasticizer as per IS:1093.

Madhu said: (Feb 13, 2016)  
IS 456-2000 has designated the concrete mixes into a number of grades as M10, M15, M20, M25, M30, M35 and M40.

Lukman Ada said: (Mar 3, 2016)  
According to IS 456-2000 grade of concrete are as follows,

Ordinary Concrete - M 10 to M 20(3 grade).

Standard Concrete - M 25 to M 55(7 grade).

High strength Concrete - M 60 to M 80(5 grade).

Diya said: (May 6, 2016)  
The value should be 15 as per IS 456 - 2000.

Alekhya said: (May 15, 2016)  
As per IS 456-2000.

Grades of concrete mixes:

M10, M15, M20, M25, M30, M35, M40.

Samsung said: (Jul 26, 2016)  
For above M25 grade we follow mix design as per IS or design method.

Nitesh said: (Aug 31, 2016)  
Yes, I.S. code is gave of concrete grade is 7.5, 10, 15, 20, 25 and according your design above 25 to 55.

Ashok said: (Sep 17, 2016)  
IS 456-2000 has designated the concrete mixes into a number of grades as M10, M15, M20, M25, M30, M35 and M40. In this designation the letter M refers to the mix and the number to the specified 28 day cube strength of mix in N/mm2. The mixes of grades M10, M15, M20 and M25 correspond approximately to the mix proportions (1:3:6), (1:2:4), (1:1.5:3) and (1:1:2) respectively.

Abhishek Nandi said: (Nov 19, 2016)  
According to IS 456 The grade of concrete are 15, M10, M1,5 M20 (ORDINARY CONCRETE)
M25 M30 M35 M40 M45 M50 M55 (STANDARD CONCRETE).

& M60 M65 M70 M75 M80 (HIGH STRENGTH CONCRETE) So the actual answer is none.

Vishnu said: (Apr 5, 2017)  
According to old code(IS 456-1978) there are 7 grades of concrete(M10 to M40).

According to new code(IS 456-2000) there are 9 grades (M10 to M50).

Nitin Gavit said: (Apr 25, 2017)  
As per IS 456 : 2000 grade of concrete is:

Ordinary concrete - M10, M15, M20.
Standard concrete - M25, M30, M35 M40 M45 M50 M55.
High strength concrete - M60 M65 M70 M75 M80.

Indranil Karfa said: (May 12, 2017)  
It is M10 - M40.

Ref: KHURMI & GUPTA(civil engg MCQ).

Bmsadhu said: (Sep 4, 2017)  
Can anyone tell me what is the mix pro of m30 and m35?

Prabhu said: (Sep 28, 2017)  
M60 above concrete cannot using cement its true.

Saket Jain said: (Oct 29, 2017)  
Ans is (B).
There are 7 grades According to I.S. : 456, of concrete mixes, mentioned below.
M5 - 1:5:10
M7.5 - 1:4:8
M10 - 1:3:6
M15 - 1:2:4
M20 - 1:1.5:3
M25 - 1:1:2
M30,M35,M40 - Design Mix Followed.

Garry said: (Dec 1, 2017)  
Here in this question, the standard grade is asked only.

From M25 to M55.

Amit Naik said: (Jan 4, 2018)  
Nominal mix concrete is said under M20 or lower & standard concrete grades are 7 i.e; m25 to m55.

These values are from IS 456:2000.

Ashar Jami said: (Feb 6, 2018)  
For above M25, we go for Mix design.

Abhishek said: (Mar 31, 2018)  
According to IS 456:2000 NOMINAL MIN IS FROM M5 TO M25.

BUT ACCORDING TO IS 456: 2013 NOMINAL MIX IS FROM M5 TO M20.

Mix m25 and above are now regarded as design mix.

Deepak Martha said: (Aug 31, 2018)  
According to IS 456:2000 c-9.3 nominal concrete may be used M20 or less.

So, according to IS 456:2000 the nominal mix concrete is M5, M7.5, M10, M15, M20 mention in the table no-09 of is 456:2000.

Mn Yogi said: (Sep 11, 2018)  
Ordinary Concrete - M 10 to M 20.
Standard Concrete - M 25 to M 55.
High strength Concrete -above M55.

Neha said: (Sep 12, 2018)  
IS 456-2000 has designated the concrete mixes into a number of grades as M10, M15, M20, M25, M30, M35 and M40.

This is the correct answer.

Jeetu said: (Oct 24, 2018)  
The correct answer =3 grades.

The concrete mix = M10 M15 M20.
Design mix= M25 -M55.
High Concrete up to M80.

Sumanmondal said: (Jan 12, 2019)  
The concrete mixes are: M10, M15, M20, M25, M30, M35, M40

Akshey Sharma said: (Jun 1, 2019)  
@All.

Just read the question again they asking the number of grade, Not standard, not ordinary also not high strength.

So, Total no of grade is 15 (M10-M80).

Aparna Dubey said: (Jul 27, 2019)  
A/c to IS 456: concrete mix designated in 7 grades.

M100,
M150,
M200,
M250,
M300,
M350,
M400.

For design mix Letter M refers to mix and number to specified characteristics compressive strength of 15 cm cube at 28 days in N/mm^2 or kg/cm^2.

K.Das said: (Aug 3, 2019)  
1.Ordinary concrete- 5 (M5 to M20).
2. Stander concrete- 8 (M25 to M60).
3. Hight strength Concrete- 4 (M65 to M80).

Akshay Salve said: (Nov 24, 2019)  
According to IS 456-2000 grade of concrete.

Ordinary Concrete - M 10 to M 20(3 grade).
Standard Concrete - M 25 to M 55(7 grade).
High strength Concrete - M 60 to M 80(5 grade).

M5 1:5:10
M7.5 1:4:8
M10 1:3:6
M15 1:2:4
M20 1:1.5:3
M25 1:1:2
M30 As per Design
M35 As per Design
M40 As per Design

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