### Discussion :: Concrete Technology - Section 1 (Q.No.6)

Manoj Kumar said: (May 29, 2013) | |

Please tell me what is the calculation of find the grade of concrete. I know only the means of m10 10kn /mm2 strength but I don't know in which use the ratio in mix. So please help me and send me mail the method of calculation in mixing ratio in all grade of concrete thnks. |

Sneha said: (Jul 24, 2013) | |

The sum of all digits of ratio should make it 10, here 1+3+6 =10. |

Nitin said: (Aug 24, 2013) | |

It is depend on various factors. Like workability, type of agg., admixture. |

Hare Ram said: (Sep 22, 2013) | |

1:3:6 means we should use the 1 part cement, 3 part fine aggregate and 6 part coarse aggregate of concrete mix by weight or volume. |

Ziyad said: (Oct 30, 2013) | |

Its weak con. Because little cement used so its absolutely 1:3:6 as used under foundations. |

Shashi Ranjan said: (Nov 22, 2013) | |

As per IS code 456 - 2000. M10 - 1:3:6 mix (approx). |

Vikas said: (Dec 7, 2013) | |

For M5 1:4:8. M10 1:3:6. M15 1:2:4. M20 1:1.5:3. |

Bharat said: (Feb 8, 2014) | |

By comparing M10 and M15 we can see that for more strength ratio is decreasing. Just remember M10 then M20/M15 and all other mix become easy to understand. |

Basant said: (Mar 11, 2014) | |

Please help me for the method of calculation in mixing ratio in all grade of concrete mix. |

Sanon said: (Jul 22, 2014) | |

1:3:6 Mix of concrete is used where. I mean in columns, slabs, beams etc. Tell it specifically. Waiting for reply from all respected members. |

Baldev said: (Jul 26, 2014) | |

M10 mix is never used in column, slabs or beams. It is a layer of cement concrete separating the earth to the main concrete in foundation or you can say it is only used in foundation. |

R.Naveen Kumar said: (Aug 26, 2014) | |

M10 mix was only used for foundation purpose. Because that having less compressive strength. |

Sumit Khangwal said: (Sep 24, 2014) | |

M-5 1:5:10. M-7.5 1:4:8. M-10 1:3:6. M-15 1:1.5:3. M-20 1:2:4. M-25 1:1:2. All of the above grade are made by design mix method. |

Mahesh Katkar said: (Sep 27, 2014) | |

M-5 1:5:10. M-7.5 1:4:8. M-10 1:3:6. M-15 1:1.5:3. M-20 1:2:4. M-25 1:1:2. |

Mohammed Shafeek said: (Oct 9, 2014) | |

@Sneka, your assumption is wrong, for M-15 ,the ratio is 1:1.5:3 by yours way summation all 1+1.5+3 = 5.5. |

Sridhar B said: (Dec 19, 2014) | |

M30-Depend on design mix (OR) M-30 = 1:1:1. |

Nitin said: (Dec 22, 2014) | |

For this firstly, you can understand the two term: First term:- Nominal mix. Second term:- Design mix. |

Kashif said: (Feb 17, 2015) | |

The general expression is 1:n:2n by volume where n is the number of sample test conducted. |

Vignesh said: (Jul 21, 2015) | |

For m50 what will be the ratio? |

Manju said: (Aug 14, 2015) | |

@Kashif. How we can determine the number of sample tests? |

Dev Nandan said: (Oct 4, 2015) | |

M15 is 1:2:4. M20 is 1:1.5:2. |

Ashish Bhargav said: (Oct 18, 2015) | |

Hello friends please tell me some material name by use of which we can increase the performance of concrete except admixture like silica fume, or some other chemical admixture. Please if someone have any idea then please inbox me. Please help me try to give some innovative ideas. |

Satani Mohit said: (Nov 6, 2015) | |

@Vignesh. M30 to above grade is ratio 1:1:1 (Cement:Sand:Aggregates). |

Hemraj said: (Dec 29, 2015) | |

What is grade? |

Nageswar said: (Jan 27, 2016) | |

Grade means types of aggregate whether it is fine or coarse. According to the grade the aggregate shape is depend. For: M5-1:5:10 M10-1:4:8 M15-1:3:6 M20-1:2:4 M25-1:1. 5:3 M30-1:1:1. |

Khalid said: (Apr 7, 2016) | |

Grade means characteristics strength of concrete after 28 days. For example M-10 M represent mix &10 is the compressive strength of concrete after 28 days. Characteristics strength means the expected result of the cube should not below 5%. |

Saritha. said: (Jul 16, 2016) | |

We are deciding the ratio according to IS 10262 - 2000 only. |

Madan said: (Aug 17, 2016) | |

Grade means compressive strength of concrete after 28 days. |

Farhad said: (Nov 2, 2016) | |

What is the formula of find M value? |

Veeru Meena said: (Jan 26, 2017) | |

M5 - 1 :5:10. M7.5 - 1:4:8. M10 - 1:3:6. M15 - 1:1.5:3. M20 - 1:2:4. M25 - 1:1:2. |

Qulahmad said: (Feb 1, 2017) | |

Thanks for the given explanation. |

Kabir said: (Feb 25, 2017) | |

What is the mix for M100? |

Maharajan said: (Mar 12, 2017) | |

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. |

Rahul said: (Mar 20, 2017) | |

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. |

Durai said: (Apr 5, 2017) | |

m5: -1:4:8. m10: 1:3:6. m15: 1:2:4. m20-1:1.5:3. m25-1:1:2. |

Sanjeev Upadhyay said: (Apr 16, 2017) | |

We can also calculate the mix proportion of the aggregate by; Dividing the no. of 30 into the no. of grade for example 10 ÷ 30=1 ÷ 3 it means the first no. Is the quantity of cement(1) and second is fine aggregate (3) and third is coarse aggregate which is just double of the fine aggregate; 1 + 3 + 6 = 10. |

Mocha said: (May 23, 2017) | |

M16 is enough for using joining area where is earth and pedestal slab or great beam m16 means 1.5.10. |

Harsh C. Patel said: (Jul 1, 2017) | |

As per standard concrete mix design, the following mix are considered. For M20 Grade - 1:1.5:3. M15 Grade - 1:2:4. M10 Grade - 1:3:6. M7.5 Grade - 1:4:8. M5 Grade - 1:5:10. |

Ritesh said: (Aug 9, 2017) | |

@Sneha. If M10 refers 1+3+6=10. Then M 15 equals to 1+2+4=7 but 7 is not equal to 15 then how? |

Mahesh said: (Oct 12, 2017) | |

What is the M in M10 mix? |

Saket said: (Oct 29, 2017) | |

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. |

Sisir Mal said: (Jul 28, 2018) | |

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. |

Ramya said: (Jul 31, 2018) | |

I am confused about ratios can you please explain the standards? |

Snehasis said: (Oct 8, 2018) | |

@Sisir mal. Please tell me from where we get the ratio M5 to M25 by nominal mix? |

Upender said: (Jan 21, 2019) | |

M5 - 1: 5: 10. M7. 5 - 1: 4: 8. M10 - 1: 3: 6. M20 - 1: 1.5: 3. M25 - 1: 1: 2. |

Hardik said: (Aug 5, 2019) | |

M5 = 1:5:10. M7.5 = 1:4:8. M 10 = 1:3:6. M15 = 1:2:4. M 20 = 1:1.5:3. M25 = 1:1:2. M30 = 1:0.75:1.5. M 35 = 1:0.5:1. M 40 = 1:0.25:0.5. |

Divya Mnr said: (Oct 13, 2019) | |

These all are nominal mix, 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 = 1:0.75:1.5 M35 = 1:0.5:1 M40 = 1:0.25:0.5 For the Design mix, the ratio will change depending upon the location, soil conditions...etc. |

Jeet said: (Feb 28, 2020) | |

M5 - 1:5:10 M7.5 - 1:4:8 M10 - 1:3:6 M15 - 1:1.5:3 M20 - 1:2:4 M25 - 1:1:2 M30 - 1:1:3 |

Pankaj Patil said: (Mar 5, 2020) | |

If, for M10 rade 1+3+6=10. Then for M20, 1+2+4=7 its not 20 then how its possible. |

Mridul said: (Jul 16, 2020) | |

According to me, the Correct ratio is 1:5:10. |

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