**Concrete Mix Design IS Code**

For Concrete mix design, we use, IS 456, and IS 10262.

Important Point

**Required Data for M30 Grade of Concrete Mix Design**

Characteristic Compressive Strength: 30 Mpa

Maximum Size of Aggregate: 20 mm

Work-ability, Slump: 125 – 150 mm

Degree of Quality Control: Good

Type of Exposure as per MORTH Table – 1700-2: Severe

Minimum Target Mean Strength as per MORTH Table: 1700-8: 42 Mpa ( 30 + 12 )

Max. Water Cement Ratio as per MORTH Clause – 1715.2: 0.4

Minimum Cement Content as per MORTH Clause – 1715.2: 360 Kgs

Maximum Cement Content as per MORTH Clause – 1715.2: 450 Kgs

**Required Test Data for Materials for M30 Grade of Concrete Mix Design**

**Specific Gravity details :**

**Type of Cement: OPC 53 Grade**

Material |
Specific Gravity |

Cement | 3.15 |

Coarse Aggregate 20mm | 2.885 |

Coarse Aggregate 12.5mm | 2.857 |

Fine Aggregate | 2.723 |

**Water Absorption details**:

Material |
Water Absorption |

Coarse Aggregate 20 mm | 0.42% |

Coarse Aggregate 12.5 mm | 0.47% |

Fine Aggregate | 1.38% |

**The calculation for Target Mean Strength**

Target Mean Strength for M30 Grade of Concrete Mix Design as per MORTH Table 1700-8 specification ( 5th revision )

For M30: 12 Mpa

30+12 = 42 Mpa

**Selection of Water Cement Ratio for M30 Grade of Concrete Mix design**

Maximum Water Cement Ratio Permitted As per MORTH Clause – 1715.2: 0.40

W/c Ratio Selected As 0.39

**Selection of Water for M30 Grade of Concrete Mix Design **

Water Content as per Table 2, of IS: 10262:2009 for 20 mm maximum size of aggregate IS: 186 litres.

The above-estimated water is suggested for a slump range of 25 to 50 mm in the above mentioned IS code. For each 25 mm increase in slump 3% water can be increased as per clause No. 4.2 IS 10262: 2009

Required slump is 150 mm, so

for 50 mm slump water required = 186 litre

for 75 mm slump = 186 x 3% = 5.58 ltr

186 + 5.58 = 191.58 ltr.

for 100 mm slump = 186 x 6% = 11.16 ltr

186 + 11.16 = 197.16 ltr

for 125 mm slump = 186 x 9% = 16.74 ltr

186 + 16.74 = 202.74 ltr

for 150 mm slump = 186 x 12% = 22.32 ltr

186 + 22.32 = 208.32 ltr.

Hence water requirement calculated as 208.32 ltr.

Superplasticizer is used in the mix. The water content can be reduced up to 35 Percent and above as per IS: 10262 – 2009 Based on trials with Superplasticizer water content reduction of 21.51 percent has been achieved with the same dose.

: 140.0

Say 140.0

**Cement Content**

Water Cement Ratio: 0.39

Hence Cement content : 140.0 / 0.39 = 358.97 Kg

Minimum cement content as per MORTH – 360 kg/cum

Say: 360 Kg

Hence Cement Content: 360 Kg

**Proportion of Volume of Coarse and Fine Aggregate Content for M30 Grade of Concrete Mix Design**

Hence Coarse aggregate content for MSA 20 mm: 60%

Sand content can be adopted, Max. : 40%

Course Aggregate Proportions ( 20 mm : 10 mm ) : 50%

## M30 Grade of Concrete Mix Design Calculation Formula

We are describing formula of concrete mix design calculation for M30 Grade of Concrete Mix Design but you can use this formula for any grade of concrete

Formula : Volume of material content = material weight / ( material specific gravity * total volume )

Volume of concrete = 1 Cu.M.

1 Cum = 1000 ltr ( in volume)

Volume calculation for materials:

Cement Content = 360 / 3.15 x 1000 = 0.114 Cu.M.

Water Content = 140 / 1.00 x 1000 = 0.140 Cu.M.

Admixture = 1.80 / 1.17 x 1000 = 0.0015 Cu.M.

Aggregate = 1- ( cement volume + water volume + admixture volume )

= 1 – ( 0.114 + 0.140 + 0.0015 ) = 0.745 Cu.M.

Now we got a volume of each material for use in concrete.

Now convert material volume into weight.

**Convert Volume into Weight for Concrete Mix**

This formula can be used for any grade of concrete mix design.

Formula = material weight = material volume x percentage of total volume x material sp. gravity x total volume.

Mass of coarse aggregates 20 mm = 0.745 x 0.60 x 0.50 x 2.885 x 1000 = 644.8 Kg.

Say 645 Kg.

Mass of coarse aggregates 12.5 mm = 0.745 x 0.60 x 0.50 x 2.857 x 1000 = 638.5 kg

Say 639 Kg.

Mass of fine aggregates = 0.745 x 0.40 x 1.00 x 2.723 x 1000 = 811.5 Kg

Say: 812 Kg

**Mix Proportion per CUM. for M30 Grade of Concrete Mix Design**

**Cement: 360 Kg **

**Water: 140 Kg **

**20 mm: 645 Kg**

**12.5 mm: 639 Kg **

**sand: 812 Kg**

Dosage of admixture, by the Weight of Cement

0.45% of cement weight: 1.80 Kg

Note:

In moisture correction, Weights of Aggregate and water can be replaced by the weights of the free moisture on Aggregates.

**Concrete Mix Design Ratio for M30**

M30 mix ratio – 1 : 2.5 : 3.5

## Trial Mix:1, (For M30 Grade Concrete Mix Design)

The trail mix is required to define the workability ( slump ), density, compaction, and, most of all, the compressive strength of different concrete grades for various purposes.

We are describing here trial for M30 Grade of Concrete Mix Design, but you can use this trial procedure for any grade of concrete.

In this trial mix, we design the following.

- Water cement ratio
- Proportion of cement, coarse aggregate, fine aggregate, water, and admixture ( if required ).
- Workability ( slump ).
- Density
- Compressive strength

**Concrete Cube Required for Trial Mix**

To check the compressive strength of trial mix concrete, we have to cast at least 12 nos. of cubes.

Age of In Days |
Nos of Cube Required |

3 Day | 3 |

7 Day | 3 |

28 Day | 6 |

**Total numbers of cubes – 12**

You can increase the cube numbers for three3 days, 7 days, or 28 days as per your requirement.

**Concrete Quantity Required for Trial Mix**

Volume of 1 cube mould = 0.150 x 0.150 x 0.150 = 0.003375 cum.

so concrete quantity for 1 cube = 0.003375 cum.

concrete quantity for 12 cubes = 0.003375 x 12 = 0.0405 cum.

We should take a little more quantity of concrete because it will stick on a trial mix drum and slump test purposes.

so assumed concrete quantity = 0.045 cum.

We should not take more quantity for the concrete trail mix because it doesn’t mix properly.

**Calculate the Material Weight for Trial**

As we calculated materials weight before for one cum.

**Cement: 360 Kg**

**Water: 140 Kg**

**20 mm: 645 Kg**

**12.5 mm: 639 Kg**

**sand: 812 Kg**

**Admixture: 1.80 Kg**

Now we calculate the quantity of materials for a trail mix.

cement = 360 x 0.045 = 16.2 kg.

water = 140 x 0.045 = 6.3 kg.

20 mm = 645 x 0.045 = 29.03 kg.

12.5 mm = 639 x 0.045 = 28.76 kg.

sand = 812 x 0.045 = 36.54 kg.

admixture = 1.8 x 0.045 = 0.081 kg

### Trial Mix Procedure

- Take the weights of all material as described above.
- After weighing materials, put coarse aggregates 20 mm and 12.5 mm first in the trial mix drum.
- Now add fine aggregate ( sand ) in trial mix drum and then add the cement.
- Mix these materials in the dry condition in a drum for at least 30 seconds.
- Then add 80 to 90 % of the water in a drum in many parts by adding throughout the mix.
- Add a bit more water in the mix, where you are going to add admixture.
- Mix the remaining water with the admixture, then add admixture in a concrete mix where you added a bit more water.
- It’s because, if the mix is fully coated with water, then it will not absorb admixture in it’s pores, and now admixture will perform his best performance.
- Finish these steps within two minutes.
- Check if any dry mix sticked inside the surface of a drum, instantly remove it manually from a surface by using the trowel. Stop the drum mixture for a maximum of 10 seconds for this action and restart it again.
- Mix it for continuously 5 minutes.
- Check the workability.
- This is called an initial slump. Note down.
- Don’t mix the concrete mix continuously; otherwise, the mix will produce more heat, and it causes a decrease in the slump of concrete mix.
- Start the mixer at the 5-minute interval for about 1 minute.

**Requirement of Workability**

As we described, our requirement of a slump is 125 – 150 mm at the site.

You have to check a slump after each 30-minute interval of up to 120 minutes ( 2 hours).

#### Trial Mix Cube Casting Procedure

- Cube casting shall be done just after a slump test after 2 hours.
- Cast the concrete cubes manually for better accuracy, don’t use the plate vibrator.
- Cast the concrete cubes by the same procedure as we usually cast.
- Cubes shall be cast in three-layer, and each layer’s thickness is 50 mm nearly.
- But strokes for each layer shall be between 35 to 45 no more difference for an accurate result.
- Maintain the temperature of the lab or room where trial cubes are going to be cast at 27 +/- 2-degree centigrade.
- After casting 12 numbers of trial cubes, place the casted cubes on a plane and firm platform. It should be a vibration-free place.
- Place cover sheet on top of each casted cubes to prevent water evaporation.
- Leave it for 24 hours
- After 24 hours, de-mold the trial cubes and give the identification by a permanent marker. Do not use the nail to write on cubes.
- Place these trial cubes in the water tank immediately, where water temperature shall be maintained at room temperature 27 +/- 2-degree centigrade.

**Compressive Strength of Trial Cubes for M30 Grade of Concrete Mix Design**

As we described before, we cast 12 numbers of a cube for compressive strength

3 cubes for 3 days

3 cubes for 7 days

and 6 cubes for 28 days.

- So after 3 days of casting cubes, take out three cubes from the water tank.
- Bring these cubes to a compressive testing machine and let it dry. We should test cubes, at least in surface saturated dry conditions.
- Before the test, the cubes set the rate of loading of the compression testing machine at 5 KN per second.
- Place the cube carefully in the compression testing machine in the center position.
- Start the compression testing machine and go to the ultimate load.
- Note down the ultimate load reading.
- Same like 3 days, we should test for 7 days and 28 days.

**Why Wet Cubes Get lower Strength than Dry Cubes**

If cubes are dry more than SSD conditions then, there is a chance to get a little bit more strength.

In wet conditions or SSD conditions, concrete cube’s pores are full of water, and when you compress these cubes in the compressive testing machine, water inside the cube works like hydraulic pressure from inside, and this pressure helps to crack the cube earlier than dry cubes.

**Required Compressive Strength for Trial Cubes**

As we described before that our target means strength for M30 is 42 Mpa.

But for 3 days and 7 days, we are giving below

minimum compressive strength required in 3 days – 40 % – 17 Mpa

minimum compressive strength required in 7 days – 80 % – 34 Mpa

### Trial Mix Result

**1.Workability Result**

Initial Time in Min |
Collapse in mm |

After 30 minute | 190 mm |

After 60 minute | 170 mm |

After 90 minute | 155 mm |

After 120 minute | 140 mm |

**2**.**Compressive Strength Result **

Sr.No. |
Casting Date |
Cube ID |
Age of Cube |
Testing Date |
Weight (Gm) |
Load (Kn) |
Strength (n/mm^{2}) |
Avg Strength |

1 | 1- 03 -19 | Trial Mix-01 | 3 days | 4-03-19 | 8642 | 401.6 | 17.85 | 18.24 |

2 | 8603 | 397.4 | 17.66 | |||||

3 | 8586 | 432 | 19.2 | |||||

4 | 07 days | 8-03-19 | 8598 | 781.7 | 34.74 | 34.92 | ||

5 | 8655 | 812.3 | 36.1 | |||||

6 | 8670 | 763.2 | 33.92 | |||||

7 | 28 days | 29-03-19 | 8621 | 912.8 | 40.57 | 41.52 | ||

8 | 8639 | 953 | 42.36 | |||||

9 | 8572 | 936.9 | 41.64 | |||||

10 | 8640 | 929.4 | 41.31 | 41.43 | ||||

11 | 8612 | 946.5 | 42.07 | |||||

12 | 8648 | 920.6 | 40.92 |

So as you can see from the result above, we got a good result in 3 days and 7 days, but we didn’t get in 28 days. Average of 28 days strength is ( 41.52 + 41.43 ) / 2 = 41.48 N/mm^{2} .

Which is less than 42 MPa. As we described, as per MORTH 5th revision, our requirement in 28 days for M30 is 42 MPa.

So now we are going to decrease the water-cement ratio a bit.

## Trial Mix: 2 ( for M30 Grade of Concrete Mix Design)

Previously we selected 0.39 water-cement ratio. Now we will do a trial on 0.38.

Definitely, compressive strength will increase while decreasing the water-cement ratio.

So we have to calculate our concrete mix design again on 0.38 water-cement ratio because if you change the water-cement ratio, then materials quantity will change too.

We are describing calculation in short here because we described before. If you are getting any doubt, please scroll above for full details.

**Cement Content for M30 Grade of Concrete Mix Design**

Water Cement Ratio: 0.38

Hence Cement content : 140.0 / 0.38 = 368.42 Kg

Say: 368 Kg

Hence Cement Content: 368 Kg

**The proportion of Coarse and fine aggregate will be the same**

Hence Coarse aggregate content for MSA 20 mm: 60%

Sand content can be adopted, Max. : 40%

Course Aggregate Proportions ( 20 mm : 10 mm ) : 50%

** Calculation for Materials Volume**

Volume of concrete = 1 Cu.M.

1 Cum = 1000 ltr ( in volume)

Volume calculation for materials:

Cement Content = 368 / 3.15 X 1000 = 0.117 Cu.M.

Water Content = 140 / 1.00 X 1000 = 0.140 Cu.M.

Admixture = 1.80 / 1.17 X 1000 = 0.0015 Cu.M.

Aggregate = 1- ( cement volume + water volume + admixture volume )

= 1 – ( 0.117 + 0.140 + 0.0015 ) = 0.742 Cu.M.

Now we got a volume of each material for use in concrete.

Now convert material volume into weight.

**Convert Volume into Weight for Concrete Mix**

Mass of coarse aggregates 20 mm = 0.742 X 0.60 X 0.50 X 2.885 X 1000 = 642.2 Kg.

Say 642 Kg.

Mass of coarse aggregates 12.5 mm = 0.742 X 0.60 X 0.50 X 2.857 X 1000 = 636 kg

Say 636 Kg.

Mass of fine aggregates = 0.742 X 0.40 X 1.00 X 2.723 X 1000 = 808.2 Kg

Say: 808 Kg

**Mix Proportion per CUM. of M30 Grade of Concrete Mix Design**

Cement: 368 Kg

Water: 140 Kg

20 mm: 642 Kg

12.5 mm: 636 Kg

sand: 808 Kg

Dosage of admixture, by the weight of Cement

0.45% of cement weight: 1.80 Kg

**Start the Trial Again with these detail described above**

Now we calculate the quantity of the material for a trail mix

cement = 368 * 0.045 = 16.56 kg

water = 140 * 0.045 = 6.3 kg

20 mm = 642 * 0.045 = 28.89 kg

12.5 mm = 636 * 0.045 = 28.62 kg

sand = 808 * 0.045 = 36.36 kg

admixture = 1.8 * 0.045 = 0.081 kg

**Trial Mix Procedure**

We are repeating the procedure because it’s very important tips for a trail mix.

- Take the weights of all material, as described above.
- After weighing materials, put coarse aggregates 20 mm and 12.5 mm first in the trial mix drum.
- Now add fine aggregate ( sand ) in trial mix drum and then add the cement.
- Mix these materials in the dry condition in a drum for at least 30 seconds.
- Then add 80 to 90 % of the water in a drum in many parts by adding throughout the mix.
- Add a bit more water in the mix, where you are going to add admixture.
- Mix the remaining water with the admixture, then add admixture in a concrete mix where you added a bit more water.
- It’s because, if the mix is fully coated with water, then it will not absorb admixture in it’s pores, and now admixture will perform his best performance.
- Finish these steps within two minutes.
- Check if any dry mix sticked inside the surface of a drum, instantly remove it manually from a surface by using a trowel. Stop the drum mixture for a maximum of 10 seconds for this action and restart it again.
- Mix it for continuously 5 minutes.
- Check the workability.
- This is called an initial slump. Note down.
- Don’t mix the concrete mix continuously; otherwise, the mix will produce more heat, and it causes a decrease in the slump of concrete mix.
- Start the mixer at the 5-minute interval for about 1 minute.

**Requirement of Workability**

As we described, our requirement of a slump is 125 – 150 mm at the site.

We have to check the slump after each 30-minute interval of up to 120 minutes ( 2 hours).

### Trial Mix Cube Casting Procedure

We are repeating this because it’s very important tips for trial cube casting.

- Cube casting shall be done just after a slump test after 2 hours.
- Cast the concrete cubes manually for better accuracy, don’t use the plate vibrator.
- Cast the concrete cubes by the same procedure as we usually cast.
- Cubes shall be cast in three-layer, and each layer’s thickness is 50 mm nearly.
- But strokes for each layer shall be between 35 to 45. No more difference for an accurate result.
- Maintain the temperature of the lab or room where trial cubes are going to be cast at 27 +/- 2-degree centigrade.
- After casting 12 numbers of trial cubes, place the casted cubes on a plane and firm platform. It should be a vibration-free place.
- Place cover sheet on top of each casted cubes to prevent water evaporation.
- Leave it for 24 hours
- After 24 hours, de-mold the trial cubes and give the identification by a permanent marker. Do not use the nail to write on cubes.
- Place these trial cubes in the water tank immediately, where water temperature shall be maintained at room temperature 27 +/- 2-degree centigrade.

**Compressive Strength of Trial Cubes**

As we described before, we cast 12 numbers of a cube for compressive strength

3 cubes for 3 days

3 cubes for 7 days

and 6 cubes for 28 days.

- So after 3 days of casting cubes, take out three cubes from the water tank.
- Bring these cubes to a compressive testing machine and let it dry. We should test cubes, at least in surface saturated dry conditions.
- Before the test, the cubes set the rate of loading of the compression testing machine at 5 KN per second.
- Place the cube carefully in the compression testing machine in the center position.
- Start the compression testing machine and go to the ultimate load.
- Note down the ultimate load reading.
- Same like 3 days, we should test for 7 days and 28 days.

**Required Compressive Strength for Trial Cubes**

As we described before that our target means strength for M30 is 42 Mpa.

But for 3 days and 7 days, we are giving below

minimum compressive strength required in 3 days – 40 % – 17 Mpa

minimum compressive strength required in 7 days – 80 % – 34 Mpa

### Trial Mix Result

**1. Workability Result**

Initial Time in Min |
Collapse in mm |

After 30 minute | 180 mm |

After 60 minute | 165 mm |

After 90 minute | 150 mm |

After 120 minute | 135 mm |

**2. Compressive Strength Result **

Sr.No. |
Casting Date |
Cube ID |
Age of Cube |
Testing Date |
Weight (Gm) |
Load (Kn) |
Strength (n/mm^{2}) |
Avg Strength |

1 | 1- 04 -19 | Trial Mix-02 | 3 days | 4-04-19 | 8671 | 412 | 18.31 | 18.44 |

2 | 8622 | 430.4 | 19.13 | |||||

3 | 8639 | 402.5 | 17.89 | |||||

4 | 07 days | 8-04-19 | 8706 | 800.6 | 35.58 | 35.83 | ||

5 | 8665 | 784.1 | 34.85 | |||||

6 | 8614 | 833.7 | 37.05 | |||||

7 | 28 days | 29-04-19 | 8698 | 961.3 | 42.72 | 42.47 | ||

8 | 8627 | 947.4 | 42.11 | |||||

9 | 8720 | 958.1 | 42.58 | |||||

10 | 8679 | 970.4 | 43.13 | 42.5 | ||||

11 | 8711 | 951.3 | 42.28 | |||||

12 | 8632 | 946.9 | 42.08 |

So as you can see from this result described above, we got a good result in 3 days, 7 days and 28 days. Average of 28 days strength is ( 42.47 + 42.5 ) / 2 = 42.49 N/mm^{2} .

Which is greater than 42 MPa. As we described, as per MORTH 5th revision, our requirement in 28 days for M30 is 42 MPa.

So now, we got the perfect proportion for the M30 grade of concrete.

### M30 Concrete

To find the design mix ratio, divide the calculated value of all materials by the weight of cement. Therefore Mix Ratio of M30 Grade concrete by weight is **Cement : F.A : C.A : Water = 1 :1.63 : 2.8 : 0.45.**

S.No. |
MATERIALS |
QUANTITY |

1 | Cement | 420 kg |

2 | Fine Aggregate | 685 kg |

3 | Coarse Aggregate (20mm) | 1170 kg |

4 | WATER | 190 L |

### What Is Design Mix M30?

- Grade designation : M30
- Type of cement : OPC 53 Grade conforming IS 12269
- Maximum nominal size of aggregate : 20mm
- Minimum cement content : 320 kg/m
^{3}(IS 456:2000) - Maximum water-cement ratio : 0.45 (Table 5 of IS 456:2000)
- Workability : 100-120mm slump
- Exposure condition : Moderate (For Reinforced Concrete)
- Method of concrete placing : Pumping
- Degree of supervision : Good
- Type of aggregate : Crushed Angular Aggregates
- Maximum cement content : 360 kg/m
^{3} - Chemical admixture type : Super Plasticizer ECMAS HP 890

### What Is M30 Concrete Ratio?

M 30 Concrete ratio 1 part cement, 1.5 part of sand (Fine aggregate), 3 part of Aggregate ( Coarse aggregate)

### Is Code for M30 Concrete Mix Design?

Design mix of M30 grade concrete as per latest IS code **10262**: 2019

### What Is the Strongest Concrete Mix Ratio?

One of the best concrete mix ratios is **1 part cement, 3 parts sand, and 3 parts aggregate**, this will produce approximately a 3000 psi concrete mix. The strength of this mix ratio is good for most concrete slabs, footings, steps, and foundation walls.

### Is 456 a Mix Design?

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/mm^{2}.

### Which Cement Is Better 43 Grade or 53 Grade?

The fineness in cement generates early gain in strength, but along with high heat of hydration. OPC 43 grade cement is generally used for non-structural works like plastering flooring etc. Whereas **OPC 53 grade cement** is used in the projects which require higher strength like concrete bridges, runways RCC works etc.

### How Many Bags of Cement Do I Need for M30 Concrete?

Cement, Sand and aggregate requirement for Different grade concrete

Grade of Concrete |
Nominal Mix Proportion |
Cement Required (bag)/cum |

M30 |
1:1.5:3 |
7.5 |

### How Do You Calculate a Mix Ratio?

**Divide 1 by the total number of parts (water + solution)**. For example, if your mix ratio is 8:1 or 8 parts water to 1 part solution, there are (8 + 1) or 9 parts. The mixing percentage is 11.1% (1 divided by 9).

### Is Code for Mix Design?

The **mix design** as per IS 10262:2009 is in line with ACI 211.1. The **code** permits the use of 1. supplementary materials such as chemical and mineral admixtures. Provisions of IS 456:2000 are applicable for durability requirements with all types of exposure.

### Where Do We Use M30 Grade Concrete?

Application/use:- It can be used in construction of Slabs, beams, columns, footings, etc.

- M-30 Mix Designs as per IS-10262-2009.

### What Is M30 Concrete Mix Design?

Mix proportioning for a concrete of M30 grade is given in A·I to A-ll. **s = standard deviation**. From Table I of IS 10262:2009, Standard Deviation, s = 5 N/mm^{2}. Therefore, target strength = 30 + 1.65 x 5 = 38.25 N/mm^{2}.

### What Is the Compressive Strength of M30 Grade Concrete?

M30 minimum compressive strength N/mm^{2} at 7 days near about 30 N/mm and specified characteristic compressive strength N/mm^{2} at 28 days near about 30 N/mm^{2}.

### What Is M in M30 Concrete?

Concrete grades are denoted by M10 M20 M30 according to their compressive strength. The “M” denotes **Mix design of concrete** followed by the compressive strength number in N/mm2 “ Mix” is the respective ingredient proportions which are Cement: Sand: Aggregate Or Cement: Fine Aggregate: Coarse Aggregate.

### What Is M30 Design Mix?

M30 of the best concrete mix ratios is **1 part cement, 1.5 parts sand, and 3 parts aggregate, this will produce approximately a 4350 psi concrete mix.**

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