# What is the mix ratio for C20, C25, C30, C35 and C40 concrete

What is the mix ratio for C20, C25, C30, C35 and C40 concrete | what is the mix ratio for C20 concrete | what is the mix ratio for C25 concrete | what is the mix ratio for C30 concrete | what is the mix ratio for C40 concrete.

C20 concrete is medium strength concrete mix suitable for reinforced foundation, footing, slab casting, light duty house floor, slabs, paths, patio, driveway, steps, garage floor and all types of residential construction.

In C20 concrete mix, C stands for Concrete strength class and numerical figure 20 is overall characteristics of compressive strength @28 Days measured in N/mm^2 when tested with 15cm × 15cm × 15cm Cube. So, fck value for C20 concrete is 20 MPa or 20 N/mm^2.

Grades of concrete are defined by its compressive strength and composition of the concrete- cement water ratio, amount of Sand and aggregate, and the minimum strength the concrete should have following 28 days of initial curing after construction.

C20, C25, C30, C35 and C40 is different grade of concrete having different Compressive strength. Characteristics of compressive strength of concrete denoted by fck. Value of fck for C20 grade of concrete is 20 MPa. Value of fck for C25 grade of concrete is 25 MPa. Value of fck for C30 grade of concrete is 30 MPa. Value of fck for C40 grade of concrete is 40 MPa.

Concrete mix ratio is the proportion of components such as Cement, Sand, gravel and water in concrete mix. Proportion of each components in concrete mix either mix by volume or by weight. Most common concrete mix ratio by volume which are used for construction are 1:2:3, (1 cement: 2 Sand: 3 Gravel or Stone). Taking water/ cement ratio about 0.60.

In this article we know about what is the mix ratio for C20, C25, C30, C35 and C40 concrete by weight for 1 cubic meter. C40 grade of concrete is a high strength concrete mix suitable for commercial use, most commonly used in the construction of structural and support beams, footings and foundations, roadworks, and in agricultural use. It is Ideal for foundations, footing for septic tanks, paving HGV parks and agricultural yards.

## What is the mix ratio for C20 concrete

The common concrete mix ratio to create C20 grade of concrete is 1 : 1.81 : 3.68 : 0.51 (cement: Sand: Stone: water) by weight. This means, 1m3 of C20 grade of concrete can be prepared by mixing of 1 part of cement (343kg of cement) + 1.81 parts of Sand (621kg of Sand) + 3.68 parts of Stone (1261 kg gravel) + 0.51 parts of water (175kg of water).

What Does C20 concrete meaning? C20 concrete grade means the concrete having minimum compressive strength of 20 N/mm^2 at 28 days on cylinder test after the concrete has been poured. The C stands for concrete, and the numerical figure indicates the strength of the concrete.

### What is the mix ratio for C25 concrete

The common concrete mix ratio to create C25 grade of concrete is 1 : 1.40 : 2.85 : 0.47, (cement: Sand: Stone: water) by weight. This means, 1m3 of C25 grade of concrete can be prepared by mixing of 1 part of cement (415kg of cement) + 1.40 parts of Sand (583kg of Sand) + 2.85 parts of Stone (1184 kg gravel) + 0.47 parts of water (195kg of water).

What Does C25 concrete meaning? C25 concrete grade means the concrete having minimum compressive strength of 25 N/mm^2 at 28 days on cylinder test after the concrete has been poured. The C stands for concrete, and the numerical figure indicates the strength of the concrete.

### What is the mix ratio for C30 concrete

The common concrete mix ratio to create C30 grade of concrete is 1 : 1.18 : 2.63 : 0.41, (cement: Sand: Stone: water) by weight. This means, 1m3 of C30 grade of concrete can be prepared by mixing of 1 part of cement (459kg of cement) + 1.18 parts of Sand (542kg of Sand) + 2.63 parts of Stone (1206 kg gravel) + 0.41 parts of water (188kg of water).

What Does C30 concrete meaning? C30 concrete grade means the concrete having minimum compressive strength of 30 N/mm^2 at 28 days on cylinder test after the concrete has been poured. The C stands for concrete, and the numerical figure indicates the strength of the concrete.

### What is the mix ratio for C35 concrete

The common concrete mix ratio to create C35 grade of concrete is 1 : 1.37 : 2.78 : 0.46, (cement: Sand: Stone: water) by weight. This means, 1m3 of C35 grade of concrete can be prepared by mixing of 1 part of cement (424kg of cement) + 1.37 parts of Sand (581kg of Sand) + 2.78 parts of Stone (1179 kg gravel) + 0.46 parts of water (195kg of water). Must use 42.5 grade cement or above.

What Does C35 concrete meaning? C35 concrete grade means the concrete having minimum compressive strength of 35 N/mm^2 at 28 days on cylinder test after the concrete has been poured. The C stands for concrete, and the numerical figure indicates the strength of the concrete.

### What is the mix ratio for C40 concrete

The common concrete mix ratio to create C40 grade of concrete is 1 : 1.08 : 2.41 : 0.40, (cement: Sand: Stone: water) by weight. This means, 1m3 of C40 grade of concrete can be prepared by mixing of 1 part of cement (488kg of cement) + 1.08 parts of Sand (528kg of Sand) + 2.41 parts of Stone (1176 kg gravel) + 0.40 parts of water (195kg of water). Must use 42.5 grade cement or above.

What Does C40 concrete meaning? C40 concrete grade means the concrete having minimum compressive strength of 40 N/mm^2 at 28 days on cylinder test after the concrete has been poured. The C stands for concrete, and the numerical figure indicates the strength of the concrete.

#### C10 concrete mix ratio using ballast

Particular cement to ballast mix ratio to create C10 grade of concrete should be 1:10 (1 part of cement mix to 10 parts of ballast. Ballast is premix of sharp sand and course gravel or aggregate. C10 is low strength concrete grade particularly used for non-structural construction elements like patio slabs and pathways.

#### C15 concrete mix ratio using ballast

Particular cement to ballast mix ratio to create C15 grade of concrete should be 1:8 (1 part of cement mix to 8 parts of ballast. Ballast is premix of sharp sand and course gravel or aggregate.
C15 concrete or Gen 2 concrete can be used for house floors with no embedded metal, ideal material for flooring, foundations for small walls, sheds & conservatories, Paving for steps and paths.

#### C20 concrete mix ratio using ballast

Particular cement to ballast mix ratio to create C20 grade of concrete should be 1:6 (1 part of cement mix to 6 parts of ballast. Ballast is premix of sharp sand and course gravel or aggregate. This grade of concrete is an ideal grade of concrete mostly used for domestic application such as foundation for garden walls, paving, shed bases, garage bases, patio, path and extension.

#### C25 concrete mix ratio using ballast

Particular cement to ballast mix ratio to create C25 grade of concrete should be 1:5 (1 part of cement mix to 5 parts of ballast. Ballast is premix of sharp sand and course gravel or aggregate. This grade of concrete is commonly used for flooring, foundations, footings, and filling trenches.

#### C30 concrete mix ratio using ballast

Particular cement to ballast mix ratio to create C30 grade of concrete should be 1:4 (1 part of cement mix to 4 parts of ballast. Ballast is premix of sharp sand and course gravel or aggregate. This concrete is a common commercial concrete mix typically used for outdoor projects such as pavements.

#### C35 concrete mix ratio using ballast

Particular cement to ballast mix ratio to create C35 grade of concrete should be 1:3 (1 part of cement mix to 3 parts of ballast. Ballast is premix of sharp sand and course gravel or aggregate. This grade of concrete used for structural piling and creating external slabs and walls.

◆ What is the 10-20-30-40 rule in concrete mixing?

◆ How many concrete blocks are required for 1 cubic meter?

◆ How much does a ton of concrete cover

◆ How many concrete blocks per m2

◆ Time for concrete to cure | Curing time of concrete

Conclusion:

The common concrete mix ratio to create C20 grade of concrete is 1 : 1.81 : 3.68 : 0.51 (cement: Sand: Stone: water) by weight. This means, 1m3 of C20 grade of concrete can be prepared by mixing of 1 part of cement (343kg of cement) + 1.81 parts of Sand (621kg of Sand) + 3.68 parts of Stone (1261 kg gravel) + 0.51 parts of water (175kg of water).