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Concrete Grades: Types And Usage

Strength and composition of the concrete defined the grades of concrete. The minimum strength should follow 28 days of initial construction. The measurement to understand the grade of concrete is MPa. Here M stands for mix and an MPa shows the overall strength.

Concrete mixer is defined in ascending order of 5. It starts at 10. The compressive strength of concrete shows after 28 days. C10 has the strength of 10 newtons, C15 has the strength of 15 newtons, C20 has 20 newtons strength.

M comes in different mix proportions of various ingredients of cement, sand and coarse aggregates. M20 comes in the respective ratio of 1:1:5:3.

Concrete Grade Mix Ratio (cement:sand: agregats) Compressive Strength
MPa (N/mm2)
Compressive Strength
psi
Grades of Concrete
M5 1 : 5 : 10 5 MPa 725 psi
M7.5 1 : 4 : 8 7.5 MPa 1087 psi
M10 1 : 3 : 6 10 MPa 1450 psi
M15 1 : 2 : 4 15 MPa 2175 psi
M20 1 : 1.5 : 3 20 MPa 2900 psi

Standard Grade of Concrete
M25 1 : 1 : 2 25 MPa 3625 psi
M30 Design Mix 30 MPa 4350 psi
M35 Design Mix 35 MPa 5075 psi
M40 Design Mix 40 MPa 5800 psi
M45 Design Mix 45 MPa 6525 psi
High Strength Concrete Grades
M50 Design Mix 50 MPa 7250 psi
M55 Design Mix 55 MPa 7975 psi
M60 Design Mix 60 MPa 8700 psi
M65 Design Mix 65 MPa 9425 psi
M70 Design Mix 70 MPa 10150 psi

Concrete Grades and their use

C10

This concrete grade is used for Patio slabs, pathways and non structural work. This is mainly used in domestic and commercial use.

C15

This concrete grade is used for pavement kerbs and floor blinding.. This is mainly used in domestic and commercial use.

C20

This concrete grade is used for domestic floors and foundations, workshop bases, garages, driveways and internal floor slabs. This is mainly used in domestic use.

C25

This concrete grade is used for all areas specially for multi purpose concrete mix and foundation. This is mainly used in domestic and commercial use.

C30

This concrete grade is used for pathways and roadways. This is mainly used in commercial use. This concrete grade is much more flexible, good weather resistant and carries heavy road traffic.

C35

This concrete grade is used in commercial structures. This is mainly used to create external walls and slabs, structural piling. This is mainly used in commercial use.

C40

This concrete grade is mainly used for commercial construction sites, to create foundations and beams for structural support and roads.

This concrete grade is most durable among others, C40 can prevent chemical erosion also. So this is used on farms, or in septic tanks. The type is Commercial.

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Concrete Grades: Types And Usage