Grade of Concrete and their Ratio

their ratio, which is too much important for civil engineers.

What is Grade of Concrete:

Grade of Concrete is the base of strength and we have different grade of Concrete which are given below.
M10
M15
M20
M25
M30
M35
Here M stands for Mix and Number is the minimum compressive strength of concrete after 28 day which is direct compressive test.

Grade of Concrete and Their Ratio:

Grade of Concrete                             Mix Ratio
M10                                                       1: 3: 6
M15                                                       1: 2 : 4
M20                                                       1 : 1.5 : 3
M25                                                       1 : 1 : 2
M30                                                     Base on Mix Design
M35                                                     Base on Mix Design
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