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WHAT ARE DIFFERENT GRADES OF CONCRETE

Hello Everyone. In this blog we will discuss about WHAT ARE DIFFERENT GRADES OF CONCRETE that are used in Civil Construction.

WHAT ARE DIFFERENT GRADES OF CONCRETE


The concrete mix design are designated into the following seven grades:
M10, M15, M20, M25, M30, M35, M40.The letter M refers to the mix and the number refers to the specified characteristic compressive strength of a 150 mm cube at 28 days expressed in Mpa.

The concrete is mainly divided into two categories:
Ordinary concrete: The concrete in which no preliminary tests are performed for designing the mix is called ordinary concrete. The ordinary concrete is used for M10, M15, M20, M25 grades of concrete mixes.
Controlled concrete: The concrete in which preliminary tests are performed for designing the mix is called controlled concrete. The controlled concrete is used for all the seven grades of concrete mixes.

The proportions of different ingredients in the concrete mix are as follow:
S.No
Grade
Concrete mix
Uses
1
M10
1:3:6
Mass concrete in piers, abutments, massive reinforced concrete members.
2
M15
1:2:4
Normal RCC works ( slabs, columns, beams, walls, small span arches)
3
M20
1:1.5:3
Water retaining structures ( reservoirs, columns & piles)
4
M25
1:1:2
1:4:8
Long span arches and highly loaded columns
5
M30
1:5:10
1:6:12
Mass concrete foundation
6
M35
--------
Post tensioned pre-stress concrete
Pre tensioned pre-stressed concrete
7
M40
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We hope that this articles will help you know about WHAT ARE DIFFERENT GRADES OF CONCRETE in civil engineering.

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