what are the different grades of concrete

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Different grades of concrete

based on Is 456-2000; Table-2 of concrete bridge code 1997 CS No.8 the concrete grades are classified as below. The ordinary concrete is Nominal mix where as standard and High strength concrete are Design mix



Group

Grade Designation
Specified Characteristic* Compressive Strength of 150 mm Cube at 28 Days in
N/mm2

Ordinary
Concrete
M5
5
M7.5
7.5
M10
10
M15
15
M20
20


Standard
Concrete
M25
25
M30
30
M35
35
M40
40
M45
45
M50
50
M55
55

High
Strength
Concrete
M60
60
M65
65
M70
70
M75
75
M80
80

Take a look at applications of ordinary concrete

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