Grade of concrete

 

Grades of Concrete as per IS:456-2000

Group	Grade Designation	Specific characteristic compressive strength of 1500mm cube at 28 days in N/mm2
Ordinary concrete	M10 M15 M20	10 15 20
Standard concrete	M25 M30 M35 M40 M45 M50 M55	25 30 35 40 45 50 55
High Strength Concrete	M60 M65 M70 M75 M80	60 65 70 75 80