Grade of Concrete

Grade of Concrete

 The concrete shall be in grades designated as per Table 1

A).  The characteristic strength is defined as the strength of material below which not more than 5 percent of the test results are expected to fall.

B). The minimum grade of concrete for plain and reinforced concrete shall be as per Table 2

C).  Concrete of grades lower than those given in Table 1 may be used for plain concrete constructions. lean concrete, Simple foundations, foundation for masonry walls and other simple or temporary reinforced concrete construction.

S.No.	Group	Grade Designation	Specified Characteristic Compressive Strength of 150 mm Cube at 28 Days In N/sq.mm
A	B	C	D
1	Ordinary Concrete	M 10	10
2		M 15	15
3		M 20	20
4	Standard Concrete	M 25	25
5		M 30	30
6		M 35	35
7		M 40	40
8		M 45	45
9		M 50	50
10		M 55	55
11	High Strength Concrete	M 60	60
12		M 65	65
13		M 70	70
14		M 75	75
15		M 80	80
Note:-
1.       In the designation of concrete mix M refers to the mix and the number to the specified compressive strength of 150 mm size cube at 28 days, expressed in N/sq.mm
2.       For concrete of compressive strength greater than M 55, design parameters given in the standard may not be applicable and the values may be obtained from specialized literatures and experimental results.

 

www.EveryOneEngineer.com A Good Quality Construction is a Result of Good Knowledge. Keep Learning....Keep Growing.... Thank You, Have a Nice Day,