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Assumed standard deviation for M25 grade of concrete as per IS 10262:2009 (in N/mm2 ) is-

Question

Assumed standard deviation for M25 grade of concrete as per IS 10262:2009 (in N/mm2 ) is-

3.5

4.0

5.0

5.5

Solution

Correct option is B

SI. No	Grade of Concrete	Characteristic compressive strength (N/mm²)	Assumed standard deviation (N/mm2)
1.	M10	10
2.	M15	15	3.5
3.	M20	20
4.	M25	25	4.0
5.	M30	30
6.	M35	35	5.0
7.	M40	40
8.	M45	45
9.	M50	50
10.	M55	55

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