Which of the following grades of concrete is recommended by BIS for moderate exposure condition ?

M10

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M15

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M20

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M25

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Solution

The correct option is D M25
According to BIS -
(Reinforced Concrete)

S.N. Conditions Minimum
cement
content
kg/ $m^{3}$ Maximum
free water
cement
Ratio Minimum
Grade of
Concrete

1 Mild 300 0.55 M20

2 Moderate 300 0.50 M25

3 Severe 320 0.45 M30

4 very
Severe 340 0.45 M35

5 Extreme 360 0.40 M40

Suggest Corrections

S.N.	Conditions	Minimum cement content kg/ $m^{3}$	Maximum free water cement Ratio	Minimum Grade of Concrete
1	Mild	300	0.55	M20
2	Moderate	300	0.50	M25
3	Severe	320	0.45	M30
4	very Severe	340	0.45	M35
5	Extreme	360	0.40	M40