What should be the minimum grade of reinforced concrete in and around sea coast construction?

M 35

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M 30

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M 25

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M 20

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Solution

The correct option is B M 30

Exposure Minimum
grade of
plain
concrete Minimum
grade of
reinforced
concrete

(i) Mild
(ii) Moderate
(iii) Severe
(iv) Very severe
(v) Extreme -
M15
M20
M20
M25 M20
M25
M30
M35
M40

Concrete in sea water or exposed directly along the sea coast shall be at least M20 grade in the case of plain concrete and M30 in case of reinforced concrete. The use of slag or pozzolana cement is advantageous under such conditions.

Suggest Corrections

Exposure	Minimum grade of plain concrete	Minimum grade of reinforced concrete
(i) Mild (ii) Moderate (iii) Severe (iv) Very severe (v) Extreme	- M15 M20 M20 M25	M20 M25 M30 M35 M40