21
The minimum grade of plain concrete in sea-water or exposed directly along the sea coast shall be at least:
- AM 10
- BM 15
- CM 20
- DM 25
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Concrete in Sea-water (as per IS 456: 2000)
Concrete in sea-water or exposed directly along the sea-coast shall be at least M 20 Grade in the case of plain concrete and M 30 in case of reinforced concrete. The use of slag or pozzolana cement is advantageous under such conditions.
Exposure
Minimum grade of
Plain Concrete
Minimum grade of
reinforced concrete
Mild
-
M20
Moderate
M15
M25
Severe
M20
M30
Very severe
M20
M35
Extreme
M25
M40
Concrete in sea-water or exposed directly along the sea-coast shall be at least M 20 Grade in the case of plain concrete and M 30 in case of reinforced concrete. The use of slag or pozzolana cement is advantageous under such conditions.
Exposure
Minimum grade of
Plain Concrete
Minimum grade of
reinforced concrete
Mild
-
M20
Moderate
M15
M25
Severe
M20
M30
Very severe
M20
M35
Extreme
M25
M40