Question
Download Solution PDFAs per IS 456:2000, what is the maximum water-cement ratio for M30 concrete with severe exposure conditions?
Answer (Detailed Solution Below)
Detailed Solution
Download Solution PDFExplanation:
As per IS 456: 2000, Table 5;
|
Environment |
Minimum grade |
Minimum grade |
Nominal Cover |
|
1. Mid |
M 20 |
- |
20 mm |
|
2. Moderate |
M 25 |
M 15 |
30 mm |
|
3. Severe |
M 30 |
M 20 |
45 mm |
|
4. Very severe |
M 35 |
M 20 |
50 mm |
|
5. Extreme |
M 40 |
M 25 |
75 mm |
According to IS 456: 200, the Minimum cement content and maximum water-cement ratio based on exposure conditions for plain cement concrete and reinforced cement concrete are given below:
| Exposure condition | Minimum cement content (kg/m3) | maximum water-cement ratio | Minimum cement content (kg/m3) | maximum water-cement ratio |
| PCC | RCC | |||
| Mild | 220 | 0.6 | 300 | 0.55 |
| Moderate | 240 | 0.6 | 300 | 0.5 |
| Severe | 250 | 0.5 | 320 | 0.45 |
| Very severe | 260 | 0.45 | 340 | 0.45 |
| Extreme | 280 | 0.40 | 360 | 0.4 |
Last updated on Jul 2, 2025
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