Per Table 10.5 (durability in mix design), the MINIMUM cement content …

Question

Per Table 10.5 (durability in mix design), the MINIMUM cement content for REINFORCED concrete in 'severe' exposure is:

Accepted Answer

D. {'text': '360 kg/m³ at w/c ≤ 0.45', 'label': 'D'}

1. Table 10.5: Reinforced concrete cement minima and max w/c — Mild: 250 kg/m³, 0.65; Moderate: 290, 0.55; Severe: 360 kg/m³, w/c ≤ 0.45.
2. The same severity row caps plain concrete at 310 kg/m³ at w/c ≤ 0.5.
_Source: IGNOU ET-522 Block-3 Unit-10 Concrete Mix Design, Table 10.5, §10.8 Step 2, p. 17_

Answer

{'text': '220 kg/m³ at w/c ≤ 0.7', 'label': 'A'}

Answer

{'text': '250 kg/m³ at w/c ≤ 0.65', 'label': 'B'}

Answer

{'text': '290 kg/m³ at w/c ≤ 0.55', 'label': 'C'}