Table 6 Difference of the critical time to corrosion initiation \( \Delta t_{{Cr}{-}{slab}} \) of the RC plane element and of the RC element with circular cross-section \( t_{{Cr}{-}{circular}} \).
∆t (year) | R = 20 cm | R = 30 cm | R = 40 cm | R = 50 cm | R = 100 cm | R = 150 cm |
|---|---|---|---|---|---|---|
w/c = 0.50 | 6.1 | 4.2 | 3.2 | 2.5 | 1.3 | 0.8 |
w/c = 0.45 | 12.3 | 8.4 | 6.4 | 5.1 | 2.6 | 1.7 |
w/c = 0.40 | 24.6 | 16.7 | 12.7 | 10.2 | 5.1 | 3.4 |