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concrete cover concrete cover

Figure 4.3: Reliability index versus concrete cover for environmental class XC3 (w/c=0,55, service life 50 years) a) for CEM 142,5 R (curing 2 days) b) for CEM III/B 42,5 NW HS NA (curing 3 days)

4.3.2.3 Environmental class XC4

For environmental class XC4, the w/c-value is reduced to 0,5 and compared to the environmental classes XC2 and XC3 the concrete cover is increased by 5 mm. This has a considerable effect on the reliability index (compare Figures 4.1a, 4.2a and 4.3a). Although the required reliability index according to Table 4.1 is increased to 2,0 for XC4 all concrete covers are still above the value for

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