Table 2: Selected times during cover concrete cracking evolution.

TimeConcrete crack evaluation

0.014 yearCracking initiation at internal boundary
0.97 yearCritical cracks developed at internal boundary
1.83 yearsCracks reaching at external surface
1.84 yearsCracks just occurred at external surface
11.2 yearsCracks reaching 1 / 2 ultimate cohesive width at external boundary
42.9 yearsCracks reaching ultimate cohesive width over concrete cover