From: A Unified Formula for Calculation of Crack Width and Spacing in Reinforced Concrete Beams
Mixture | fcu (MPa) | fck (MPa) | fts (MPa) | Ec × 104 (MPa) | Age (days) | Batch number |
---|---|---|---|---|---|---|
C30 | 37.7 | 26.4 | 2.0 | 3.8 | 200 | 1 |
C40 | 42.6 | 32.3 | 2.7 | 3.7 | 250 | 2 |
C50 | 53.0 | 33.3 | 3.4 | 3.7 | 260 | 3 |
C60 | 66.3 | 61.8 | 3.3 | 4.1 | 290 | 4 |
C60 | 67.1 | 62.3 | 3.4 | 4.1 | 300 | 5 |