Table 10 Estimated elastic modulus using the code equations.
Specimen ID | ACI 318-14 (2014)a | Model Code (2010)b | ||
|---|---|---|---|---|
\(E_{c} = 4.7\sqrt {f_{c} '}\) | \(E_{c} = 21.5\left( {f_{c} '/10} \right)^{1/3}\) | |||
Calculated (GPa) | Avg. (GPa) | Calculated (GPa) | Avg. (GPa) | |
30-R0 | 32.9/36.3/35.5 | 34.9 | 36.5/39.0/38.4 | 38.0 |
30-R15 | 33.0/33.3/– | 33.2 | 36.7/36.8/– | 36.7 |
30-R30 | 32.8/31.7/34.0 | 32.8 | 36.5/35.6/37.3 | 36.5 |
30-R50 | 31.0/30.9/29.8 | 30.6 | 35.1/35.0/34.2 | 34.8 |
30-R100 | 30.3/28.6/– | 29.5 | 34.6/33.3/– | 33.9 |
60-R0 | 42.1/42.4/41.4 | 41.9 | 43.0/43.2/42.5 | 42.9 |
60-R15 | 42.2/41.8/41.9 | 42.0 | 43.1/42.9/42.9 | 42.9 |
60-R30 | 41.1/41.1/40.9 | 41.0 | 42.3/42.3/42.2 | 42.3 |
60-R50 | 42.0/41.2/42.0 | 41.8 | 43.0/42.4/43.0 | 42.8 |