Aggregates | Tensile strength by bending CEM II | |||
7 days | 21 days | 28 days | ||
Natural sand | Average | 2.92 | 3.07 | 3.74 |
IC (95%) | [1.85 - 3.99] | [1.97 - 4.18] | [2.17 - 5.31] | |
Standard deviation | 1.09 | 1.13 | 1.60 | |
Improved sand | Average | 4.89 | 5.33 | 5.56 |
IC (95%) | [4.82 - 4.95] | [4.69 - 5.97] | [4.84 - 6.27] | |
Standard deviation | 0.06 | 0.57 | 0.63 |