Table 7 Splitting tensile strength test results.
Specimen name | Splitting tensile strength (Unit: MPa) | Ratio of tensile strength at 7 days to strength at 28, 56 and 91 days | ||||||
|---|---|---|---|---|---|---|---|---|
7 days | 28 days | 56 days | 91 days | 7/28 | 7/56 | 7/91 | ||
Group I | FA15 | 3.4 | 3.5 | 3.9 | 4.0 | 0.97 | 0.87 | 0.85 |
FA25 | 2.6 | 3.2 | 3.6 | 3.6 | 0.81 | 0.72 | 0.72 | |
SF5 | 3.7 | 4.3 | 4.3 | 4.4 | 0.86 | 0.86 | 0.84 | |
BS25 + FA25 | 2.2 | 3.8 | 4.4 | 4.5 | 0.58 | 0.50 | 0.48 | |
BS30 + FA30 | 1.5 | 3.3 | 3.9 | 4.5 | 0.45 | 0.38 | 0.33 | |
BS50 | 2.6 | 4.1 | 4.9 | 5.0 | 0.63 | 0.53 | 0.52 | |
BS65 + SF5 | 2.1 | 3.7 | 4.3 | 4.8 | 0.57 | 0.49 | 0.44 | |
Group II | FA25 | 3.3 | 4.0 | 4.1 | 4.2 | 0.83 | 0.80 | 0.79 |
SF5 | 3.9 | 4.4 | 4.6 | 4.8 | 0.87 | 0.85 | 0.81 | |
BS25 + FA25 | 2.7 | 4.1 | 5.3 | 5.4 | 0.67 | 0.51 | 0.50 | |
BS30 + FA30 | 2.2 | 4.0 | 4.6 | 4.9 | 0.55 | 0.48 | 0.45 | |
BS50 | 2.9 | 4.7 | 5.4 | 5.5 | 0.62 | 0.54 | 0.53 | |
BS65 + SF5 | 2.5 | 4.2 | 5.0 | 5.1 | 0.60 | 0.50 | 0.49 | |
Group III | FA25 + SF5 | 4.2 | 5.3 | 5.9 | 5.9 | 0.79 | 0.71 | 0.71 |
SF5 | 4.9 | 5.1 | 5.2 | 5.9 | 0.96 | 0.94 | 0.83 | |
BS25 + FA20 + SF5 | 3.5 | 4.8 | 5.9 | 6.0 | 0.73 | 0.66 | 0.58 | |
BS30 + FA25 + SF5 | 2.8 | 5.3 | 5.4 | 5.6 | 0.53 | 0.52 | 0.50 | |
BS45 + SF5 | 4.0 | 4.9 | 5.5 | 5.6 | 0.82 | 0.73 | 0.71 | |
BS65 + SF5 | 3.0 | 4.9 | 5.0 | 5.2 | 0.61 | 0.60 | 0.58 | |