Table 6 Compressive strength results (Unit: MPa).
Specimen ID | 3Â days | 7Â days | 28Â days | 190Â days | ||||
|---|---|---|---|---|---|---|---|---|
Measured | Avg. (COV) | Measured | Avg. (COV) | Measured | Avg. (COV) | Measured | Avg. (COV) | |
30-R0 | 18.6/17.6/19.2 | 18.5 ± 0.7 (3.8%) | 25.5/25.9/25.8 | 25.7 ± 0.2 (0.8%) | 45.4/47.5/47.7 | 46.9 ± 1.0 (2.1%) | 49.0/59.8/57.1 | 55.3 ± 4.6 (8.3%) |
30-R15 | 16.4/16.8/16.8 | 16.7 ± 0.2 (1.2%) | 24.0/24.8/24.9 | 24.6 ± 0.4 (1.6%) | 45.0/41.7/42.6 | 43.1 ± 1.4 (3.2%) | 49.4/50.2/- | 49.8 ± 0.4 (0.8%) |
30-R30 | 15.5/15.6/15.8 | 15.6 ± 0.1 (0.6%) | 23.7/21.6/22.5 | 22.6 ± 0.9 (4.0%) | 37.4/33.3/39.4 | 36.7 ± 2.5 (6.8%) | 48.8/45.5/52.3 | 48.9 ± 2.8 (5.7%) |
30-R50 | 13.1/13.4/13.8 | 13.4 ± 0.3 (2.2%) | 18.5/20.0/18.8 | 19.1 ± 0.6 (3.1%) | 35.5/35.8/34.0 | 35.1 ± 0.8 (2.3%) | 43.4/43.2/40.3 | 42.3 ± 1.4 (3.3%) |
30-R100 | 13.8/13.9/13.4 | 13.7 ± 0.2 (1.5%) | 20.0/20.4/20.0 | 20.1 ± 0.2 (1.0%) | 33.8/33.2/33.6 | 33.5 ± 0.2 (0.6%) | 41.5/37.1/- | 39.3 ± 2.2 (5.6%) |
60-R0 | 42.6/40.5/40.6 | 41.2 ± 1.0 (2.4%) | 51.0/51.5/50.2 | 50.9 ± 0.5 (1.0%) | 69.1/64.9/66.7 | 66.9 ± 1.7 (2.5%) | 80.2/81.2/77.5 | 79.6 ± 1.6 (2.0%) |
60-R15 | 40.5/41.8/41.8 | 41.4 ± 0.6 (1.5%) | 52.4/48.4/50.8 | 50.5 ± 1.6 (3.2%) | 69.8/70.5/65.4 | 68.6 ± 2.3 (3.4%) | 80.5/79.2/79.4 | 79.7 ± 0.6 (7.5%) |
60-R30 | 40.1/39.9/41.2 | 40.4 ± 0.6 (1.5%) | 46.2/46.4/47.0 | 46.5 ± 0.3 (6.5%) | 61.0/65.4/65.1 | 63.8 ± 2.0 (3.1%) | 76.4/76.4/75.7 | 76.2 ± 0.3 (0.4%) |
60-R50 | 43.2/42.7/43.4 | 43.1 ± 0.3 (0.7%) | 49.5/48.2/50.2 | 49.3 ± 0.8 (1.6%) | 67.4/66.3/67.7 | 67.1 ± 0.6 (0.9%) | 80/76.9/80 | 79.0 ± 1.5 (1.9%) |
60-R100 | 42.1/43.3/42.2 | 42.5 ± 0.5 (1.2%) | 51.5/50.6/49.3 | 50.5 ± 0.9 (1.8%) | 65.8/55.2/64.0 | 61.7 ± 4.6 (7.5%) | –/–/– | – |