Research Article
Structural Concrete Prepared with Coarse Recycled Concrete Aggregate: From Investigation to Design
Table 4
Compressive strengths (MPa) after 3 and 28 days.
| Curing times | 3 days | 28 days | Mixtures | Mean values | Standard deviations | Mean values | Standard deviations |
| REF-I-0.40 | 37.0 | 2.4 | 58.6 | 3.4 | REF-I-0.45 | 28.5 | 1.8 | 56.1 | 2.5 | REF-I-0.50 | 28.7 | 2.6 | 51.2 | 3.1 | REF-I-0.55 | 24.7 | 2.4 | 47.1 | 2.6 | REF-I-0.60 | 20.1 | 2.8 | 43.9 | 1.3 | REF-II-0.40 | 32.1 | 2.2 | 52.2 | 1.7 | REF-II-0.50 | 19.8 | 2.1 | 43.3 | 2.0 | REF-II-0.60 | 15.3 | 1.9 | 36.1 | 1.8 | CRA-I-0.40 | 29.7 | 1.3 | 46.1 | 3.2 | CRA-I-0.45 | 26.2 | 1.7 | 45.8 | 2.9 | CRA-I-0.50 | 22.2 | 2.3 | 39.9 | 3.7 | CRA-I-0.55 | 21.7 | 1.7 | 36.3 | 2.7 | CRA-I-0.60 | 15.5 | 1.8 | 34.7 | 1.6 | CRA-II-0.40 | 26.1 | 1.6 | 41.8 | 1.8 | CRA-II-0.50 | 16.4 | 1.9 | 35.1 | 1.8 | CRA-II-0.60 | 12.9 | 1.7 | 29.2 | 1.9 |
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