Research Article
Structural Concrete Prepared with Coarse Recycled Concrete Aggregate: From Investigation to Design
Table 3
Mixture proportions of concretes made of 30% coarse recycled aggregates.
| | Mixture | CRA-I-0.40 | CRA-II-0.40 | CRA-I-0.45 | CRA-I-0.50 | CRA-II-0.50 | CRA-I-0.55 | CRA-I-0.60 | CRA-II-0.60 |
| | Water/cement | 0.40 | 0.40 | 0.45 | 0.50 | 0.50 | 0.55 | 0.60 | 0.60 | | Water, kg | 140 | 140 | 153 | 165 | 165 | 176 | 186 | 186 | | Cement 42.5R, kg | 350 | — | 340 | 330 | — | 320 | 310 | — | | Cement 32.5R, kg | — | 350 | — | — | 330 | — | — | 310 | | Quartz sand, kg (% in volume) | 732 (40) | 732 (40) | 723 (40) | 715 (40) | 715 (40) | 708 (40) | 702 (40) | 702 (40) | | Fine gravel, kg (% in volume) | 553 (30) | 553 (30) | 547 (30) | 541 (30) | 541 (30) | 535 (30) | 531 (30) | 531 (30) | | Coarse recycled aggregate, kg (% in volume) | 523 (30) | 523 (30) | 517 (30) | 511 (30) | 511 (30) | 506 (30) | 501 (30) | 501 (30) | | Superplasticizer, % by weight of cement | 1.2 | 1.2 | 1.0 | 0.8 | 0.8 | 0.6 | 0.4 | 0.4 |
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