Research Article
Development of a Correlation between the Resilient Modulus and CBR Value for Granular Blends Containing Natural Aggregates and RAP/RCA Materials
Table 2
Characterisation of the tested materials.
| | Material | Compaction characteristics (AASHTO T180) | | Maximum dry density (kN/m3) | Optimum moisture content (%) |
| | Natural aggregates | 21.9–23.3 | 5.5–7.1 | | RAPs | 19.7–21.4 | 6.4–9.1 | | RCA | 20.7 | 7.5 |
| | | Gradation characteristics (AASHTO T27-99) | | D10 (mm) | D30 (mm) | D50 (mm) | Cu | Cc | % Sand size (mm) | % (4.75–9.5) mm |
| | Natural aggregate A | 0.15 | 0.45 | 1 | 11.7 | 0.77 | 70 | 10 | | Natural aggregate F | 0.15 | 1.5 | 9 | 100.0 | 1.00 | 35 | 10 | | Natural aggregate W | 0.6 | 5 | 15 | 33.3 | 2.08 | 25 | 12 | | RAP(1) | 0.3 | 1.2 | 2.75 | 13.3 | 1.20 | 64 | 22 | | RAP(2) | 0.3 | 1.2 | 2.75 | 13.3 | 1.20 | 60 | 30 | | RAP(3) | 1.5 | 5 | 6.5 | 5.0 | 2.22 | 27 | 50 | | RAP(4) | 0.3 | 1.2 | 2 | 9.2 | 1.75 | 82 | 10 | | RCA | 0.25 | 1.5 | 6.5 | 40.0 | 0.9 | 40 | 18 |
| | | Flat and elongated particles (ASTM D 4791) | | Natural aggregates/RAPs/RCA | Limited to 6% |
| | | Shear strength parameters under quick shear test | | Natural aggregates/RAPs/RCA | Friction angle | Cohesion | | | 36°–43° | 20‒30 kPa |
| | | Physical properties of recovered bitumen binder | | RAPs | 60°C viscosity (poise) (ASTM D4402) | 25°C penetration (dmm) (ASTM D5-06) | Softening point (°C) (ASTM D36-76) | | | 23500–46700 | 20–52 | 62–67 |
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