Research Article
Pavement and Noise Reduction Performance of Open-Graded Asphalt Friction Course Improved by Waste Tire Crumb Rubber
Table 3
Physical index of aggregate.
| Stone | Index | Test results | Requirements |
| Coarse aggregate | Apparent density (g·cm−3) | 2.767 | ≥2.50 | Gross volume density (g·cm−3) | 2.712 | - | Crushing value (%) | 6.5 | ≤26 | Los Angeles attrition rate (%) | 7.8 | ≤28 | Flat and elongated particles (%) | 10 | ≤15 | Water absorption (%) | 0.8 | ≤2.0 | Fine aggregate | Apparent density (g·cm−3) | 2.700 | ≥2.50 | Mineral powder | Apparent density (g·cm−3) | 2.715 | - |
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