Research Article
Evaluating Iraqi Modified Asphalt Concrete Moisture Resistance Based on Strength Ratio and Fracture Energy Parameters
Table 1
Rheological characteristics of the Daurah bitumen.
| | Type of asphalt | | | Daurah PG 64-16 | | Parameter | Standard specification | Temperature measured | Parameter measured | Requirements |
| | Aging | | | Original binder |
| | Rotational viscosity (Pa·s) | ASTM D 4402 | 135°C | 0.544 | 3 (max.) | | Dynamic shear rheometer (DSR) /sin δ (kPa) | ASTM D 7175 | 64°C | 2.15 | 1 (min.) | | 70°C | 0.923 | | Ductility (5 cm/min) | ASTM D 113 | 25°C | >100 | >100 |
| | Aging | | Rolling thin film oven (RTFO) residue |
| | Dynamic shear rheometer (DSR) /sin δ (kPa) | ASTM D 7175 | 70°C | 1.91 | 2.2 (min.) | | ASTM D 2872 | | Mass loss (%) | ASTM D 2872 | 0.55 | 1 (max.) |
| | Aging | | Pressure aging vessel (PAV-110 C) residue |
| | Dynamic shear rheometer (DSR) /sin δ (kPa) | ASTM D 7275 | 34°C | 3300 | 5000 (max.) | | ASTM D 6521 | | Bending beam rheometer (BBR) creep stiffness (MPa) | ASTM D 05 | −16°C | 185 | 300 (max.) | | Bending beam rheometer (BBR) | ASTM D 6648 | −16°C | 0.41 | 0.3 (min.) |
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