Research Article
Effect of Polyester Fiber on Air Voids and Low-Temperature Crack Resistance of Permeable Asphalt Mixture
Table 8
Bending testing results at low temperature.
| | Fiber content (%) | Asphalt content (%) | Air voids (%) | Flexural tensile strength (MPa) | Maximum flexure tensile strain (με) | Flexural stiffness modulus (MPa) | | Single value | Average value | Single value | Average value | Single value | Average value |
| | 0 | 4.95 | 19.7 | 2.34 (−) | 3.57 | 1785 (−) | 1575 | 1311 (−) | 2273 | | 3.60 | 1575 | 2286 | | 3.87 | 1523 | 2542 | | 3.24 | 1682 | 1991 |
| | 0.3 | 5.0 | 19.4 | 5.19 | 5.02 | 3045 (−) | 2538 | 1704 | 1896 | | 4.93 | 2573 | 1916 | | 5.06 | 2415 | 2095 | | 4.91 | 2625 | 1870 |
| | 0.35 | 5.05 | 19.3 | 6.02 | 5.87 | 3203 | 3308 | 1880 | 1777 | | 5.84 | 3518 | 1660 | | 5.70 | 3098 | 1840 | | 5.90 | 3413 | 1729 |
| | 0.4 | 5.1 | 19.1 | 6.82 | 6.66 | 4043 | 4174 | 1687 | 1594 | | 8.19 (−) | 4148 | 1975 (−) | | 6.84 | 4305 | 1589 | | 6.32 | 4200 | 1505 |
| | 0.45 | 5.15 | 19.6 | 4.60 | 4.48 | 2258 | 2014 | 2038 | 2121 | | 4.61 | 1756 | 2625 | | 4.33 | 1890 | 2291 | | 4.38 | 2153 | 2035 |
| | 0.5 | 5.2 | 19.7 | 4.26 | 4.24 | 2100 | 2266 | 2029 | 1886 | | 4.37 | 2553 | 1712 | | 3.95 | 2363 | 1672 | | 4.36 | 2048 | 2129 |
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