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In order to evaluate the feasibility of the application of drainage asphalt mixture with small particle sized aggregate in the maintenance of ultra-thin asphalt overlay, the rutting test, low-temperature bending test, freeze-thaw split test, Cantabro dispersion test, permeability test and pendulum friction coefficient test were conducted to evaluate the pavement performance and functional property of 8 drainage asphalt pavement composed of 4 kinds of asphalt binder and 2 gradation forms. And it was compared with large particle sized aggregate drainage asphalt mixture (OGFC-13). The results show that the asphalt mixture with PAC-5 gradation is better than OGFC-5 gradation in the form of high and low temperature performance, water stability, skid resistance and drainage performance. But the low temperature performance and water stability is inferior to OGFC-13 mixture. Epoxy asphalt binder is conducive to improve the overall pavement performance of drainage asphalt pavement, however, the functional properties such as drainage and anti-sliding have declined. Meanwhile, due to the expensive cost, SBS-SPT modified asphalt can be used as a substitute. Therefore, considering the results of various performance tests and economic costs, when using PAC-5 gradation, SBS modified asphalt and II modifier, the performance of drainage asphalt mixture with small particle sized aggregate is the best, which is expected to be widely applied to the maintenance of ultra-thin asphalt overlay.
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| 科 Family | 属数 Number of genus | 种数 Number of species | 占总种数比例 Percentage of total species (%) | 属 Genus | 种数 Number of species | 占总种数比例 Percentage of total species (%) |
|---|---|---|---|---|---|---|
| 鹅膏菌科Amanitaceae | 2 | 11 | 5.26 | 鹅膏菌属 Amanita | 10 | 4.78 |
| 小菇科 Mycenaceae | 2 | 12 | 5.74 | 丝盖伞属 Inocybe | 5 | 2.39 |
| 多孔菌科 Polyporaceae | 8 | 14 | 6.70 | 蜡蘑属 Laccaria | 5 | 2.39 |
| 红菇科 Russulaceae | 3 | 23 | 11.00 | 小皮伞属 Marasmius | 6 | 2.87 |
| 小菇属 Mycena | 11 | 5.26 | ||||
| 光柄菇属 Pluteus | 5 | 2.39 | ||||
| 红菇属 Russula | 17 | 8.13 | ||||
| 栓菌属 Trametes | 5 | 2.39 |
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