DAT与SA温拌排水沥青混合料路用性能对比

Pavement Performance Comparison Between DAT and SA Warm Porous Asphalt Mixture

为研究SA与DAT分别对排水沥青混合料的路用性能影响。首先,采用马歇尔试验确定热拌排水沥青混合料的最佳配合比;其次,对掺加SA与DAT的混合料进行路用性能试验。试验表明:温拌排水沥青混合料击实温度可降为155℃;SA与DAT温拌剂对排水沥青混合料降温幅度相近,但是前者抗车辙性能明显优于后者;低温性能略低于后者;水稳定性两者相近。因此,温拌技术应用于排水沥青路面通过外掺温拌剂法是可以实现的,并且优先选用SA作温拌剂。由此提出了一种低碳环保的绿色筑路技术。

This paper mainly discusses effects of Sasobit（SA）and DAT on the pavement performance of porous asphalt mixture. Firstly,the optimum mixture ratio of hot porous asphalt mixture is decided through Marshall test. Then,pavement performance tests are conducted in SA and DAT porous asphalt mixture. Tests show that SA and DAT additives can produce appropriate temperature drop range with 155 ℃ as the suitable compaction temperature for warm porous asphalt mixture. Besides,the anti-rutting performance of the former is obviously better,while the latter low temperature performance is better,though water stability of them is similar. The paper proposes a new technology for green road construction by using SA and DAT additives in warm porous asphalt mixture with SA as a preferable additive.