不同高模量改性沥青及混合料性能评价

Performance Evaluation of Different High Modulus Modified Asphalt and Mixtures

为使高模量沥青在拥有优异高温性能的同时兼具较好的低温性能,以基于抗车辙母粒制备的添加不同增强剂复合改性的高模量剂HM-Ⅰ和HM-Ⅱ为研究对象,并以抗车辙母粒HM-0为平行对照,分别就3种高模量沥青及高模量沥青混合料的性能进行对比评估。结果表明:与HM-0相比,HM-Ⅰ和HM-Ⅱ高模量剂均能提升沥青及混合料的高低温性能,其中,HM-Ⅱ的提升效果最为显著,但对沥青的施工和易性影响较小;HM-Ⅰ改善了沥青的施工和易性,且对沥青混合料水稳定性的提升效果优于HM-Ⅱ,但对沥青及混合料高低温性能的提升效果不如HM-Ⅱ。

In order to enhance the high-temperature performance and good low-temperature performance of high-modulus asphalt,this study focuses on the use of different reinforcing agents,namely HM-Ⅰ and HM-Ⅱ,which are composite-modified high-modulus agents prepared with an anti-rutting masterbatch.The performance of three types of high-modulus asphalt and high-modulus asphalt mixtures was evaluated by comparing them with the control group using the anti-rutting masterbatch.The results indicate that both HM-Ⅰ and HM-Ⅱ high modulus agents can enhance the high and low temperature properties of asphalt and mixtures,with HM-Ⅱ showing the most significant improvement.However,HM-Ⅱ has a relatively small impact on the workability of asphalt construction,whereas HM-Ⅰ improves it.Although HM-Ⅰ has limited impact on the high and low temperature properties of asphalt and mixtures,it demonstrates better water stability improvement in asphalt mixtures compared to HM-Ⅱ.