废弃聚乙烯/废弃聚丙烯共混物功能化改性沥青混合料性能研究

›› 2023, Vol. 37 ›› Issue (5): 40-47.

废弃聚乙烯/废弃聚丙烯共混物功能化改性沥青混合料性能研究

张文才¹,郝晓刚¹,裴强²,亢小丽³

1. 太原理工大学
2. 山西省交通科技研发有限公司
3. 太原市塑料研究所，山西省高分子材料研究与检测重点实验室

收稿日期:2023-01-10 修回日期:2023-02-15 出版日期:2023-05-26 发布日期:2023-05-26

Study on properties of asphalt functionally modified with waste polyethylene/waste polypropylene blends

Received:2023-01-10 Revised:2023-02-15 Online:2023-05-26 Published:2023-05-26

摘要/Abstract

摘要： 通过双螺杆挤出分区加料技术制备三元共混改性剂（TBM），其中废弃聚乙烯/废弃聚丙烯/聚丙烯接枝马来酸酐（RPE/RPP/PP?g?MAH）质量比为6/4/0.7；以AC?20基质沥青混合料质量的0.4 %添加TBM，研究了不同湿拌和时间、不同拌合温度对AC?20改性沥青混合料动稳定度影响，分析了不同拌合时间对TBM在改性沥青混合料中的形态变化的影响，比较了0、0.2 %、0.3 %、0.4 %、0.5 %TBM含量（以AC?20基质沥青混合料质量计）对AC?20改性沥青混合料高低温性的影响。结果表明，在干拌和工艺条件下，干拌和时间30 s，湿拌和时间不低于180 s且湿拌和温度为170 ℃时高温性能最佳，且TBM改性AC?20中其最佳含量为0.4 %。

关键词: 废弃聚乙烯, 废弃聚丙烯, 共混物, 改性沥青混合料, 性能

Abstract: In this paper， ternary blending modifier （TBM） made of the waste polyethylene （RPE）/waste polypropylene （RPP）/polypropylene grafted maleic anhydride blend with a mass ratio of 6/4/0.7 was prepared through twin?screw extrusion together with a zonal feeding technique. The effect of different mixing time and temperature on the dynamic stability of the modified AC?20?based asphalt was studied. The morphological evolution of TBM in the modified asphalt was analyzed with a variation of mixing time. The effect of TBM content on the high?temperature and low?temperature properties of the modified asphalt was compared at TBM contents of 0， 0.2， 0.3， 0.4， and 0.5 wt%. The results indicated that under the conditions of a dry mixing time of 30 s， a wet mixing time of not less than 180 s， and a wet mixing temperature of 170 ℃， the optimum content of TBM for the modified asphalt was 0.4 wt%. This work provides a theoretical basis for the applications of RPE and RPP blends in the modified asphalt.

Key words: recycled polyethylene, recycled polypropylene, blend, modified asphalt mixture, property

张文才郝晓刚裴强亢小丽. 废弃聚乙烯/废弃聚丙烯共混物功能化改性沥青混合料性能研究[J]. , 2023, 37(5): 40-47.

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