回收PE地膜残膜在高性能沥青路面新材料中应用

以回收聚乙烯（PE）地膜残膜为原料，通过与聚醋酸乙烯、石油树脂等材料复合，制备了新型路面沥青高分子改性剂。通过对改性剂和改性沥青混合料性能进行测试，结果表明，该PE改性剂的结晶度降低，低温柔韧性和抗冲击性能提高，具有较高的熔体流动速率；其与砂石等无机材料的黏合性能也较PE材料显著提高；该PE改性剂可以在拌合楼直接与石料混合搅拌，相对传统苯乙烯-丁二烯-苯乙烯嵌段共聚物（SBS）沥青改性技术，达到沥青混合料高低温性能的双性提升，避免SBS硫化过程的二氧化硫污染，提高公路高低温耐车辙性能，实现低品位塑料废弃物变废为宝，对于推动环境的可持续发展及绿色交通建设具有重大的意义。

Research in Application of Recycled PE Mulching Films for New Material of High Performance Asphalt Pavement

A novel type of pavement asphalt polymeric modifier was prepared through mixing recycled polyethylene mulch film residue with poly（vinyl acetate） and petroleum resin. The use of the modifier reduced the crystallinity of PE and improved its low temperature flexibility， impact resistance， high melt flow rate， and adhesive performance with sand inorganic materials. This modifier can be directly mixed and stirred with stone in the mixing plant. Compared to the traditional SBS asphalt modifier， the modifier developed by this work can improve the high and low temperature performance of asphalt mixture， avoid the sulfur dioxide pollution in the SBS vulcanization process， improve the high and low temperature rutting resistance performance of highway， and realize the transformation of low-grade plastic waste to treasure. It is of great significance to promote the sustainable development of the environment and the construction of green traffics.