中国塑料 ›› 2025, Vol. 39 ›› Issue (8): 113-119.DOI: 10.19491/j.issn.1001-9278.2025.08.018

• 塑料与环境 • 上一篇    下一篇

不同掺量废旧聚对苯二甲酸乙二醇酯粉末对沥青混合料的性能影响研究

索书武1, 沈继勇1, 王鹏1, 郝贡欣2,3, 景宏君2,3, 李志刚2,3, 李海滨2,3()   

  1. 1.商洛市公路局,陕西 商洛 726000
    2.西安科技大学建筑与土木工程学院,西安 710054
    3.西安科技大学道路工程研究中心,西安 710054
  • 收稿日期:2024-09-16 出版日期:2025-08-26 发布日期:2025-07-30
  • 通讯作者: 李海滨(1980—),男,教授,从事废旧材料在道路工程的循环利用研究,lihaibin1212@126.com
    E-mail:lihaibin1212@126.com
  • 基金资助:
    国家自然科学基金(52308466);陕西省交通科技项目(24?19K);陕西省交通科技项目(24?20K)

Effect of addition amount of poly(ethylene terephthalate) waste plastic on performance of asphalt mixture

SUO Shuwu1, SHEN Jiyong1, WANG Peng1, HAO Gongxin2,3, JING Hongjun2,3, LI Zhigang2,3, LI Haibin2,3()   

  1. 1.Shangluo Highway Bureau,Shangluo 726000,China
    2.School of Architecture and Civil Engineering,Xi′an University of Science and Technology,Xi′an 710054,China
    3.Road Engineering Research Center,Xi′an University of Science and Technology,Xi′an 710054,China
  • Received:2024-09-16 Online:2025-08-26 Published:2025-07-30
  • Contact: LI Haibin E-mail:lihaibin1212@126.com

摘要:

以废旧聚对苯二甲酸乙二醇酯(PET)塑料粉末作为改性剂,干拌法制备PET改性沥青混合料。采用马歇尔稳定度测定仪、全自动车辙试验机、及弯曲疲劳试验机,系统地探究了PET改性沥青混合料的高温稳定性能、低温抗裂性能及水稳定性能,对比分析PET粉末掺量变化对沥青混合料路用性能的影响。结果表明:PET粉末能够提高沥青混合料的高温稳定性和水稳定性能,改善其低温抗裂性能。5.5 %(质量分数,下同)PET掺量复合1.0 %助粘剂时,与基质沥青混合料相比,改性沥青混合料的动稳定度提高173.6 %,弯拉破坏强度和弯拉破坏应变分别提高20.3 %和22.9 %,浸水残留稳定度与残留强度比与分别提高16.3 %和7.9 %,说明废旧PET粉末在道路沥青混合料中的应用具有明显优势,为废旧塑料的资源化利用提供了新的途径。

关键词: 道路工程, 沥青混合料, 聚对苯二甲酸乙二醇酯, 高温稳定性能, 低温抗裂性能, 水稳定性能

Abstract:

This study developed an innovative approach for waste plastic recycling by utilizing poly(ethylene terephthalate) (PET) powders as a modifier in asphalt mixtures through dry mixing. The road performance of PET⁃modified asphalt mixtures was systematically evaluated, including high⁃temperature stability, low⁃temperature crack resistance, and water stability using Marshall stability, rutting, and bending fatigue tests. Results indicated that PET powders significantly enhanced all key performance properties. At an optimal composition of 5.5 wt% PET powders and 1.0 wt% adhesive in mixture, the modified mixture exhibited remarkable improvements: 173.6 % increase in dynamic stability, 20.3 % and 22.9 % enhancement in flexural tensile strength and strain, respectively, along with 16.3 % and 7.9 % improvements in residual stability and strength after water immersion. These findings demonstrate that waste PET powders not only upgrades asphalt performance but also provides an effective solution for sustainable plastic waste utilization in pavement engineering.

Key words: road engineering, asphalt mixture, poly(ethylene terephthalate), high temperature stability, low temperature crack resistance, water stability

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