东南大学学报（自然科学版）2026，Vol.56Issue(1)：10-19,10.DOI:10.3969/j.issn.1001-0505.2026.01.002
热塑性和热固性聚氨酯改性沥青混合料路用性能研究
Study on road performance of thermoplastic and thermosetting polyurethane modified asphalt mixtures
摘要
Abstract
Polyurethane(PU)modified asphalt is demonstrated as a promising material for highway and steel bridge deck pavement layers.Different formulations of thermoplastic and thermosetting PU modified asphalt were prepared,and the optimal formulation was selected.The road performance was further evaluated to deter-mine advantages and disadvantages compared with commonly used engineering mixtures.Results indicate that PU modified asphalt mixtures exhibit better flexibility and low-temperature cracking resistance than conven-tional mixtures.Thermosetting PU modified asphalt mixtures show the best rutting resistance,with dynamic stability values all exceeding 10 000 passes/mm.The high-temperature performance of thermoplastic PU modi-fied asphalt mixtures approaches that of SBS modified asphalt.Both thermoplastic and thermosetting PU modi-fied asphalt mixtures demonstrate significant low-temperature damage resistance.Flexural-tensile strength in-creases by 26.7％and 40.8％respectively compared with base asphalt mixtures.The low-temperature beam flexural tensile strain increased by 72％and 77％,respectively,compared with that of the base asphalt mix-ture.Overall performance differs substantially between the two mixture types.This difference is closely re-lated to the mass fraction and properties of the modified asphalt.The result demonstrates that binder perfor-mance requires adjustment according to different road environmental conditions.关键词
道路工程/聚氨酯/改性沥青/热塑性和热固性/沥青混合料/路用性能Key words
road engineering/polyurethane/modified asphalt/thermoplastic and thermosetting/asphalt mix-ture/road performance分类
交通工程引用本文复制引用
李辉,任家兴,黄旭坤,刘旭飞,左鑫..热塑性和热固性聚氨酯改性沥青混合料路用性能研究[J].东南大学学报（自然科学版）,2026,56(1):10-19,10.基金项目
科技部国家重点研发计划资助项目(2023YFE0121400) （2023YFE0121400）
上海科学技术委员会资助项目(23210711400) （23210711400）
河南省交通运输厅资助项目(2023-4-2). （2023-4-2）
