合成材料老化与应用2024，Vol.53Issue(5)：25-28,35,5.
在役路面不同结构层沥青老化特性分析
Aging Characteristics of Asphalt in Different Structural Layers of In-service Pavement
摘要
Abstract
In order to analyze the comprehensive aging process and mechanism of asphalt pavement during use,three types of pavement structures of representative in-service road surfaces,namely bridge deck pavement,ordinary road sections,and ramps,were selected,and core samples were drilled separately.The different performance indicators of asphalt extracted from core samples were studied by gel permeation chromatography(GPC)analysis and Fourier transform infrared spectroscopy(FTIR)analysis.The aging degree of asphalt in different structural layers was analyzed and the impact of different pavement structural layers on asphalt aging was clarified.The results show that among the various structural layers of asphalt pavement,the upper layer of asphalt has the most severe aging degree,while the lower layer of asphalt has the weakest aging degree.Asphalt aging is mainly caused by oxidation,and the aging process follows the rule of asphalt macromolecular chain breaking into small molecules,increasing small molecule content,and increasing molecular weight width.After aging,the asphalt components will undergo changes,which in turn will affect the overall performance of pavement structure.关键词
工程材料/在役路面/结构层/沥青老化/微观特性/老化机理Key words
engineering materials/in-service pavement/structural layer/asphalt aging/microscopic characteristics/aging mechanism分类
交通运输引用本文复制引用
杨朝旭,涂慧慧,张畅,王笑风,殷卫永..在役路面不同结构层沥青老化特性分析[J].合成材料老化与应用,2024,53(5):25-28,35,5.基金项目
河南省交通运输厅科技项目(2020J-2-5) （2020J-2-5）
河南省交通运输厅科技项目(2019J1). （2019J1）
