市政技术2026，Vol.44Issue(3)：263-271,9.DOI:10.19922/j.1009-7767.2026.03.263
环氧植物油再生剂在老化沥青中扩散融合行为分析
Analysis of the Diffusion and Fusion Behavior of Epoxy Plant Oil Rejuvenator in Aged Asphalt
摘要
Abstract
The regeneration effect of reclaimed asphalt pavement(RAP)is closely related to the diffusion and fusion characteristics of its rejuvenator in asphalt.The diffusion and fusion behavior of epoxidized plant oil(EPO)rejuve-nator in aged asphalt was systematically investigated.The interface diffusion law of EPO was studied by the interface image threshold method combined with the grayscale change characteristics of the image;Based on Fick's law of diffusion and composite material theory,the diffusion characteristics of EPO inside aged asphalt were studied;The fusion characteristics of EPO and aged asphalt were studied by monitoring the changes law in complex modulus and fusion degree.The research results indicate that there is a significant"step like"difference in grayscale values of them,that is,a large difference in grayscale values in the early stage of interface diffusion between EPO and aged asphalt,especially under low diffusion temperature conditions;With the extension of diffusion time and the increase of diffu-sion temperature,the grayscale values of EPO and aged asphalt gradually tend to be consistent;The diffusion coef-ficient of EPO in aged asphalt is influenced by the layer,diffusion time,and diffusion temperature,and the layer having the most significant effect;The fusion temperature is a key indicator.Increasing the fusion temperature can significantly increase the degree of fusion.To ensure sufficient fusion and diffusion of EPO in RAP,it is recom-mended that the total mixing time of EPO and RAP should be longer than 90 minutes,and the temperature should be above 155 ℃.This research result can provide reference for the engineering application of EPO regenerators or EPO based oil rejuvenator.关键词
道路工程/环氧植物油再生剂/RAP/老化沥青/融合扩散行为/菲克定律Key words
road engineering/epoxy plant oil rejuvenator/reclaimed asphalt pavement(RAP)/aged asphalt/fusion diffusion behavior/Fick's law of diffusion分类
交通工程引用本文复制引用
黄治国,王志祥,阳杰,陈富廉,唐光明..环氧植物油再生剂在老化沥青中扩散融合行为分析[J].市政技术,2026,44(3):263-271,9.基金项目
广东省交通集团科技项目(JT2023YB11) （JT2023YB11）
