期刊论文

Self-healing Mechanism of Bio-oil Recycled Asphalt

中文

中国公路学报

1001-7372

2019

32

4

235-242

10.19721/j.cnki.1001-7372.2019.04.021

山西省重点研发计划-国际合作项目(201603D421027) 山西省科技成果转化引导专项项目(201804D131034) 山西交通控股集团有限公司科技项目(18-JKKJ-13).

本校为第一机构

对再生沥青进行流变性能测试、微观结构表征、结构特性分析及宏观性能测试,研究生物油对老化沥青自愈合性能的影响,建立了再生沥青微观结构和宏观性能的构效关系。借助分子动力学软件及Wool-O’Connor自愈合模型计算得到最佳愈合温度时的最短愈合时间。研究结果表明:生物油再生沥青(BRA)的愈合行为包括黏性流动和弹性恢复,在高温(60℃和80℃)环境下,BRA的愈合行为取决于黏性流动,而在低温(20℃和40℃)环境下BRA的愈合行为取决于弹性恢复。在60℃的愈合试验温度、5%的疲劳应变条件下,BRA的最佳愈合时间为30 min,最短完全愈合时间为32 min;试验结果和模型计算结果相近,自愈合模型可较好地分析BRA的...

To understand the self-healing mechanism of bio-oil recycled asphalt (BRA), rheological properties, microstructure characteristics, and macroscopic properties of recycled asphalt were studied. The structure-function relationship between the microstructure and the macroscopic properties of recycled asphalt was established. Molecular dynamics software and Wool-O'Connor model were used to calculate the shortest healing temperature and minimum healing time. The self-healing mechanism of BRA includes viscous flow and elastic recovery. Viscous flow w...