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材料导报  2021, Vol. 35 Issue (Z1): 662-668    
  高分子与聚合物基复合材料 |
废植物油再生沥青紫外老化机理及路用性能
索智1, 陈欢1, 张奥2, 聂磊1
1 北京建筑大学土木与交通工程学院,北京102600
2 北京市道路工程质量监督站,北京100000
UV Aging Mechanism and Road Performance of Waste Vegetable Oil Recycled Asphalt
SUO Zhi1, CHEN Huan1, ZHANG Ao2, NIE Lei1
1 School of Civil Engineering and Transportation, Beijing University of Civil Engineering and Architecture, Beijing 102600, China
2 Beijing Road Engineering Quality Supervision Station, Beijing 100000, China
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摘要 废植物油具有黏度低、不饱和度高、热稳定性高的特点,可以调节由于沥青老化缺失的组分,分散老化沥青中的胶质。从组分和结构上重塑沥青微观特征。废植物油作为再生剂加入到老化沥青中,使其得到再生,但是由于植物油中不饱和碳链的存在使得再生沥青对紫外光更加敏感进而影响沥青的耐久性能。因而本文从微观和宏观两个方面对紫外老化前、后的沥青性能进行研究。首先通过四组分分析法、傅里叶变换红外光谱等试验揭示了紫外老化后废植物油再生沥青的微观变化,阐明废植物油再生沥青紫外老化的机理。 同时引入矿物油再生沥青和SK-70沥青通过DSR和BBR试验对比三种沥青的物理性能、流变性能和路用性能随紫外老化时间的变化规律,从宏观性能的角度阐明了紫外老化对SK-70沥青和两类再生沥青的影响。研究结果表明,经过紫外老化后相较于其他两种沥青,废植物油再生沥青中轻组分散失较为严重,组分和官能团的变化最为明显,其中官能团的变化量为SK-70沥青的3倍,抗紫外老化能力较差。紫外老化过后,三种沥青评价高、中、低温性能的各项指标变化均一致,说明三种沥青经过老化后各项性能的变化一致:高温性能得到提升,而对于低温和中温性能则有所衰减,其中性能变化最为明显的为废植物油再生沥青。
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索智
陈欢
张奥
聂磊
关键词:  抗紫外老化  废植物油  微观变化  流变性能    
Abstract: Waste vegetable oil has the characteristics of low viscosity, high unsaturation and high thermal stability. It can adjust the components missing due to asphalt aging and disperse the gum in aging asphalt. The micro characteristics of asphalt were remolded from the composition and structure. Waste vegetable oil is added to the aged asphalt as a regenerant to regenerate it. However, the presence of unsaturated carbon chain in vegetable oil makes the recycled asphalt more sensitive to ultraviolet light, which affects the durability of asphalt. Therefore, this paper studies the performance of asphalt before and after UV aging from micro and macro aspects. Firstly, through four-component analysis and FTIR and other experiments, the micro changes of waste vegetable oil recycled asphalt after UV aging were revealed, and the UV aging mechanism of waste vegetable oil recycled asphalt was clarified. At the same time, the mineral oil recycled asphalt and SK-70 asphalt are introduced. The physical properties, rheological properties and road performance of the three kinds of asphalt were compared with ultraviolet aging time through DSR and BBR tests. The influence of ultraviolet aging on SK-70 asphalt and two kinds of recycled asphalt was clarified from the perspective of macro performance. The results show that compared with the other two kinds of asphalt, the dispersion of light components in waste vegetable oil recycled asphalt is more serious after UV aging, and the changes of components and functional groups are the most obvious. The change of functional groups is three times of SK-70 asphalt, and the UV aging resistance is poor. After UV aging, the indexes of three kinds of asphalt in evaluating high, medium and low temperature performance are consistent, which indicates that the changes of three kinds of asphalt after aging are consis-tent: the high temperature performance is improved, while the low and medium temperature performance is decreased, and the most obvious performance change is recycled asphalt from waste vegetable oil.
Key words:  anti-ultraviolet aging    waste vegetable oil    microscopic changes    rheological properties
                    发布日期:  2021-07-16
ZTFLH:  U414  
基金资助: 国家自然科学基金(51778037;51308030)
通讯作者:  suozhi@bucea.edu.cn   
作者简介:  索智,北京建筑大学副教授,硕士研究生导师。2010年香港理工大学(中国)土木与交通工程学院博士毕业后前往北京建筑大学任教至今。在国内外学术期刊上发表论文20余篇,申请国家发明专利15项,其中授权9项。其团队主要研究方向包括:功能性路面材料;低碳环保路用材料研发;预防性养护管理、耦合结构分析。负责完成科研项目20余项。获部级科技进步奖一等奖两项,科技进步二等奖一项、三等奖两项,北京市科技进步一等奖一项。
引用本文:    
索智, 陈欢, 张奥, 聂磊. 废植物油再生沥青紫外老化机理及路用性能[J]. 材料导报, 2021, 35(Z1): 662-668.
SUO Zhi, CHEN Huan, ZHANG Ao, NIE Lei. UV Aging Mechanism and Road Performance of Waste Vegetable Oil Recycled Asphalt. Materials Reports, 2021, 35(Z1): 662-668.
链接本文:  
http://www.mater-rep.com/CN/  或          http://www.mater-rep.com/CN/Y2021/V35/IZ1/662
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