摘要
为探究生物油改性效果及改善生物沥青的性能表现,采用生物油和有机化蒙脱土为原料,分别制备生物沥青和有机化蒙脱土改性生物沥青,利用流变性能试验、布氏黏度试验和多应力蠕变性能试验,揭示生物油和有机化蒙脱土对沥青的改性机理。研究结果表明:生物油与石油沥青具有良好的相容性,生物油改性后生物沥青的高温抗永久变形能力和低温抗裂性能较好,黏度稍有提高;有机化蒙脱土可形成独特的片层结构吸收沥青组分,沥青中重组分含量增加,掺加有机化蒙脱土后,改性生物沥青高温抗永久变形能力进一步改善,黏度提升效果显著,达基质沥青的2倍以上,但低温性能受到影响。
In order to explore the modification effect of bio-oil and improve the performance of bio-asphalt,bio-asphalt and organic montmorillonite modified bio-asphalt were prepared respectively with bio-oil and organic montmorillonite as raw materials.The rheological property test,the Brookfield viscosity test and multi stress creep performance test were used to reveal the modification mechanism of bio-oil and organic montmorillonite on asphalt.The results show that the bio-oil has good compatibility with petroleum asphalt,and the high temperature and low temperature cracking resistance of bio-oil modified bio-asphalt are better,and the viscosity is slightly improved.The organic montmorillonite can form a unique lamellar structure to absorb the asphalt components,and the content of heavy components in asphalt is increased.After the organic montmorillonite is added,the high temperature resistance to permanent deformation of modified bio-asphalt is further improved,and the viscosity improvement effect is significant.The result is more than twice of the base asphalt,but the low temperature performance is affected.
作者
冯学茂
张宇豪
韦慧
戴吟晗
杨鑫炎
FENG Xuemao;ZHANG Yuhao;WEI Hui;DAI Yinhan;YANG Xinyan(Guangxi Key Lab of Road Structure and Materials,Nanning 530007,China;Guangxi Xinfazhan Communication Group Co.,Ltd.,Nanning 530029,China;School of Civil Engineering,Central South University,Changsha 410075,China;School of Traffic and Transportation Engineering,Changsha University of Science and Technology,Changsha 410114,China)
出处
《铁道科学与工程学报》
CAS
CSCD
北大核心
2021年第3期687-694,共8页
Journal of Railway Science and Engineering
基金
广西道路结构与材料重点实验室开放基金资助项目
国家自然科学基金资助项目(51708048)
2019年长沙理工大学研究生科研创新项目(CX2019SS05)
2019年长沙理工大学大学生创新创业训练计划项目。
关键词
道路工程
流变性能
改性生物沥青
有机化蒙脱土
黏度
蠕变恢复率
road engineering
rheological properties
modified bio-asphalt
organic montmorillonite
viscosity
creep recovery
