PE植物油复合改性沥青性能评价

打开文本图片集

Performance Evaluation of PE Vegetable Oil Composite Modified Asphalt

中图分类号：U414 文献标志码：A 文章编号：1005-8249（2025）01-0018-06

DOI：10.19860/j.cnki.issn1005- 8249.2025.01.004

DU Yong

( Zhengzhou City Highway Engineering Company， Zhengzhou 45OoOO， China）

Abstract：Inordertoexplorethefeasibilityoftheapplicationofpolyethylene（PE）andvegetableoilcompositemodifiedasphalt， theperformanceofPEvegetableoilcompositemodifiedasphalt wascomprehensivelyevaluatedbypenetration，ductility，softning point，Brinellrotationalviscosity，penetrationindex test，short-termageing testandThermogravimetricanalysisaalysistest. The results show that PE canreduce the penetration and ductility of the matrix asphalt，and improve the softening point and viscosity；Afteraddingvegetableoil，astheamountofvegetableoilincreases，tepenetrationandductilityofthecomposite modifiedasphaltgraduallyincrease，whilethesofteningpointandviscosityshowadecreasing trend.PEcanimprovethe temperature sensitivity of asphalt，but when the content of vegetable oil reaches 7% ，the PI value shows that its temperature sensitivityis worsethanthatofbaseasphalt.PEcanimprovethethermal oxygen ageingandthermaldecompositionpropertiesof asphalt，andanappropriate amount of vegetableoilcan further enhancetheoxygen agingresistanceof asphalt，withanoptimal dosage of 3% ．Astheamountof vegetableoil increases，the thermaldecomposition characteristicsof asphalt graduallydeteriorate.

Key words：asphalt；vegetable oil； polye thylene （PE）；physical indicator；ageing；thermogravimetry

0 引言

沥青作为石化工业的副产品，是一种黏弹性材料，目前已被广泛应用于道路建设中。（剩余13220字）