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A platform for research: civil engineering, architecture and urbanism
Modified asphalt based on polyethylene with broad molecular weight distribution
Graphical abstract Display Omitted
Highlights Wide molecular weight distribution polyethylene with double bonds was prepared. VPE0 reduce mixing and compaction temperature and improve service performance. The viscosity reduction mechanism of VPE0 is explained. VPE1, VPE2 and VPE3 can be adjusted to meet different road performance requirements.
Abstract The incorporation of polyethylene has been shown to improve the rheological properties of asphalt pavement, but other problems are often encountered, such as dispersion, and PE modified asphalt increases the mixing and compaction temperature, resulting in high energy consumption and pollution. In this study, A kind of polyethylene composed of three components was prepared. The performance of asphalt modified by polyethylene (VPE0) of high polydispersity index (PDI) was studied. The asphalt modified by VPE0 had lower penetration and ductility, and higher softening point than that of matrix asphalt. The VPE0 reduced the viscosity of asphalt during construction stage and enhanced simultaneously the viscosity in the serve stage. The colloidal theory is used to explain the viscosity reduction mechanism of end-group double bond polyethylene. The rheological properties were improved after adding polyethylene (VPE0). A homogeneous dispersion of the VPE0 in the asphalt was observed by fluorescence microscopy. The ratios of the three components in the polyethylene were varied to study their effects on the rheological properties. VPE3 improved significantly the anti-rutting ability and elastic modulus of asphalt. The results show that the ratio between the three components can be adjusted for different pavement requirements.
Modified asphalt based on polyethylene with broad molecular weight distribution
Graphical abstract Display Omitted
Highlights Wide molecular weight distribution polyethylene with double bonds was prepared. VPE0 reduce mixing and compaction temperature and improve service performance. The viscosity reduction mechanism of VPE0 is explained. VPE1, VPE2 and VPE3 can be adjusted to meet different road performance requirements.
Abstract The incorporation of polyethylene has been shown to improve the rheological properties of asphalt pavement, but other problems are often encountered, such as dispersion, and PE modified asphalt increases the mixing and compaction temperature, resulting in high energy consumption and pollution. In this study, A kind of polyethylene composed of three components was prepared. The performance of asphalt modified by polyethylene (VPE0) of high polydispersity index (PDI) was studied. The asphalt modified by VPE0 had lower penetration and ductility, and higher softening point than that of matrix asphalt. The VPE0 reduced the viscosity of asphalt during construction stage and enhanced simultaneously the viscosity in the serve stage. The colloidal theory is used to explain the viscosity reduction mechanism of end-group double bond polyethylene. The rheological properties were improved after adding polyethylene (VPE0). A homogeneous dispersion of the VPE0 in the asphalt was observed by fluorescence microscopy. The ratios of the three components in the polyethylene were varied to study their effects on the rheological properties. VPE3 improved significantly the anti-rutting ability and elastic modulus of asphalt. The results show that the ratio between the three components can be adjusted for different pavement requirements.
Modified asphalt based on polyethylene with broad molecular weight distribution
Yan, Luke (author) / Li, Mengru (author) / Li, Qian (author) / Li, Huayi (author)
2020-05-21
Article (Journal)
Electronic Resource
English
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