Weather aging effects on modified asphalt with rubber-polyethylene composites

Yuetan Ma, Shifeng Wang, Miaomiao Zhang, Xi Jiang, Pawel Polaczyk, Baoshan Huang

Research output: Journal article publicationJournal articleAcademic researchpeer-review

27 Citations (Scopus)

Abstract

Weather aging may cause more severe degradation on asphalt than thermal-oxidative aging due to the synergistic effect among oxygen, heat, ultraviolet (UV) radiation, and moisture. This study aimed to investigate weather aging effects and anti-aging mechanisms on asphalt modified with rubber-polyethylene (PE) composites. The modified binder blends and asphalt mixtures were subjected to outdoor weather aging. Dynamic shear rheometer (DSR), Fourier transform infrared spectroscopy (FTIR), Gel permeation chromatography (GPC), and optical microscopy tests were adopted to characterize the rheological properties, aging resistance, polymer degradation, and anti-aging mechanisms of modified binder blends, respectively. Mixture performance tests including Asphalt Pavement Analyzer (APA) and Ideal-CT tests were used to evaluate rutting and cracking resistance of asphalt mixtures. Results showed that weather aging can cause more severe aging to asphalt binders than pressure aging vessel (PAV) due to the severe degradation of PE particles. Rubber-PE composites alloyed with an extruder proved to stabilize PE particles in asphalt and significantly improve the aging resistance of modified binder blends. The enhanced aging resistance is attributed to the dispersion of PE particles and carbon black released by soluble rubbers.

Original languageEnglish
Article number161089
JournalScience of the Total Environment
Volume865
DOIs
Publication statusPublished - 20 Mar 2023
Externally publishedYes

Keywords

  • Aging resistance
  • Cracking resistance
  • Modified binder blends
  • Rubber-PE composites
  • Weather aging

ASJC Scopus subject areas

  • Environmental Engineering
  • Environmental Chemistry
  • Waste Management and Disposal
  • Pollution

Fingerprint

Dive into the research topics of 'Weather aging effects on modified asphalt with rubber-polyethylene composites'. Together they form a unique fingerprint.

Cite this