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Pavements 2025

Asphalt Binder and Mixture Characterization

POSTER RECEPTION (View list of posters here)

Fatigue Life of Polyethylene-Modified Asphalt Binder with Waste Cooking Oil at varying Temperatures

Tuesday, June 10, 2025
4:45 PM – 6:00 PM MT
Abstract: Incorporating waste plastic in the pavement as an asphalt binder modifier is crucial for sustainable and environmentally friendly roads. A critical factor in ensuring sustainability and pavement longer service life is the fatigue life of modified asphalt binder. This study investigates the effect of recycled plastic and waste cooking oil (WCO) on the fatigue life of asphalt binders modified under varying average temperatures. The Linear Amplitude Sweep (LAS) test was performed on modified asphalt binders to assess the fatigue life. PG58-28 was modified with Light-Density Polyethylene (LDPE) recycled from a marina boat and shrink-wraps. The shredded LDPE was added to the binder in proportions of 2%, 4%, 5%, and 6% by weight. The WCO was added in the percentages of 1%, 2%, and 3%. The fatigue life of modified asphalt binders was assessed at an average temperature of 19o C and at 15o C and 23o C to simulate its performance in areas with lower and higher average temperatures, respectively. An Atomic Force Microscopy (AFM) will be used to analyze the morphology of the modified asphalt binder. Thermogravimetric analysis (TGA) will be used to measure the thermal stability of asphalt modified with plastic. Adding LDPE and WCO presented promising results by significantly improving the fatigue life of unmodified asphalt binder. The fatigue resistance of the binder doesn’t decrease with higher testing temperatures. The study highlights that the modification of asphalt binder with recycled material provides an eco-friendly solution with improved durability.

Learning Objectives:

Attendees can expect to learn the following from this session:
  • determine the impact of Light Density Polyethylene and Waste cooking oil on the fatigue resistance of PG 58-28 binders under different temperatures and their optimum dosages.
  • analyze the morphology of modified asphalt binder using Atomic Force Microscopy (AFM) and thermal stability with the help of Thermogravimetric analysis (TGA).
  • illustrates the correlation between material integrity (C) and fatigue damage intensity (S) of polyethylene-modified asphalt binder with WCO.