2023 SFP 1-2 COMPLETED
Release time: 2024/07/23 Publisher： original Views：
Effects of recycled plastics on the performance of asphalt mixture
Principal Investigator： |
Hou Shuguang
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Project Background:
The overall recovery rate of waste plastics in China is less than 30%. Using waste plastics in asphalt mixtures is an exploratory way to dispose of waste plastics. More than 15 million tons of recycled thermoplastics will be used in the process of paving or road maintenance every year, which is the inevitable course for the reduction of plastic pollution, petroleum consumption, and promotion for the transformation of petrochemical industry to reduce carbon dioxide emission.
Aims & Goals:
1. To build up a large-scale step-adding technology for the preparation of high-content recycled thermoplastic-modified asphalt and asphalt mixture;
2. To improve the directional gradation design of recycled thermosetting plastics in asphalt mixtures and find out their performance evaluation indexes;
3. To propose the functional oriented stratification design of the paving structure for high-content recycled plastic modified asphalt mixture, as well as the pavement construction technology, and technical guidelines for pavement quality control.
Outcomes:
STANDARD 1: Group standard - 'Technical specification for application of recycled plastic fillers for asphalt mixtures' ( draft for Review)
PATENT 1: A type of miscible storage device for waste plastic modified asphalt (granted)
PATENT 2: A device for preparing waste plastic modified asphalt (granted)
PAPER 1: 'Microscopic properties of asphalt and polyethylene at an extraordinary high dosage through molecular dynamics simulation', Buildings, 2024, 14: 164
PAPER 2: 'Preparation and properties of high-viscosity and high-elasticity road asphalt by modification of recycled low-density polyethylene plastic with large content', Modern Chemical Research, 2025, 2-3.
DEMONSTRATION：'A total of 2.0 km of demonstration projects were completed, consisting of: 0.75 km of recycled thermoplastic plastic asphalt pavement, 0.75 km of recycled thermosetting plastic asphalt pavement, and 0.5 km of a combination of recycled thermoplastic plastic asphalt pavement and recycled thermosetting plastic asphalt pavement'.