Recycling waste plastics in roads: A life-cycle assessment study using primary data

Area of Science:

• Environmental Science
• Materials Science
• Civil Engineering

Background:

• Waste plastics pose significant environmental challenges.
• Sustainable construction materials are in high demand.
• Recycled materials offer potential for resource conservation.

Purpose of the Study:

• To evaluate the environmental impact of using recycled plastic in asphalt mixes.
• To compare the life cycle assessment (LCA) of recycled plastic asphalt with conventional asphalt.
• To assess the viability of waste plastic conversion into asphalt components.

Main Methods:

• Life Cycle Assessment (LCA) methodology.
• Data collection from Victorian recycling facilities, Australia.
• Comparative analysis of wet and dry methods for plastic recycling in asphalt.

Main Results:

• Recycled plastic as a polymer additive (wet method) shows environmental advantages.
• Recycled plastic as a synthetic aggregate (dry method) also presents environmental benefits.
• The use of recycled plastic in asphalt mixes is potentially more environmentally favorable than virgin materials.

Conclusions:

• Recycling waste plastics into asphalt components is an environmentally promising approach.
• The study supports the use of recycled plastic in road construction for sustainability.
• Further research can optimize processes for maximizing environmental gains.