Algae-Based Asphalt for Cleaner Roads

Date:April 2, 2024

Application

• This algae-based asphalt can be used in road construction and infrastructure development, offering a sustainable alternative to traditional asphalt. It helps reduce toxic emissions and improves urban air quality.

Description

This project explores the use of biobased materials, particularly algae, to create more sustainable and less toxic asphalt binders. Researchers from Arizona State University have developed a binder using liquefied algae that reduces pollutant emissions by up to 70%, addressing both air quality and climate change concerns. The project also investigates using algae from wastewater filtration and biochar to further reduce asphalt's environmental impact.

 

 

Pathway Description:

The process used in this project involves the development of biobased asphalt binders. Specifically, the researchers replace traditional petroleum-based bitumen with liquefied algae, which is mixed with the gravel aggregate in the asphalt. The liquefied algae binder helps capture and trap volatile organic compounds (VOCs) before they can be released into the air during the heating and application of asphalt.