Zhou (2024) A Review of Biomass-Derived Biochar and Its Potential in Asphalt Pavement Engineering. Materials Science-Poland. 42(2). pp. 81-99.

BiocharBiochar is a carbon-rich material created from biomass decomposition in low-oxygen conditions. It has important applications in environmental remediation, soil improvement, agriculture, carbon sequestration, energy storage, and sustainable materials, promoting efficiency and reducing waste in various contexts while addressing climate change challenges. More has attracted significant attention for its environmental benefits and unique properties. A promising new application of biochar is its use in asphalt pavement engineering, which could offer sustainable alternatives to conventional asphalt materials. The rapid global urbanization is driving the need for more resilient and eco-friendly infrastructure, making biochar an exciting avenue of research.

This review highlights the potential of biochar as a modifier for asphalt binders, an additive in asphalt mixtures, and a filter material for stormwater treatment. Biochar’s porous structure and carbon-rich nature enhance the mechanical properties and durability of asphalt, particularly in increasing resistance to rutting, cracking, and aging. Additionally, biochar contributes to carbon sequestration, addressing both environmental and performance needs.

However, challenges remain, such as variability in biochar properties based on feedstocks and production methods, which can affect the consistency of performance in asphalt applications. Standardized methods for biochar production, characterization, and implementation are necessary to further its adoption in the industry. Furthermore, more long-term field studies are required to fully understand the durability and cost-effectiveness of biochar-modified asphalt pavements.

In summary, biochar shows great potential in making asphalt pavements more sustainable and high-performing. Continued research and development could help transition the road construction industry toward greener alternatives, benefiting both the environment and infrastructure longevity.