Verde Resources, a US-based company that pivoted from mining to sustainable building materials around 2021, is now producing a cold-recycled bio-asphalt surface mix using 100% recycled asphalt pavement (RAP), biochar, and a proprietary emulsifier. The story raises useful questions about permanence, carbon accounting, and what “sustainable asphalt” actually means in practice.

5 Key Takeaways

1. Permanence is the real claim. Verde’s carbon argument is not about avoidance but removal. Under the Pure Earth methodology, biochar embedded in asphalt sequesters carbon for 200 years. As long as the pavement is not incinerated, the carbon remains stable through milling and reuse cycles.

2. Biochar improves technical performance. The material acts as a sponge within the asphalt matrix, extending pavement lifespan and demonstrating freeze-thaw durability at placement temperatures between 35 and 40°F. This positions biochar as a performance additive, not just a sustainability feature.

3. The carbon accounting is verifiable. Verde works with carbon registries to validate removal credits. In a proof-of-concept project, 5 tons of biochar yielded 8 tons of verified carbon removal credits after lifecycle adjustments. Revenue from those credits is shared with the biochar production partner.

4. Biochar here is a building material, not a fuel. The article makes the distinction clearly: biochar used in construction is optimized for adsorption and structural function, not combustion. That distinction matters for how we discuss carbon stability and end-of-life scenarios in built environments.

5. Mainstream adoption will depend on EPDs and operational flexibility. Verde is now developing Environmental Product Declarations for its full product line. For asphalt producers, the practical case rests on year-round production, reduced burner use, and wider placement windows, not just sustainability messaging.

Worth monitoring as the EPD process develops. Happy to hear from members working on biochar applications in construction materials.

Shared from Asphalt Contractor, April 2026