In Northern Germany, a new approach to road construction is showing how infrastructure can play a role in climate mitigation. Novocarbo GmbH, a leader in carbon removal technologies, has partnered with Hansa Asphalt GmbH to pilot a novel asphalt mix that integrates biochar—a carbon-rich byproduct from plant waste.

The project, conducted at the Carbon Removal Park Baltic Sea in Mecklenburg-Western Pomerania, introduced fine-grained 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 (<5 mm) into the top asphalt layer at a 3% ratio. This resulted in roughly 7 metric tons of biochar incorporated into the test site. Early findings highlight three key benefits: increased material efficiency, potential substitution of raw materials like fillers or bitumen, and long-term carbon storage.

Caspar von Ziegner, CEO of Novocarbo, notes that this approach could change how infrastructure contributes to climate goals: “Biochar can not only ease the burden on the climate but also deliver functional advantages.”

In terms of performance, preliminary lab tests and field analysis suggest that biochar-enriched asphalt may offer enhanced durability, greater resistance to temperature shifts, and improved load stability. In suitable formulations, biochar also appears to increase asphalt binder viscosity, supporting long-term structural integrity.

The climate impact is measurable: approximately 75 kg of CO₂ equivalent is stored per ton of asphalt, totaling 17.5 tons at the test site. These carbon removals are certified by Novocarbo and verified independently, generating tradable Carbon Removal Credits.

Looking ahead, a commercial rollout is planned for fall 2025. Novocarbo is also expanding partnerships with construction firms and research institutions to further test and scale the technology. With the global asphalt market projected to exceed $370 billion by 2032 and growing demand for low-emission infrastructure, biochar-infused asphalt may offer a scalable solution—provided environmental standards, such as limits on polycyclic aromatic hydrocarbons (PAHs), are maintained.