Carbon-Storing Building Materials

Researchers at Northwestern University have developed carbon-storing building materials using seawater, electricity and carbon dioxide. The process applies a low electrical current to seawater, triggering chemical reactions that form solid minerals such as calcium carbonate and magnesium-based compounds. These materials can store significant amounts of CO₂ while being shaped into powders or aggregates for use in construction.

By adjusting the electrical input and CO₂ flow, the team can control the material’s structure and composition, enabling applications across concrete, cement and coatings. As a potential alternative to sand and gravel, the material also addresses growing concerns around resource extraction.

This approach signals a shift toward construction materials that integrate carbon capture directly into production. It may influence how building supply chains reduce emissions while creating new opportunities for scalable, lower-impact infrastructure solutions.

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