Queens Carbon, a next-generation cement technology company, has secured $10 million in seed funding to scale its energy-efficient platform for producing cement and supplementary cementitious materials (SCMs). The round was led by Clean Energy Ventures, with participation from Plug and Play, Clean Energy Venture Group, and strategic investor and development partner Buzzi Unicem USA, a subsidiary of Buzzi S.p.A.

The funding will support team expansion, the construction of a 2,000 tons per year demonstration pilot facility at Buzzi Unicem USA’s Stockertown plant (Pennsylvania), and preparations for a full-scale commercial facility.

Queens Carbon’s breakthrough process is based on novel hydrothermal chemistry, using steam and pressure to drive the key chemical reactions at half the temperature of traditional cement production. The result is a low-energy, ASTM-compliant product and a new pathway for producing high-performance SCMs.

By leveraging industry-standard, abundantly available raw materials, Queens Carbon enables cement producers to deliver decarbonized product solutions without a green premium. The company’s flagship product is a carbon-neutral SCM that can replace up to 50% of conventional cement in concrete. Thanks to its modular manufacturing approach, the SCM can be produced directly at cement plants, allowing seamless integration with existing operations.

Luigi Buzzi, Chief Technology Officer at Buzzi, stated:
"Achieving net-zero carbon emissions by 2050 requires forward-thinking solutions. This collaboration with Queens Carbon combines breakthrough innovation with industrial application, helping us make tangible progress on our path to decarbonization."

This round brings Queens Carbon’s total funding to $30 million, including a $14.5 million ARPA-E grant awarded in 2024.

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