Cement News tagged under: carbon-free cement

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Brimstone carbon-negative cement meets ASTM standard

18 July 2023, Published under Cement News

US-based climate technology company Brimstone has gained third-party certification of its carbon-negative cement, which the company says marks the first carbon-neutral or carbon-negative cement to meet one of the most commonly-used standards in the construction industry - ASTM C150.  Instead of baking limestone, Brimstone has developed an alternative method for producing cement, starting with carbon-free silicate rock. Chemically extracting calcium oxide from silicate does not release C...