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Climate Change

Japan's Taisei to make concrete with alternative method to cut CO2

General contractor to create cement with calcium carbonate, capturing gas

Japanese general contractor Taisei has developed a calcium carbonate cement that captures rather than emits carbon dioxide in the process of making concrete. (Source photo by Kaisuke Ota)

TOKYO -- Japanese general contractor Taisei has developed a technology to lock up carbon dioxide from the air in the process of making concrete, significantly reducing emissions of the greenhouse gas, Nikkei has learned.

The new technology captures atmospheric carbon dioxide to produce calcium carbonate, a compound of carbon dioxide and calcium, for cement, a major component. Concrete production usually generates up to 300 kg of carbon dioxide per cubic meter of concrete, with the production of ordinary cement accounting for about 90% of the emissions generated in the whole process.

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