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.
