Team Looks to Turn CO2 Into Pre-Fab Concrete
Lori Lovely, writing for CEG, reports on the push to reduce global carbon emissions and the role that CarbonBuilt will play in introducing new, cleaner concrete.
"The power sector and heavy industry, more generally speaking, are under pressure to reduce emissions," he said.
The production of Ordinary Portland Cement, the binding agent used in concrete, is a substantial producer of carbon dioxide emissions: 0.9 tons of CO2 per ton of OPC, resulting from the combustion of fuel to heat cement kilns and the calcination of limestone (which accounts for 65 percent of the CO2 emissions from OPC production). It is concrete's most CO2-intensive component. Globally, OPC production makes up 9 percent of all CO2 emissions.
Sant explained that in spite of improvements to the process of OPC production, it is not possible to abate emissions from limestone decomposition. Therefore, it's essential to change the composition and the methods of production of cement.
"Modern construction is looking at materials and how they're produced," Sant said. The industry is seeing a large carbon footprint because, Sant believes, "there has been no innovation for 200 years."
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