In the MIT technology review, “What Happened to green concrete?”, Majcher (2015) stated that the intention for producing concrete that absorbs carbon dioxide was to reduce the 5 percent of global carbon dioxide emissions which concrete accounted for. However; due to lack of support, the idea did not make progress, instead, the author introduced other technologies such as nanoengineering and fly-ash. The author mentioned that in 2010, Novacem, a green cement company, found a way to substitute Portland cement with magnesium oxide material that captures carbon dioxide when mixed with water. However, due to lack of support, it resulted in their eventual liquidation. The author also mentioned, “Storing carbon dioxide in cement is not the only way to improve the material’s environmental footprint.” For instance; MIT’s Concrete Sustainability Hub showed that concretes created from nanoengineering procedure were twice as resistant to breaking and allow lesser concrete used for building constructions. Another way was modifying the properties of concrete by mixing with fly-ash.
The author concluded that although green concrete was not successful, the takeaway was that cement factories and processes helped to enhance industry energy efficiency by 40% since the 1970s, helping in reducing global carbon dioxide emission.
Majcher, K. (2015, March 19). What Happened to Green Concrete?
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