Carbon dioxide composes 82% of all greenhouse gases, a gas that is emitted during cement production. Cement production alone accounts for 7% of the world’s greenhouse gas emissions.
Scientists at the University of California Los Angeles are researching ways to reduce greenhouse emissions. Scientist Gaurav Sant of the California NanoSystems Institute at UCLA completed research on this very issue.
Sant found that carbon dioxide released during production could be captured and reused. This can be done, as Sant and his team found out, by finding ways that the carbon dioxide “given off during calcination can be captured and recombined with calcium hydroxide to recreate limestone — creating a cycle in which no carbon dioxide is released into the air… the method is analogous to how limestone cementation occurs in nature, where limestone forms the tough exoskeletons of coral, mollusks and seashells, and when microbes form limestone that cements grains of sand together."
While scientists have looked into this method before, Sant says that this method has never been demonstrated with the purpose of creating a carbon dioxide-neutral cement production system.
To learn more about ways that this technique can impact the industry and help the environment, click here.