CO2 absorption of concrete
Re-evaluation of life cycle assessments for concrete products?
Carbonation is the physical and chemical reaction between CO2 and hardened cement paste in the presence of pore water, and in this process carbon from the atmosphere is sequestered. The authors of an article [1] published in „Nature Geoscience“ in November 2016 estimate that from 1930 to 2013 worldwide 43 % of the CO2 process emissions from the production of cement had been sequestered in carbonating of concrete and mortar in the same period.
Hence, the perspective taken in the article evaluates a global CO2 balance for a period completed in the past. But an assessment of the question, which...
