High-pressure carbonation of mortar as a model for recycled concrete aggregates

This research proposes a novel deep breathing analogy (DBA) accelerated carbonation process. Inspired by the breathing mechanism of human lungs, the DBA method involves injecting pure CO 2 into a reaction chamber at a specific pressure (inspiration) and subsequently evacuating the gas from the chamber to a negative pressure (exhalation). This process is repeated to remove excess water from the chamber and restore optimal carbonation conditions, which further enhances the efficiency of carbonation for the sample. The effectiveness of this method is evaluated based on weight gain, proportion of captured CO 2 and carbonation depth. Results show that the DBA method significantly reduces the inhibition of carbonation. Based on the test results, a correlation between the proportion of captured CO 2 and carbonation depth is established. Additionally, a more accurate prediction model for pressurized carbonation is proposed and the economic potential of concrete carbonation is studied. Supplementary Information The online version contains supplementary material available at 10.1038/s41598-024-74764-z.

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High-pressure carbonation of mortar as a model for recycled concrete aggregates

Cited by 4 publications

References 46 publications

Quantitative characterization of recycled cementitious materials before and after carbonation curing: Carbonation kinetics, phase assemblage, and microstructure

Quantitative characterization of recycled cementitious materials before and after carbonation curing: Carbonation kinetics, phase assemblage, and microstructure

Efficacy of various accelerated carbonation techniques to improve recycled concrete aggregates: A comprehensive review

Novel accelerated carbonation methods based on deep breathing analogous and prediction model for pressurized carbonation of concrete

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