An overview of utilizing CO2 for accelerated carbonation treatment in the concrete industry

Accelerated carbonation treatment as an effective approach of reducing the carbon footprint in the concrete industry is being investigated extensively. Such carbonation treatment converts gaseous CO2 into carbonate minerals (or mineral CO2 sequestration). The present review provided a state-of-the-art summary on the relevant carbonation strategies that have been investigated, with a special focus on identifying the remaining industrial challenges and critical research gaps that need further investigation. Key parameters affecting pre-carbonation treatments of recycled concrete aggregates, fly ash, and slag were examined systematically, including chemical compositions and particle sizes of the materials,…

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