Carbonation curing of cement mortars incorporating carbonated fly ash for performance improvement and CO2 sequestration

• Carbonation treatment reduces free CaO and capture CO 2 effectively. • “Double carbonation” mitigates strength loss caused by incorporation of HFA. • “Double carbonation” delays the strength development brought by pozzolanic effect. Carbonation treatment of fly ash (FA) is proposed as a promising method for stabilization of hazardous residues and CO 2 sequestration. This paper aims to investigate the performance of cement mortar incorporating...