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The feasibility of developing a high strength KOBM (Klockner Oxygen Blown Maxhutte) steel slag binder activated by carbonation as an alternative cementing material was investigated. After two-hour carbonation reaction, steel slag compacts displayed a 2h compressive strength of 80MPa with a CO2 uptake of 13%. Early strength gain was attributed to the carbonation of the slag’s γ-C2S component. Subsequent...