Enhanced Performance of Reclaimed Concrete Slurry Waste in Cement Paste: Effect of Early-age Carbonation Curing

Since early-age carbonation curing can effectively sequester CO2 while improving the properties of cementitious materials, it can be applied to solve the pore early age performance issue of cement substituted with recycled concrete slurry waste (RCSW). This paper, is therefore, aimed to investigate the feasibility of early-age carbonation curing in the cement paste replaced with different treated RCSW under different replacement ratios by testing its mechanical properties and calculating its environmental impact. The results indicated that the early compressive strength of the paste significantly improved by early-age carbonation curing. The addition of RCSW promoted the carbonation reaction in the cement paste, displaying a higher carbon sequestration capability which has been confirmed by the calculation from environmental impact.