CO2 sequestration of fresh concrete slurry waste: Optimization of CO2 uptake and feasible use as a potential cement binder

Too high moisture content prevents CO2 from penetrating into the inner part of samples, compromising CO2 diffusion and overall carbonation effect.

“It is believed that too high moisture content prevents CO 2 from penetrating into the inner part of samples [31,87,91,94,95], therefore compromising CO 2 diffusion and overall carbonation effect.”

The CO2 uptake capacity of grained concrete slurry waste measured by accelerated aqueous carbonation was 20.4%.

“By the accelerated aqueous carbonation in [95], the CO 2 uptake capacity of grained concrete slurry waste was measured at 20.4%”

Using carbonated concrete slurry waste instead of untreated concrete slurry waste could improve the compressive strength of mortars at 7 and 28 days.

“It was found that using carbonated concrete slurry waste instead of untreated concrete slurry waste could improve the compressive strength of mortars at 7 and 28 days [95].”

Using untreated concrete slurry waste, waste gypsum, and cement kiln dust as partial replacement of cement tends to dramatically reduce the strength and durability of cement-based composites.

“However, using these waste materials as partial replacement of cement tends to dramatically reduce the strength and durability of cement-based composites [95,154,188].”