360 specimens (6.54 kg CO₂/ton). These results demonstrate that CO₂ was effectively fixed within the solidified slurry. Furthermore, the significantly enhanced mechanical strength and CO₂ fixation observed in the field cores suggest that the solidification reaction such as hydration and carbonation reactions were promoted under pressurized in situ conditions. This finding confirms the effectiveness of CO₂ fixation in the goaf environment. Figure 6 – Cored samples of the solidified slurry Figure 7 – Results of TG-DTG analysis
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