Phase and morphology evolution of CaCO 3 precipitated during carbonation of lime pastes via the reaction Ca(OH) 2 ? CO 2 ? CaCO 3 ? H 2 O has been investigated under different conditions (pCO 2 & 10 -3.5 atm at 60 % RH and 93 % RH; pCO 2 = 1 atm at 93 % RH) using XRD, FTIR, TGA, and SEM. Simulations of the pore solution chemistry for different stages and conditions of carbonation were performed using the PHREEQC code to investigate the evolution of the chemistry of the system.
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