Study on Effect of Carbonation Curing for Cement Minerals and Clinker

摘要

As an advanced technology, carbonation reaction could dispose of industrial solid residues and sequestrate CO_2 gas, save resources and protect environment. In this study, Major minerals of cement were high-temperature burned using pure chemical reagents ( the burning temperature of C_3S, C_2S, C_3A, C_4AF were 1550°C,1400°C,1330°C, 1350°C). Forming and unforming main cement minerals and clinker were carbonated under the condition of CO_2 partial pressure P=0.2MPa, T=25°C, CO_2 gas concentration c>99.9% and water/soild w/s=0.12kg/kg. The change of minerals and the effect of carbonation were tested. The experimental results showed that carbonation reaction could been occured in four cement minerals (C_3S, C_2S, C_3A and C4AF), and CaCO_3 crystals appeared in these minerals.