采用X射线衍射、热重分析、核磁共振和压汞法，研究了饱和度对以水玻璃为激发剂的碱矿渣砂浆（ASm）抗碳化性能的影响.结果表明，随着饱和度的降低，水化硅（铝）酸钙（C-（A）-S-H）凝胶脱钙更严重，ASm总孔隙率增大，最可几孔径增加，碳化生成的亚稳态文石和球霰石增多，ASm抗碳化性能变差，抗压强度保留率降幅和碳化深度增幅降低.

The influence of saturation degree on the carbonation resistance of alkali-activated slag mortar（ASm） with water glass as activator was studied by X-ray diffraction， thermogravimetric analysis， nuclear magnetic resonance， and mercury intrusion porosimetry. The results show that with the decreases of saturation degree， the decalcification of calcium alumino silicate hydrate（C-（A）-S-H） gel becomes more severe， the total porosity and the most probable pore size of ASm increase. The unstable aragonite and vaterite generated by carbonation increase with the decreases of the saturation degree， resulting in the deterioration of the carbonation resistance of ASm. With the decreases of saturation degree， the reduction in compressive strength retention rate and the increase in carbonation depth of ASm are decreased.

TU526

国家自然科学基金资助项目（52278248）