碳化对碱矿渣水泥石孔结构的影响

以水玻璃(WG)和氢氧化钠(NH)为碱组分配制碱矿渣水泥石（AASS），采用氮吸附方法分析了这两种碱矿渣水泥石碳化前后的孔结构，并与硅酸盐水泥石（PC）作对比.结果表明：碳化前，以水玻璃为碱组分的矿渣水泥石比表面积最大，平均孔径最小，累积孔体积最大，最可几孔径最小；以氢氧化钠为碱组分的碱矿渣水泥石比表面积最小，平均孔径最大，累积孔体积最小，最可几孔径最大；而硅酸盐水泥石的比表面积、平均孔径、累积孔体积及最可几孔径均介于上述两者之间.碳化后，上述3种水泥石平均孔径、最可几孔径均减小；碱矿渣水泥石比表面积增大，硅酸盐水泥石比表面积减小.

Influence of Carbonation on Pore Structure of Alkali ActivatedSlag Cement Stone

Water glass(WG) and sodium hydroxide(NH) were selected as alkali activator to prepare alkali activated slag cement stone(AASS), and nitrogen adsorption method was adopted to examine the pore structure of cement stone before and after carbonation. The results show that before carbonation, the specific surface area and cumulative pore volume of AASS activated by water glass are the biggest, and the average pore diameter and the most probable pore diameter of that are the smallest. While in the AASS activated with NaOH, the situation is opposite. Those parameters of Portland cement stone is found between the two. Carbonation reduces the average pore diameter and the most probable pore diameter of all cement stone. However, after carbonation, the specific surface area of AASS increases, and that of Portland cement stone decreases.