The pore structure of alkali-activated fly ash mortar (AAFAM) under different mix ratios and curing system was measured by mercury intrusion porosimetry (MIP) and scanning electron microscopy (SEM). Based on the fractal theory, the integral shape dimension of the pore surface of the AAFAM is obtained and discussed its relationship with total porosity, proportion of gel pores, transition pore, capillary pores and macropores, average pore diameter, median pore diameter, pore surface area, pore size distribution, and the influence of mass ratio of alkali activators, curing temperature, and curing age on pore structures. In addition, data regression analysis (DRA) is a statistical tool and applied to study the relationship between microscopic pore parameters and the fractal dimension of the AAFAM mixtures. The results show that the fractal dimension of the AAFAM is between 2.6 and 2.9, and the pore size distribution has a linear relationship with the fractal dimension, and the internal pore diameter of the AAFAM will gradually decrease and AAFAM’s matrix gradually becomes denser and the microstructure integrity is more stable as the curing age and temperature increases, and the mechanical strength will be higher. The AAFAM mixture composed of Na₂SiO₃/NAOH with a mass ratio of 1.0 and 100% fly ash is considered the most suitable mixture. AAFAM can make full use of industrial by-products (fly ash) and seems to be a suitable candidate for green environmental protection materials for engineering applications.

通过压汞法（MIP）和扫描电子显微镜（SEM）测量了碱配合粉煤灰砂浆（AAFAM）在不同配合比和固化体系下的孔结构。基于分形理论，获得了AAFAM孔表面的整体形状尺寸，并讨论了其与总孔隙率，凝胶孔比例，过渡孔，毛细管孔和大孔，平均孔径，中值孔径，孔表面的关系。面积，孔径分布以及碱活化剂的质量比，固化温度和固化年龄对孔结构的影响。此外，数据回归分析（DRA）是一种统计工具，用于研究微观孔参数与AAFAM混合物的分形维数之间的关系。结果表明，AAFAM的分形维数在2.6〜2.9之间，孔径分布与分形维数呈线性关系，AAFAM的内孔径逐渐减小，AAFAM的基体逐渐致密，微观结构逐渐增强。随着固化年龄和温度的升高，完整性会更加稳定，并且机械强度也会更高。由钠组成的AAFAM混合物质量比为1.0和100％粉煤灰的₂ SiO ₃ / NAOH被认为是最合适的混合物。AAFAM可以充分利用工业副产品（粉煤灰），并且似乎是工程应用中绿色环保材料的合适候选者。