k2SiO3溶液对黏性土孔隙分形特性的影响分析

敦煌研究所研制的k2SiO3对干旱环境下土遗址防风化加固效果显著。设计了不加k2SiO3材料、加5 % 浓度k2SiO3溶液饱和后自然风干1次和3次人工重塑黏土试样的SEM观测，目的是研究k2SiO3对黏土孔隙结构的影响。基于此，利用分区统计方法和计算机图像处理技术，研究了k2SiO3对黏土孔隙结构的改变。分析表明，经k2SiO3加固后的黏土颗粒间胶结联结加强，结构稳定性提高。最后利用Sandbox法计算了土孔隙的分维数，定量分析了k2SiO3对土孔隙的改变，分析发现加3次溶液土样孔隙分维数最小，加固效果最佳。而且土孔隙分维数不受图象灰度分割阈值和SEM放大系数的影响。

Analysis of fractal characteristics of ruins clay affected by k_2SiO_3 solution under SEM test condition

k2SiO3 developed by Conservation Institute of Dunhuang Academy,is used for the protection of the earthen architecture sites under arid weathering condition,of which protective effect is good.The SEM tests of artificial remoulded clay sampled from ruin region without k2SiO3 material,with 5 % concentration saturating and natural air drying once or three times are designed to study the change of clay porous feature affected by k2SiO3 material.Based on images of SEM test,the pore structure of clay changed by th...