Analysis of microscopic pore structures of rocks before and after water absorption

Hydrophilic characteristics of rocks are affected by their microscopic pore structures,which clearly change after water absorption.Water absorption tests and scanning electron microscopic（SEM） experiments on rock samples,located at a site in Tibet,China,were carried out Changes of rock pore structures before and after water absorption were studied with the distribution of pore sizes and fractal characteristics of pores.The results show that surface porosities,fractal dimensions of pores and the complexity of pore structures increased because the number of new small pores produced increased or the original macropore flow channels were expanded after rocks absorbed water.There were points of inflection on their water absorption curves.After water absorption of other rocks,surface porosities and fractal dimensions of pores and complexity of pore structures decreased as the original pore flow channels became filled.Water absorption curves did not change.Surface porosity and the pore fractal dimensions of rocks have good linear relationships before and after water absorption.

岩石的吸水的特征被他们的显微镜的毛孔结构影响，它清楚地在水吸收以后变化。水吸收测试和扫描电子显微镜(SEM ) 在岩石上试验样品，在西藏在一个地点定位了，中国，被执行。在水吸收前后的岩石毛孔结构的变化与毛孔尺寸的分发和毛孔的分数维的特征被学习。因为新小毛孔的数字生产了，表面孔，毛孔的分数维的尺寸和毛孔结构的复杂性增加了的结果表演增加了或在岩石吸收了水以后，原来的 macropore 流动隧道被扩展。有他们的水吸收曲线上的变化的点。在另外的岩石的水吸收以后，当原来的毛孔流动隧道变得充满，表面孔和毛孔的分数维的尺寸和毛孔结构的复杂性减少了。水吸收曲线没变化。表面孔和岩石的毛孔分数维图形尺寸在水吸收前后有好线性关系。