Abstract：The micro structure of cemented soils，which is made from different original soils as well as with various cement contents，is investigated by ESEM method. Then，the data of pore such as the diameter，shape index and orientation angle are quantitatively analyzed via image processing technology. Comparing these data got from the loaded samples and unloaded ones，the connection between the strength of cemented soil and bearing mechanism is explored. The results show that the performance of pore diameter and pore shape is different before and after loading. Under the lowest cement content(5%)，shear contraction happens after loading，while pore diameter reducing and coefficient of pore shape increasing. However，shear dilation happens under the highest cement content(20%)，while pore diameter increasing and coefficient of pore shape reducing. During the loading process，under the interaction of internal stress，particles of cemented soils will directionally slide or rotate whether the cement content is lower or higher. Furthermore，pore axis direction of cemented soils is also changed，and orientation angle changed from uniform into concentration，and pore directional characteristic is obvious.
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2016, Vol. 35 
