Abstract：The water content of solidified soil often changes periodically when it is used as artificial fill or subgrade material for resource utilization due to the rainfall and evaporation，ground water level fluctuation and so on. Study on the water retention characteristics of solidified soil has theoretical and engineering application significance. There are few researches on soil-water characteristic curve(SWCC) of solidified soil，the unified and clear SWCC of solidified soil within the full suction range has not been obtained until now. The law of water retention of solidified soil is not clear yet. The SWCC of solidified soil in full suction range under drying path and wetting were measured by pressure plate method，filter paper method and vapor equilibrium technique. In combination with scanning electron microscope scanning test and mercury pressure test，the SWCC and the water retention characteristics of solidified soil with different cement contents were analyzed. The results show that the pore distribution of the solidified soil becomes more uniform with the increase of cement content. With the increase of cement content，the large pores between soil particles and the total pore volume gradually decrease，resulting in a higher water retention capacity of the solidified soil. The SWCCs of solidified soil under drying and wetting paths show significant hysteretic behavior. With the increase of cement content, the surface roughness of soil aggregates increases due to the increase of hydration products. The hysteresis of SWCC becomes more obvious with the increase of cement content.
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2023, Vol. 42 
