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Test Study on Mechanical Properties of the Lime Stabilized Expansive Soil under Wet and Dry Cycle

Lime Stabilized expansive soil is often used as filler in road subgrade, although many scholars have done a lot of research, the mechanical properties under wet and dry cycle role remains unclear. The paper Carried out direct shear test, consolidation test and CBR test on the lime stabilized expansive soil after the different times of wet and dry cycle. The test results show: The strength of soil will decrease, especially in previous cycle, and the trends can be expressed with logarithmic model; the deformation index (compression coefficient) of soil will increase, especially in previous cycle, and the trend can be expressed with powder model; through more cycles, no matter the strength or the deformation index of the sample tends to a stable value; the stable intensity is about 40%-60% of the original intensity.