Comparative study on mechanical properties of different subgrade materials under freeze-thaw cycles
In order to explore the strength characteristics of foamed light soil,a new type of roadbed material,the freeze-thaw strength damage test of foamed light soil roadbed under different wet densities was completed.By comparing the new foamed light soil with the traditional cement im-proved soil,it is found that the strength of the cement improved soil will decrease greatly in the early freeze-thaw stage,but the compressive strength will rise after about 5 freeze-thaw cycles.The compressive strength of foamed soil decreases slowly with the increase of freeze-thaw cycles from the beginning to the end.In terms of strength loss,the strength loss rate of the two subgrade materials is different,and the compressive strength decline rate of the cement-improved soil is fas-ter than that of the foamed light soil.The loss rate of foamed light soil fluctuates little with the number of cycles,and the phase is relatively stable.The freeze-thaw cycle has a large discrete effect on the loss rate of cement improved soil.
foamed light soilCement improved soilFreeze-thaw cycleStrength loss rate
万方数据
维普
