冻融和易溶盐对石灰固化伊犁黄土强度及水稳性的影响

doi:10.11896/cldb.23120250

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Abstract Freeze-thaw cycle and soluble salt are main reasons for the damage of soils of water conveyance channels in cold regions. To explore the influence mechanism and degree of freeze-thaw cycle and soluble salt content on strength, water stability and pore structure of lime-treated Ili loess, unconfined compressive strength test, disintegration test, permeability test and nuclear magnetic resonance test are employed here. The results show that the freeze-thaw cycle has obvious deterioration on the strength of lime-treated Ili loess. The deterioration of strength is serious in early freeze-thaw cycle stage, and the higher the content of soluble salt, the deterioration of strength due to freeze-thaw cycle. When the content of soluble salt is higher than 14 g/kg, the deterioration rate on the strength decreases. The disintegration of lime solidified Ili loess is accelerated with the increase of freeze-thaw cycles and soluble salt content, and the soluble salt content has a great effect on loess water stability. When the soluble salt content is higher than 8 g/kg, the disintegration rate increased significantly. The permeability increases with the increase of freeze-thaw cycle and soluble salt content, and the effect of freeze-thaw cycle is more significant than that of soluble salt content. When the content of soluble salt is 26 g/kg, the permeability coefficient decreases obviously due to the effect of osmotic suction. The modal size of loess pores increases with freeze-thaw cycle increasing, which mainly affects the medium pores and large pores. And the effect of freeze-thaw cycle on pore structure of loess is higher than that of soluble salt content. Considering freeze-thaw cycle and controlling soluble salt content is very important for strength and water stability of soil in cold region.

Key words： lime treated Ili loess freeze-thaw salt content strength degradation water stability

Published: 25 March 2025 Online: 2025-03-24

CLC number:

TU432

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	LIANG Zhichao
	REN Wenyuan
	LI Shuangcun
	ZHANG Aijun
	WANG Yuguo

Cite this article:

LIANG Zhichao,REN Wenyuan,LI Shuangcun, et al. Effect of Soluble Saltand Freeze-thaw Cycle on Strength Deterioration and Water Stability of Lime-treated Ili Loess[J]. Materials Reports, 2025, 39(6): 23120250-8.

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https://www.mater-rep.com/EN/10.11896/cldb.23120250 OR https://www.mater-rep.com/EN/Y2025/V39/I6/23120250

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