矿渣-粉煤灰基地质聚合物固化铅污染土冻融特性研究

doi:10.11896/cldb.25010037

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Abstract Freeze-thaw cycle will intensify the penetration of the heavy metal lead (Pb) in the contaminated site, and geopolymer can effectively reme-diate lead-contaminated sites. Based on mass loss, unconfined compressive strength (UCS), ion leaching test, and microstructure analysis, the physical and mechanical properties of geopolymer stabilized Pb-contaminated soil under freeze-thaw cycles were studied, and revealed its microscopic mechanism of action. The results indicate that as lead concentration and freeze-thaw cycles increase, the mass loss and strength loss of geopolymer stabilized soil gradually rise, but the rate of strength loss slows and tends to stabilize with more freeze-thaw cycles. The primary cause of performance degradation of stabilized contaminated soil was identified as the widening of pores and cracks. However, geopolymer can still maintain the stabilization rate of lead ions above 99%.

Key words： geopolymer stabilized Pb-contaminated soil freeze-thaw characteristics microstructure freeze resistance mechanism

Published: 25 January 2026 Online: 2026-01-27

CLC number:

TU411

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	Articles by authors
	YU Guanglei
	LI Liang
	ZHENG Xiyao
	WU Jun
	DU Xiuli

Cite this article:

YU Guanglei,LI Liang,ZHENG Xiyao, et al. Freeze-Thaw Characteristics Study of Slag-Fly Ash Based Geopolymer Stabilized Pb-contaminated Soil[J]. Materials Reports, 2026, 40(2): 25010037-7.

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https://www.mater-rep.com/EN/10.11896/cldb.25010037 OR https://www.mater-rep.com/EN/Y2026/V40/I2/25010037

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