不同吸水环境下碱渣固化淤泥毛细吸水和强度性质

doi:10.11896/cldb.22100254

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Abstract Capillary water absorption occurs in solidified soft soil above the groundwater level, which may have an adverse impact on durability of solidified soil. The soft soil was solidified with soda residue (SR), ground granulated blast furnace slag and carbide slag. The capillary water absorption, unconfined compressive strength (UCS), X-ray diffraction and nuclear magnetic resonance tests of solidified soil under different water absorption environments were carried out to study the variation of capillary transport coefficient and strength and its microscopic mechanism. The results show that the ratio of capillary coefficient (κ) to capillary sorptivity (s) are in the range of 2.3 to 3.2. The s and κ of solidified soil decrease at first and then increase with the increase of SR content, and the minimum s and κ values and capillary pore volume occur at 25% SR content. With the increase of salt concentration, more ettringite is generated and sodium chloride migrates and aggregates. Accordingly, the volume of capillary pores and the capillary absorption capacity of solidified soil increase, which contributes to the increase of s and κ values and the decrease of UCS. The decrease in UCS at seawater environment for SR solidified soil is greater than that for cement solidified soil. It is necessary to pay attention to the adverse effect of capillary absorption on durability of soil solidified with industrial solid wastes such as SR.

Key words： soil solidified with soda residue capillary adsorption water environment capillary water transport coefficients unconfined compressive strength

Published: 10 May 2024 Online: 2024-05-13

CLC number:

TU443

Fund:National Natural Science Foundation of China (41772332).

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	Articles by authors
	HE Jun
	LUO Shiru
	LONG Sihao
	ZHU Yuanjun

Cite this article:

HE Jun,LUO Shiru,LONG Sihao, et al. Capillary Water Absorption and Strength of Soft Soil Solidified with Soda Residue Under Different Water Environments[J]. Materials Reports, 2024, 38(9): 22100254-6.

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http://www.mater-rep.com/EN/10.11896/cldb.22100254 OR http://www.mater-rep.com/EN/Y2024/V38/I9/22100254

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