Study on the relationship between permeability coefficient and porosity, the confining and osmotic pressure of attapulgite-modified loess

Zhengrui Zhang and Ahad Amini Pishro and Lili Zhang and Xuejiao Ma and Siti Jahara Matlan and NazaruddinAbdulTaha and MojdehAmini Pishro (2023) Study on the relationship between permeability coefficient and porosity, the confining and osmotic pressure of attapulgite-modified loess. Scientifc Reports. pp. 1-15. ISSN 2045-2322

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URL: https://www.researchgate.net/publication/374195932...

Abstract

This study investigated attapulgite-modifed loess as an efcient and cost-efective method for creating an impermeable liner for landflls in regions with scarce clay resources. Laboratory permeability tests were conducted using a fexible wall permeameter to determine the permeability of compacted loess and attapulgite mixtures under varying osmotic conditions. The relationship between the permeability coefcient, attapulgite dosage, radial pressure, and osmotic pressure was analyzed. Nuclear magnetic resonance and scanning electron microscopy were also used to observe the microstructure of the modifed loess. The results showed that attapulgite dosage signifcantly reduced the permeability coefcient, but the efect became limited when the content surpassed 10%. The decrease of the permeability coefcient of the modifed loess is mainly due to the flling of pores between the loess by attapulgite, which makes the pore size and throat size of the modifed loess smaller. The modifed loess displayed a sheet structure that contributed to an increased permeability coefcient due to increased radial pressure. This study provides valuable insights into using attapulgite-modifed loess as a material for landfll lining in regions with scarce clay resources.

Item Type:	Article
Keyword:	Attapulgite , Environmental Sanitation, cohesive soil
Subjects:	T Technology > TD Environmental technology. Sanitary engineering > TD1-1066 Environmental technology. Sanitary engineering T Technology > TN Mining engineering. Metallurgy > TN1-997 Mining engineering. Metallurgy
Department:	FACULTY > Faculty of Engineering
Depositing User:	ABDULLAH BIN SABUDIN -
Date Deposited:	19 Jan 2024 10:59
Last Modified:	19 Jan 2024 10:59
URI:	https://eprints.ums.edu.my/id/eprint/37983

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