Improving Geotechnical Properties of Closed Landfills for Redevelopment Using Chemical Stabilization Techniques: A Case Study on Samples of a Landfill Site in Southwest of Sydney

Fatahi, B; Khabbaz, H

Improving Geotechnical Properties of Closed Landfills for Redevelopment Using Chemical Stabilization Techniques: A Case Study on Samples of a Landfill Site in Southwest of Sydney

Fatahi, B

Khabbaz, H

Permalink

Publication Type:: Chapter
Citation:: Ground Improvement Case Histories: Chemical, Electrokinetic, Thermal and Bioengineering Methods, 2015, pp. 239 - 266
Issue Date:: 2015-05-22

Closed Access

	Filename	Description	Size
	Behnam Book Chapter.pdf	Published version	652.52 kB	Adobe PDF	View/Open
	book chapter Cover.pdf	Published version	1.55 MB	Adobe PDF	View/Open

Copyright Clearance Process

Recently Added
In Progress
Closed Access

This item is closed access and not available.

Full metadata record

Field	Value	Language
dc.contributor.author	Fatahi, B https://orcid.org/0000-0002-7920-6946	en_US
dc.contributor.author	Khabbaz, H https://orcid.org/0000-0001-6637-4601	en_US
dc.date.issued	2015-05-22	en_US
dc.identifier.citation	Ground Improvement Case Histories: Chemical, Electrokinetic, Thermal and Bioengineering Methods, 2015, pp. 239 - 266	en_US
dc.identifier.isbn	9780081001912	en_US
dc.identifier.uri	http://hdl.handle.net/10453/36527
dc.description.abstract	© 2015 Elsevier Ltd. All rights reserved. Construction on closed landfill sites is generally a challenging task due to the complex behavior of creep, settlement, high amount of moisture content, and weak shear strength of waste materials. This chapter presents the experimental results and numerical analyses for the use of fly ash and quicklime in improvement of the geotechnical properties of municipal solid wastes (MSW). The waste materials were collected from a closed landfill in the southwest of Sydney. The samples were prepared by integrating MSW with a mixture of fly ash-quicklime with a ratio of 3:1 in percentages of 5, 10, 15, and 20 of fly ash by dry weight of the MSW. A series of experimental tests and numerical analysis were conducted on treated and untreated MSW samples. It was found that the chemical stabilization effectively increased the compressive strength, the shear strength parameters, the stiffness, and the brittleness index, whereas it decreased the settlement and the permeability of the MSW layer. The finite element program, PLAXIS version 9, was used to evaluate the settlement of a landfill model. The laboratory results were used to validate the numerical model. The settlement of the landfill model 10 and 20 years after the surcharge load was applied for different fly ash-quicklime contents and various depths of improvement was estimated. Results indicated that treatment of MSW significantly reduced the vertical displacement of the landfill model under surcharge load. This reduction was greater with higher depths of improvement.	en_US
dc.relation.ispartof	Ground Improvement Case Histories: Chemical, Electrokinetic, Thermal and Bioengineering Methods	en_US
dc.relation.isbasedon	10.1016/B978-0-08-100191-2.00008-3	en_US
dc.title	Improving Geotechnical Properties of Closed Landfills for Redevelopment Using Chemical Stabilization Techniques: A Case Study on Samples of a Landfill Site in Southwest of Sydney	en_US
dc.type	Chapter
utslib.for	0905 Civil Engineering	en_US
utslib.for	090501 Civil Geotechnical Engineering	en_US
pubs.embargo.period	Not known	en_US
pubs.organisational-group	/University of Technology Sydney
pubs.organisational-group	/University of Technology Sydney/Faculty of Engineering and Information Technology
pubs.organisational-group	/University of Technology Sydney/Faculty of Engineering and Information Technology/School of Civil and Environmental Engineering
pubs.organisational-group	/University of Technology Sydney/Strength - CBI - Centre for Built Infrastructure
utslib.copyright.status	closed_access
pubs.publication-status	Published	en_US

Abstract:

© 2015 Elsevier Ltd. All rights reserved. Construction on closed landfill sites is generally a challenging task due to the complex behavior of creep, settlement, high amount of moisture content, and weak shear strength of waste materials. This chapter presents the experimental results and numerical analyses for the use of fly ash and quicklime in improvement of the geotechnical properties of municipal solid wastes (MSW). The waste materials were collected from a closed landfill in the southwest of Sydney. The samples were prepared by integrating MSW with a mixture of fly ash-quicklime with a ratio of 3:1 in percentages of 5, 10, 15, and 20 of fly ash by dry weight of the MSW. A series of experimental tests and numerical analysis were conducted on treated and untreated MSW samples. It was found that the chemical stabilization effectively increased the compressive strength, the shear strength parameters, the stiffness, and the brittleness index, whereas it decreased the settlement and the permeability of the MSW layer. The finite element program, PLAXIS version 9, was used to evaluate the settlement of a landfill model. The laboratory results were used to validate the numerical model. The settlement of the landfill model 10 and 20 years after the surcharge load was applied for different fly ash-quicklime contents and various depths of improvement was estimated. Results indicated that treatment of MSW significantly reduced the vertical displacement of the landfill model under surcharge load. This reduction was greater with higher depths of improvement.

Please use this identifier to cite or link to this item:

http://hdl.handle.net/10453/36527