Micro-CT Scanning to Examine Soil Clogging Behavior of Natural Fiber Drains

Nguyen, TT; Indraratna, B

Micro-CT Scanning to Examine Soil Clogging Behavior of Natural Fiber Drains

Nguyen, TT Indraratna, B

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Publication Type:: Journal Article
Citation:: Journal of Geotechnical and Geoenvironmental Engineering, 2019, 145, (9)
Issue Date:: 2019-01-01

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Field	Value	Language
dc.contributor.author	Nguyen, TT
dc.contributor.author	Indraratna, B https://orcid.org/0000-0002-9057-1514
dc.date.accessioned	2020-04-30T05:01:54Z
dc.date.available	2020-04-30T05:01:54Z
dc.date.issued	2019-01-01
dc.identifier.citation	Journal of Geotechnical and Geoenvironmental Engineering, 2019, 145, (9)
dc.identifier.issn	0733-9410
dc.identifier.issn	1090-0241
dc.identifier.uri	http://hdl.handle.net/10453/140356
dc.description.abstract	© 2019 American Society of Civil Engineers. The use of jute and coir fibers as natural fiber drains to facilitate drainage and soft soil stabilization has been proposed for decades. However, their uncertain hydraulic behavior has often hampered their wider application in major infrastructure projects. Because these drains have a complex porous structure that can trap soil particles and reduce their discharge capacity, a comprehensive laboratory investigation in which soft soil was used to interact with different fiber drains under varying confining pressure was conducted via a discharge capacity test scheme. Nondestructive micro-computed tomography (CT) scanning followed by a series of image processing techniques was applied to the drains to capture their three-dimensional porous characteristics, which were then used to clarify their hydraulic behavior. The study revealed that there are two major types of components - intra- and interbundle voids - making porosity in a fiber drain, and they can be used to evaluate the drain discharge capacity. The larger the interbundle porosity, the higher the drain discharge capacity. Jute filters not only enlarge the interbundle porosity but also - if they are thick enough - help drains resist undue lateral pressure and clogging. Fiber drains are more sensitive to confinement than polymeric drains, because their discharge capacity decreases considerably at higher confining pressures. This study enables the hydraulic properties of natural fiber drains subjected to soil clogging to be properly understood so that drain designs can be optimized to make them more competitive with conventional polymeric drains.
dc.language	en
dc.relation	http://purl.org/au-research/grants/arc/LP140100065
dc.relation.ispartof	Journal of Geotechnical and Geoenvironmental Engineering
dc.relation.isbasedon	10.1061/(ASCE)GT.1943-5606.0002065
dc.rights	info:eu-repo/semantics/closedAccess
dc.subject	0905 Civil Engineering, 0907 Environmental Engineering
dc.subject.classification	Geological & Geomatics Engineering
dc.title	Micro-CT Scanning to Examine Soil Clogging Behavior of Natural Fiber Drains
dc.type	Journal Article
utslib.citation.volume	145
utslib.for	0905 Civil Engineering
utslib.for	0907 Environmental Engineering
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
utslib.copyright.status	closed_access	*
pubs.consider-herdc	false
dc.date.updated	2020-04-30T05:01:49Z
pubs.issue	9
pubs.publication-status	Published
pubs.volume	145
utslib.citation.issue	9

Abstract:

© 2019 American Society of Civil Engineers. The use of jute and coir fibers as natural fiber drains to facilitate drainage and soft soil stabilization has been proposed for decades. However, their uncertain hydraulic behavior has often hampered their wider application in major infrastructure projects. Because these drains have a complex porous structure that can trap soil particles and reduce their discharge capacity, a comprehensive laboratory investigation in which soft soil was used to interact with different fiber drains under varying confining pressure was conducted via a discharge capacity test scheme. Nondestructive micro-computed tomography (CT) scanning followed by a series of image processing techniques was applied to the drains to capture their three-dimensional porous characteristics, which were then used to clarify their hydraulic behavior. The study revealed that there are two major types of components - intra- and interbundle voids - making porosity in a fiber drain, and they can be used to evaluate the drain discharge capacity. The larger the interbundle porosity, the higher the drain discharge capacity. Jute filters not only enlarge the interbundle porosity but also - if they are thick enough - help drains resist undue lateral pressure and clogging. Fiber drains are more sensitive to confinement than polymeric drains, because their discharge capacity decreases considerably at higher confining pressures. This study enables the hydraulic properties of natural fiber drains subjected to soil clogging to be properly understood so that drain designs can be optimized to make them more competitive with conventional polymeric drains.

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http://hdl.handle.net/10453/140356