A mixture of coal wash and fly ash as a pavement substructure material

Wang, D; Tawk, M; Indraratna, B; Heitor, A; Rujikiatkamjorn, C

A mixture of coal wash and fly ash as a pavement substructure material

Wang, D Tawk, M Indraratna, B

Heitor, A Rujikiatkamjorn, C

Permalink

Publication Type:: Journal Article
Citation:: Transportation Geotechnics, 2019, 21, pp. 100265
Issue Date:: 2019-12-01

Closed Access

	Filename	Description	Size
	1-s2.0-S2214391219302144-main.pdf	Published Version	2.35 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	Wang, D
dc.contributor.author	Tawk, M
dc.contributor.author	Indraratna, B https://orcid.org/0000-0002-9057-1514
dc.contributor.author	Heitor, A
dc.contributor.author	Rujikiatkamjorn, C
dc.date.accessioned	2020-04-29T21:35:30Z
dc.date.available	2020-04-29T21:35:30Z
dc.date.issued	2019-12-01
dc.identifier.citation	Transportation Geotechnics, 2019, 21, pp. 100265
dc.identifier.issn	2214-3912
dc.identifier.issn	2214-3912
dc.identifier.uri	http://hdl.handle.net/10453/140332
dc.description.abstract	© 2019 Elsevier Ltd The reuse of waste materials in engineering projects has become the subject of many research efforts worldwide as it provides economical as well as environmental benefits. Coal wash (CW) and fly ash (FA) are example waste materials that can be used as alternative aggregates in transportation infrastructure projects, specifically as base and subbase materials in roads. Class C FA has been extensively used as a stabilizing material due to its hardening potential. However, Class F fly ash, a non-pozzolanic material when used alone, has not been considered in past research projects. In this study, Class F fly ash is mixed with coal wash as a void filler to enhance its compaction efficiency and produce a compact and well interlocked structure. A laboratory testing plan is performed to assess the geotechnical properties of the mixtures with 0%, 7%, 10% and 13% FA content and it includes compaction tests, unconfined compressive strength tests, California Bearing Ratio (CBR) tests, collapse potential tests and permeability tests. The mixture with 7% FA is selected as the optimum mixture and its potential for tensile cracking under service loads is further investigated using four-point bending tests. Also, the resilient modulus and permanent deformations of the mixture are evaluated under different dry-back conditions using multistage repeated load triaxial tests.
dc.language	en
dc.relation	http://purl.org/au-research/grants/arc/LP160100280
dc.relation.ispartof	Transportation Geotechnics
dc.relation.isbasedon	10.1016/j.trgeo.2019.100265
dc.rights	info:eu-repo/semantics/closedAccess
dc.subject	0905 Civil Engineering
dc.title	A mixture of coal wash and fly ash as a pavement substructure material
dc.type	Journal Article
utslib.citation.volume	21
utslib.for	0905 Civil Engineering
utslib.for	0905 Civil 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	*
dc.date.updated	2020-04-29T21:35:24Z
pubs.publication-status	Published
pubs.volume	21
utslib.start-page	100265

Abstract:

© 2019 Elsevier Ltd The reuse of waste materials in engineering projects has become the subject of many research efforts worldwide as it provides economical as well as environmental benefits. Coal wash (CW) and fly ash (FA) are example waste materials that can be used as alternative aggregates in transportation infrastructure projects, specifically as base and subbase materials in roads. Class C FA has been extensively used as a stabilizing material due to its hardening potential. However, Class F fly ash, a non-pozzolanic material when used alone, has not been considered in past research projects. In this study, Class F fly ash is mixed with coal wash as a void filler to enhance its compaction efficiency and produce a compact and well interlocked structure. A laboratory testing plan is performed to assess the geotechnical properties of the mixtures with 0%, 7%, 10% and 13% FA content and it includes compaction tests, unconfined compressive strength tests, California Bearing Ratio (CBR) tests, collapse potential tests and permeability tests. The mixture with 7% FA is selected as the optimum mixture and its potential for tensile cracking under service loads is further investigated using four-point bending tests. Also, the resilient modulus and permanent deformations of the mixture are evaluated under different dry-back conditions using multistage repeated load triaxial tests.

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

http://hdl.handle.net/10453/140332