Laboratory and constitutive modeling of critical state behavior of rockfill aggregates mixed with polymer

Yang, G; Hu, X; Feng, Q; Nimbalkar, S

Laboratory and constitutive modeling of critical state behavior of rockfill aggregates mixed with polymer

Yang, G Hu, X Feng, Q Nimbalkar, S

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Publisher:: AMER SOC TESTING MATERIALS
Publication Type:: Journal Article
Citation:: Journal of Testing and Evaluation, 2021, 49, (6), pp. 4344-4356
Issue Date:: 2021-11-01

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Field	Value	Language
dc.contributor.author	Yang, G
dc.contributor.author	Hu, X
dc.contributor.author	Feng, Q
dc.contributor.author	Nimbalkar, S https://orcid.org/0000-0002-1538-3396
dc.date.accessioned	2022-05-24T01:57:20Z
dc.date.available	2022-05-24T01:57:20Z
dc.date.issued	2021-11-01
dc.identifier.citation	Journal of Testing and Evaluation, 2021, 49, (6), pp. 4344-4356
dc.identifier.issn	0090-3973
dc.identifier.issn	1945-7553
dc.identifier.uri	http://hdl.handle.net/10453/157665
dc.description.abstract	In order to increase the strength and deformation properties of coarse aggregates, the polymer was used as an additive. In this study, a series of triaxial tests were performed to analysis the effect of polymer content on the strength, deformation, and critical state of rockfill aggregates. It is found that the deformation properties are the same for different polymer contents. As the polymer content increases, the peak stress increases, and the volume strain decreases. The addition of polymer mainly led to inducing cohesion in rockfill aggregates while showing a marginal influence on friction angle. The average effective stress, which considered the cohesion of polymer as additional effective stress, was modified. It was observed that the critical state envelopes in q–ppc0 and e–ppc0 were not much influenced by the addition of polymer. A state parameter is used as a function of void ratio and pressure. A boundary surface model of polymer rockfill aggregates based on the critical state approach was proposed. The performance of the model is demonstrated by the results of triaxial tests. The study shows the model could effectively capture the influence of polymer contents and confining pressures on strength and deformation characteristics of rockfill aggregates.
dc.language	English
dc.publisher	AMER SOC TESTING MATERIALS
dc.relation.ispartof	Journal of Testing and Evaluation
dc.relation.isbasedon	10.1520/JTE20200588
dc.rights	info:eu-repo/semantics/embargoedAccess
dc.subject	0912 Materials Engineering, 0913 Mechanical Engineering
dc.subject.classification	Mechanical Engineering & Transports
dc.title	Laboratory and constitutive modeling of critical state behavior of rockfill aggregates mixed with polymer
dc.type	Journal Article
utslib.citation.volume	49
utslib.for	0912 Materials Engineering
utslib.for	0913 Mechanical Engineering
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	open_access	*
utslib.copyright.embargo	2022-11-01T00:00:00+1000Z
dc.date.updated	2022-05-24T01:57:19Z
pubs.issue	6
pubs.publication-status	Published
pubs.volume	49
utslib.citation.issue	6

Abstract:

In order to increase the strength and deformation properties of coarse aggregates, the polymer was used as an additive. In this study, a series of triaxial tests were performed to analysis the effect of polymer content on the strength, deformation, and critical state of rockfill aggregates. It is found that the deformation properties are the same for different polymer contents. As the polymer content increases, the peak stress increases, and the volume strain decreases. The addition of polymer mainly led to inducing cohesion in rockfill aggregates while showing a marginal influence on friction angle. The average effective stress, which considered the cohesion of polymer as additional effective stress, was modified. It was observed that the critical state envelopes in q–ppc0 and e–ppc0 were not much influenced by the addition of polymer. A state parameter is used as a function of void ratio and pressure. A boundary surface model of polymer rockfill aggregates based on the critical state approach was proposed. The performance of the model is demonstrated by the results of triaxial tests. The study shows the model could effectively capture the influence of polymer contents and confining pressures on strength and deformation characteristics of rockfill aggregates.

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http://hdl.handle.net/10453/157665