Ageing coefficient for early age tensile creep of blended slag and low calcium fly ash geopolymer concrete

Cheng, ZQ; Zhao, R; Yuan, Y; Li, F; Castel, A; Xu, T

Ageing coefficient for early age tensile creep of blended slag and low calcium fly ash geopolymer concrete

Cheng, ZQ Zhao, R Yuan, Y Li, F Castel, A

Xu, T

Permalink

Publisher:: Elsevier BV
Publication Type:: Journal Article
Citation:: Construction and Building Materials, 2020, 262, pp. 119855-119855
Issue Date:: 2020-11-30

Closed Access

	Filename	Description	Size
	1-s2.0-S0950061820318602-main.pdf	Published version	1.66 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	Cheng, ZQ
dc.contributor.author	Zhao, R
dc.contributor.author	Yuan, Y
dc.contributor.author	Li, F
dc.contributor.author	Castel, A https://orcid.org/0000-0003-1619-9643
dc.contributor.author	Xu, T
dc.date.accessioned	2020-10-28T21:09:09Z
dc.date.available	2020-10-28T21:09:09Z
dc.date.issued	2020-11-30
dc.identifier.citation	Construction and Building Materials, 2020, 262, pp. 119855-119855
dc.identifier.issn	0950-0618
dc.identifier.uri	http://hdl.handle.net/10453/143564
dc.description.abstract	© 2020 Elsevier Ltd The ageing coefficient is required in the age-adjusted effective modulus method to assess the effect of creep in concrete structures subjected to varied stress history. In this paper, experiments were carried out to calibrate the ageing coefficient for early age tensile creep of blended slag and low calcium fly ash geopolymer concrete. The development of total strains of geopolymer concrete under sustained tension, including instantaneous strain, creep strain and shrinkage strain was monitored by using the dog-bone shaped specimens. The specimens were loaded at the age of 2, 3, 4, 7, 14, 21 days, respectively. The strains of the unloaded companion specimens were monitored as well. The development of the creep coefficient φ(t,τ0) for geopolymer concrete was calculated based on the experimental results. By using the step-by-step numerical analysis, the ageing coefficient for early age tensile creep of geopolymer concrete was assessed. An ageing coefficient of 0.8 is recommended for structural design. The comparison between calculated and measured tensile strains from the restrained concrete ring test shows the validity of the proposed value of the ageing coefficient.
dc.language	en
dc.publisher	Elsevier BV
dc.relation.ispartof	Construction and Building Materials
dc.relation.isbasedon	10.1016/j.conbuildmat.2020.119855
dc.rights	info:eu-repo/semantics/restrictedAccess
dc.subject	0905 Civil Engineering, 1202 Building
dc.subject.classification	Building & Construction
dc.title	Ageing coefficient for early age tensile creep of blended slag and low calcium fly ash geopolymer concrete
dc.type	Journal Article
utslib.citation.volume	262
utslib.for	0905 Civil Engineering
utslib.for	1202 Building
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	2020-10-28T21:09:04Z
pubs.publication-status	Accepted
pubs.volume	262

Abstract:

© 2020 Elsevier Ltd The ageing coefficient is required in the age-adjusted effective modulus method to assess the effect of creep in concrete structures subjected to varied stress history. In this paper, experiments were carried out to calibrate the ageing coefficient for early age tensile creep of blended slag and low calcium fly ash geopolymer concrete. The development of total strains of geopolymer concrete under sustained tension, including instantaneous strain, creep strain and shrinkage strain was monitored by using the dog-bone shaped specimens. The specimens were loaded at the age of 2, 3, 4, 7, 14, 21 days, respectively. The strains of the unloaded companion specimens were monitored as well. The development of the creep coefficient φ(t,τ0) for geopolymer concrete was calculated based on the experimental results. By using the step-by-step numerical analysis, the ageing coefficient for early age tensile creep of geopolymer concrete was assessed. An ageing coefficient of 0.8 is recommended for structural design. The comparison between calculated and measured tensile strains from the restrained concrete ring test shows the validity of the proposed value of the ageing coefficient.

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

http://hdl.handle.net/10453/143564