Assessing carbonation in one-part fly ash/slag geopolymer mortar: Change in pore characteristics using the state-of-the-art technique neutron tomography

Vu, TH; Gowripalan, N; De Silva, P; Paradowska, A; Garbe, U; Kidd, P; Sirivivatnanon, V

Assessing carbonation in one-part fly ash/slag geopolymer mortar: Change in pore characteristics using the state-of-the-art technique neutron tomography

Vu, TH Gowripalan, N

De Silva, P Paradowska, A Garbe, U Kidd, P Sirivivatnanon, V

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Publisher:: Elsevier BV
Publication Type:: Journal Article
Citation:: Cement and Concrete Composites, 2020, 114, pp. 103759-103759
Issue Date:: 2020-11-01

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Field	Value	Language
dc.contributor.author	Vu, TH
dc.contributor.author	Gowripalan, N https://orcid.org/0000-0001-6930-2056
dc.contributor.author	De Silva, P
dc.contributor.author	Paradowska, A
dc.contributor.author	Garbe, U
dc.contributor.author	Kidd, P
dc.contributor.author	Sirivivatnanon, V https://orcid.org/0000-0003-1901-6064
dc.date.accessioned	2020-10-31T22:18:17Z
dc.date.available	2020-10-31T22:18:17Z
dc.date.issued	2020-11-01
dc.identifier.citation	Cement and Concrete Composites, 2020, 114, pp. 103759-103759
dc.identifier.issn	0958-9465
dc.identifier.uri	http://hdl.handle.net/10453/143660
dc.description.abstract	© 2020 Elsevier Ltd Carbonation has long been recognised as a durability issue attributed to corrosion of steel reinforcement in geopolymer materials. The currently available information, however, is not sufficient to gain a deep understanding of this issue, particularly the facet of the carbonation impact on the pore structure of such materials. This paper, thus, assessed the influence of carbonation on porosity and pore size characteristics of one-part fly ash/slag geopolymer mortar, by using neutron tomography. The cutting-edge thermal neutron tomography used in this study provided the prowess of non-destructive 3D analysis of exploring different regions within geopolymers. The results obtained showed that carbonation in the investigated geopolymer mortars drew their porosity down approximately 30% and shifted pore size regions to smaller pore areas. Other evaluations such as changing pH, carbonation front depth and elemental mapping by scanning electron microscopy (SEM) with energy dispersive X-ray spectrometry (EDS) were also performed in this study, in order to supplement the findings of neutron tomography.
dc.language	en
dc.publisher	Elsevier BV
dc.relation	http://purl.org/au-research/grants/arc/IH150100006
dc.relation.ispartof	Cement and Concrete Composites
dc.relation.isbasedon	10.1016/j.cemconcomp.2020.103759
dc.rights	info:eu-repo/semantics/restrictedAccess
dc.subject	0904 Chemical Engineering, 0905 Civil Engineering, 1202 Building
dc.subject.classification	Building & Construction
dc.title	Assessing carbonation in one-part fly ash/slag geopolymer mortar: Change in pore characteristics using the state-of-the-art technique neutron tomography
dc.type	Journal Article
utslib.citation.volume	114
utslib.for	0904 Chemical Engineering
utslib.for	0905 Civil Engineering
utslib.for	0904 Chemical Engineering
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
pubs.organisational-group	/University of Technology Sydney/Strength - CBI - Centre for Built Infrastructure
utslib.copyright.status	closed_access	*
dc.date.updated	2020-10-31T22:17:17Z
pubs.publication-status	Accepted
pubs.volume	114

Abstract:

© 2020 Elsevier Ltd Carbonation has long been recognised as a durability issue attributed to corrosion of steel reinforcement in geopolymer materials. The currently available information, however, is not sufficient to gain a deep understanding of this issue, particularly the facet of the carbonation impact on the pore structure of such materials. This paper, thus, assessed the influence of carbonation on porosity and pore size characteristics of one-part fly ash/slag geopolymer mortar, by using neutron tomography. The cutting-edge thermal neutron tomography used in this study provided the prowess of non-destructive 3D analysis of exploring different regions within geopolymers. The results obtained showed that carbonation in the investigated geopolymer mortars drew their porosity down approximately 30% and shifted pore size regions to smaller pore areas. Other evaluations such as changing pH, carbonation front depth and elemental mapping by scanning electron microscopy (SEM) with energy dispersive X-ray spectrometry (EDS) were also performed in this study, in order to supplement the findings of neutron tomography.

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http://hdl.handle.net/10453/143660