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dc.contributor.authorZhang, Hongen
dc.contributor.authorLi, L.
dc.contributor.authorLong, T.
dc.contributor.authorSarker, Prabir
dc.contributor.authorShi, X.
dc.contributor.authorCai, G.
dc.contributor.authorWang, Q.
dc.date.accessioned2019-09-16T03:30:36Z
dc.date.available2019-09-16T03:30:36Z
dc.date.issued2019
dc.identifier.citationZhang, H. and Li, L. and Long, T. and Sarker, P.K. and Shi, X. and Cai, G. and Wang, Q. 2019. The effect of ordinary portland cement substitution on the thermal stability of geopolymer concrete. Materials. 12 (16): 2501.
dc.identifier.urihttp://hdl.handle.net/20.500.11937/76281
dc.identifier.doi10.3390/ma12162501
dc.description.abstract

© 2019 by the authors. The influence of using cement on the residual properties of fly ash geopolymer concrete (FAGC) after exposure to high temperature of up to 800 °C was studied in terms of mass loss, residual compressive strength and microstructure. The mass loss was found to increase with the increase of exposure temperature, which is attributed to vaporization of water and dehydroxylation of sodium aluminosilicate hydrate (N-A-S-H) gels. The dehydroxylation of calcium silicate hydrate (C-S-H) gels and the disintegration of portlandite were responsible for higher mass loss ratio of FAGCs containing cement. The results showed that cement could increase compressive strength of FAGCs up to 200 °C, after which a significant reduction in residual strength was observed. It was found that FAGCs without cement yielded higher residual strength than the original strength after heating up to 600 °C. The observed increase of compressive strength up to 200 °C was attributed to the secondary geopolymerization which was evidenced in the scanning electronic microscopy (SEM) images.

dc.languageeng
dc.rights.urihttps://creativecommons.org/licenses/by/4.0/
dc.subjectelevated temperatures
dc.subjectgeopolymer concrete
dc.subjectmass loss ratio
dc.subjectresidual compressive strength
dc.subjectsecondary geopolymerization
dc.titleThe effect of ordinary portland cement substitution on the thermal stability of geopolymer concrete
dc.typeJournal Article
dcterms.source.volume12
dcterms.source.number16
dcterms.source.issn1996-1944
dcterms.source.titleMaterials
dc.date.updated2019-09-16T03:30:35Z
curtin.departmentSchool of Civil and Mechanical Engineering
curtin.accessStatusOpen access
curtin.facultyFaculty of Science and Engineering
curtin.contributor.orcidSarker, Prabir [0000-0002-5014-7444]
dcterms.source.eissn1996-1944
curtin.contributor.scopusauthoridSarker, Prabir [6603379031]


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