Property degradation of seawater sea-sand cementitious mortars with GGBFS and glass fibers subjected to elevated temperature

Qu, F; Li, W; Tang, Z; Wang, K

Property degradation of seawater sea-sand cementitious mortars with GGBFS and glass fibers subjected to elevated temperature

Qu, F Li, W

Tang, Z Wang, K

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Publisher:: Elsevier BV
Publication Type:: Journal Article
Citation:: Journal of Materials Research and Technology, 2021, 13, pp. 366-384
Issue Date:: 2021-07-01

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Field	Value	Language
dc.contributor.author	Qu, F
dc.contributor.author	Li, W https://orcid.org/0000-0002-4651-1215
dc.contributor.author	Tang, Z
dc.contributor.author	Wang, K
dc.date.accessioned	2022-05-04T12:31:36Z
dc.date.available	2022-05-04T12:31:36Z
dc.date.issued	2021-07-01
dc.identifier.citation	Journal of Materials Research and Technology, 2021, 13, pp. 366-384
dc.identifier.issn	2238-7854
dc.identifier.uri	http://hdl.handle.net/10453/157005
dc.description.abstract	Effects of ground granulated blast-furnace slag (GGBFS) and glass fiber on the property degradation of seawater sea sand mortar (FSSM) after elevated temperature exposure were investigated in this study. The physical properties and mechanical strength of FSSM were compared with that of cementitious mortar prepared with demineralized water and river sand (FRRM). The results showed that when the mortars were exposed to normal temperature, the compressive strength of FSSM was higher than that of FRRM. GGBFS increased both the compressive and flexural strengths of FSSM, while glass fiber increased the flexural strength but slightly decreased the compressive strength. The maximum flexural strength of FSSM was achieved with 1 wt.% glass fiber and 30% GGBFS. After exposed to temperatures of 200 °C and 400 °C, the flexural and compressive strength losses of FSSM were lower than that of the corresponding FRRM, while the FSSM with glass fiber exhibited more compressive strength loss but less flexural strength loss compared to the FRRM. Additionally, GGBFS could densify the microstructure of FSSM, and decrease the losses of flexural and compressive strength after exposed to elevated temperatures. The calcium aluminosilicate hydrate (C–A–S–H) gels with higher ratios of Si/Ca and Al/Ca in the FSSM with GGBFS were significantly more stable at the temperature of 700 °C compared to the calcium silicate hydrate (C–S–H) gels with lower ratios of Si/Ca and Al/Ca in the FRRM or FSSM without GGBFS. Therefore, it can be included that the high temperature or fire resistance of FSSM can be improved by glass fibers and GGBFS.
dc.language	en
dc.publisher	Elsevier BV
dc.relation	http://purl.org/au-research/grants/arc/IH150100006
dc.relation.ispartof	Journal of Materials Research and Technology
dc.relation.isbasedon	10.1016/j.jmrt.2021.04.068
dc.rights	info:eu-repo/semantics/openAccess
dc.title	Property degradation of seawater sea-sand cementitious mortars with GGBFS and glass fibers subjected to elevated temperature
dc.type	Journal Article
utslib.citation.volume	13
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	*
dc.date.updated	2022-05-04T12:31:34Z
pubs.publication-status	Published
pubs.volume	13

Abstract:

Effects of ground granulated blast-furnace slag (GGBFS) and glass fiber on the property degradation of seawater sea sand mortar (FSSM) after elevated temperature exposure were investigated in this study. The physical properties and mechanical strength of FSSM were compared with that of cementitious mortar prepared with demineralized water and river sand (FRRM). The results showed that when the mortars were exposed to normal temperature, the compressive strength of FSSM was higher than that of FRRM. GGBFS increased both the compressive and flexural strengths of FSSM, while glass fiber increased the flexural strength but slightly decreased the compressive strength. The maximum flexural strength of FSSM was achieved with 1 wt.% glass fiber and 30% GGBFS. After exposed to temperatures of 200 °C and 400 °C, the flexural and compressive strength losses of FSSM were lower than that of the corresponding FRRM, while the FSSM with glass fiber exhibited more compressive strength loss but less flexural strength loss compared to the FRRM. Additionally, GGBFS could densify the microstructure of FSSM, and decrease the losses of flexural and compressive strength after exposed to elevated temperatures. The calcium aluminosilicate hydrate (C–A–S–H) gels with higher ratios of Si/Ca and Al/Ca in the FSSM with GGBFS were significantly more stable at the temperature of 700 °C compared to the calcium silicate hydrate (C–S–H) gels with lower ratios of Si/Ca and Al/Ca in the FRRM or FSSM without GGBFS. Therefore, it can be included that the high temperature or fire resistance of FSSM can be improved by glass fibers and GGBFS.

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http://hdl.handle.net/10453/157005