Experimental investigation of heating–cooling effects on the mechanical properties of geopolymer-based high performance concrete heated to elevated temperatures

Liu, K; Liu, J; Li, J; Tao, M; Wu, C

Experimental investigation of heating–cooling effects on the mechanical properties of geopolymer-based high performance concrete heated to elevated temperatures

Liu, K Liu, J Li, J

Tao, M Wu, C

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Publisher:: ELSEVIER SCIENCE INC
Publication Type:: Journal Article
Citation:: Structures, 2023, 47, pp. 735-747
Issue Date:: 2023-01-01

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Field	Value	Language
dc.contributor.author	Liu, K
dc.contributor.author	Liu, J
dc.contributor.author	Li, J https://orcid.org/0000-0003-2457-1994
dc.contributor.author	Tao, M
dc.contributor.author	Wu, C https://orcid.org/0000-0001-6786-7934
dc.date.accessioned	2023-03-26T21:37:39Z
dc.date.available	2023-03-26T21:37:39Z
dc.date.issued	2023-01-01
dc.identifier.citation	Structures, 2023, 47, pp. 735-747
dc.identifier.issn	2352-0124
dc.identifier.issn	2352-0124
dc.identifier.uri	http://hdl.handle.net/10453/168421
dc.description.abstract	In this study, geopolymer-based high performance concrete (G-HPC) reinforced with steel fibres was utilized to investigate its dynamic behaviour after heating–cooling treatment. A furnace with a heating capacity of 1100 °C was adopted to heat the specimens. The P-wave velocity and quasi-static uniaxial compressive strength of G-HPC after the heating–cooling treatment were obtained and compared with those without the heating–cooling treatment. The experimental findings indicated that the G-HPC specimens suffered different degrees of thermal damage under 250–1000 °C high temperature, while it still remained a good explosive spalling resistance. Moreover, the water cooling regime would cause more serious damage to the G-HPC specimens than the natural cooling. Further, a 50 mm-diameter Split Hopkinson Pressure Bar (SHPB) apparatus was applied to characterize the dynamic behaviour of G-HPC after the heating–cooling treatment, and a high-speed camera was employed to record the failure process. Upon increasing the temperature, the dynamic compressive strength and elastic modulus of G-HPC were deteriorated especially in the temperature range between 250 °C and 750 °C, thereby leading to partial loss of its ability to resist impact loads. However, even after being heated to 1000 °C, the specimens still demonstrated a significant strain rate effect. Besides, the high cooling rate under water was observed to induce a thermal shock, resulting in the secondary damage for the heated specimens.
dc.language	English
dc.publisher	ELSEVIER SCIENCE INC
dc.relation	National Natural Science Foundation of China51978186
dc.relation.ispartof	Structures
dc.relation.isbasedon	10.1016/j.istruc.2022.11.097
dc.rights	info:eu-repo/semantics/closedAccess
dc.subject	0905 Civil Engineering, 1202 Building
dc.title	Experimental investigation of heating–cooling effects on the mechanical properties of geopolymer-based high performance concrete heated to elevated temperatures
dc.type	Journal Article
utslib.citation.volume	47
utslib.for	0905 Civil Engineering
utslib.for	1202 Building
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	closed_access	*
dc.date.updated	2023-03-26T21:37:38Z
pubs.publication-status	Published
pubs.volume	47

Abstract:

In this study, geopolymer-based high performance concrete (G-HPC) reinforced with steel fibres was utilized to investigate its dynamic behaviour after heating–cooling treatment. A furnace with a heating capacity of 1100 °C was adopted to heat the specimens. The P-wave velocity and quasi-static uniaxial compressive strength of G-HPC after the heating–cooling treatment were obtained and compared with those without the heating–cooling treatment. The experimental findings indicated that the G-HPC specimens suffered different degrees of thermal damage under 250–1000 °C high temperature, while it still remained a good explosive spalling resistance. Moreover, the water cooling regime would cause more serious damage to the G-HPC specimens than the natural cooling. Further, a 50 mm-diameter Split Hopkinson Pressure Bar (SHPB) apparatus was applied to characterize the dynamic behaviour of G-HPC after the heating–cooling treatment, and a high-speed camera was employed to record the failure process. Upon increasing the temperature, the dynamic compressive strength and elastic modulus of G-HPC were deteriorated especially in the temperature range between 250 °C and 750 °C, thereby leading to partial loss of its ability to resist impact loads. However, even after being heated to 1000 °C, the specimens still demonstrated a significant strain rate effect. Besides, the high cooling rate under water was observed to induce a thermal shock, resulting in the secondary damage for the heated specimens.

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http://hdl.handle.net/10453/168421