Impact behaviors of recycled aggregate concrete with nanoparticles

Li, W; Luo, Z; Xiao, J; Shah, SP

Impact behaviors of recycled aggregate concrete with nanoparticles

Li, W

Luo, Z Xiao, J Shah, SP

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Publication Type:: Conference Proceeding
Citation:: FIB 2018 - Proceedings for the 2018 fib Congress: Better, Smarter, Stronger, 2019, pp. 3984-3992
Issue Date:: 2019-01-01

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Field	Value	Language
dc.contributor.author	Li, W https://orcid.org/0000-0002-4651-1215
dc.contributor.author	Luo, Z
dc.contributor.author	Xiao, J
dc.contributor.author	Shah, SP
dc.date.accessioned	2020-06-21T23:57:30Z
dc.date.available	2020-06-21T23:57:30Z
dc.date.issued	2019-01-01
dc.identifier.citation	FIB 2018 - Proceedings for the 2018 fib Congress: Better, Smarter, Stronger, 2019, pp. 3984-3992
dc.identifier.uri	http://hdl.handle.net/10453/141613
dc.description.abstract	© 2019 by the fib. All rights reserved. A 100 mm-diameter split Hopkinson pressure bar (SHPB) was used to investigate effects of nanoparticles on the dynamic mechanical properties of recycled aggregate concrete (RAC) under impact loading. The nano-SiO2 (NS) and nano-CaCO3 (NC) were incorporated to replace cement by mass of 1 and 2% in RACs. The impact velocities were set as 7.7, 9.8 and 11.6 m/s in the SHPB tests. The effects of nanoparticles on failure patterns, compressive strengths, elastic modulus, peak strain and dynamic increase factor (DIF) of RACs under different strain rates were analyzed and discussed. The results show that nanomodified RACs exhibit higher both quasi-static and dynamic compressive strengths compared to control RAC. Dynamic elastic modulus of RAC seems not to be affected by nanoparticles dosages and impact velocities. Compared to NC, NS is more effective in improving dynamic compressive strengths of RAC.
dc.language	en
dc.relation.ispartof	FIB 2018 - Proceedings for the 2018 fib Congress: Better, Smarter, Stronger
dc.rights	info:eu-repo/semantics/restrictedAccess
dc.title	Impact behaviors of recycled aggregate concrete with nanoparticles
dc.type	Conference Proceeding
pubs.organisational-group	/University of Technology Sydney/Faculty of Engineering and Information Technology
pubs.organisational-group	/University of Technology Sydney/Strength - CBI - Centre for Built Infrastructure
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	2020-06-21T23:57:27Z
pubs.publication-status	Published

Abstract:

© 2019 by the fib. All rights reserved. A 100 mm-diameter split Hopkinson pressure bar (SHPB) was used to investigate effects of nanoparticles on the dynamic mechanical properties of recycled aggregate concrete (RAC) under impact loading. The nano-SiO2 (NS) and nano-CaCO3 (NC) were incorporated to replace cement by mass of 1 and 2% in RACs. The impact velocities were set as 7.7, 9.8 and 11.6 m/s in the SHPB tests. The effects of nanoparticles on failure patterns, compressive strengths, elastic modulus, peak strain and dynamic increase factor (DIF) of RACs under different strain rates were analyzed and discussed. The results show that nanomodified RACs exhibit higher both quasi-static and dynamic compressive strengths compared to control RAC. Dynamic elastic modulus of RAC seems not to be affected by nanoparticles dosages and impact velocities. Compared to NC, NS is more effective in improving dynamic compressive strengths of RAC.

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http://hdl.handle.net/10453/141613