Effects of nanoparticle on the dynamic behaviors of recycled aggregate concrete under impact loading

Li, W; Luo, Z; Long, C; Wu, C; Duan, WH; Shah, SP

Effects of nanoparticle on the dynamic behaviors of recycled aggregate concrete under impact loading

Li, W

Luo, Z Long, C Wu, C

Duan, WH Shah, SP

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Publisher:: ELSEVIER SCI LTD
Publication Type:: Journal Article
Citation:: Materials and Design, 2016, 112, pp. 58-66
Issue Date:: 2016-12-15

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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	Long, C
dc.contributor.author	Wu, C https://orcid.org/0000-0001-6786-7934
dc.contributor.author	Duan, WH
dc.contributor.author	Shah, SP
dc.date.accessioned	2023-03-26T22:36:33Z
dc.date.available	2023-03-26T22:36:33Z
dc.date.issued	2016-12-15
dc.identifier.citation	Materials and Design, 2016, 112, pp. 58-66
dc.identifier.issn	0264-1275
dc.identifier.issn	1873-4197
dc.identifier.uri	http://hdl.handle.net/10453/168445
dc.description.abstract	A 100 mm-diameter split Hopkinson pressure bar (SHPB) was applied 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 be affected by nanoparticle dosages and impact velocities. Compared to NC, NS is more effective to improve dynamic compressive strengths of RAC. On the other hand, the nanoparticles modified RACs exhibit lower DIF values than that of the control RAC. Moreover, NC obviously more reduces the DIF values of nanomodified RAC than NS.
dc.language	English
dc.publisher	ELSEVIER SCI LTD
dc.relation	http://purl.org/au-research/grants/arc/DE150101751
dc.relation	National Natural Science Foundation of China51408210
dc.relation.ispartof	Materials and Design
dc.relation.isbasedon	10.1016/j.matdes.2016.09.045
dc.rights	info:eu-repo/semantics/closedAccess
dc.subject	0910 Manufacturing Engineering, 0912 Materials Engineering, 0913 Mechanical Engineering
dc.subject.classification	Materials
dc.title	Effects of nanoparticle on the dynamic behaviors of recycled aggregate concrete under impact loading
dc.type	Journal Article
utslib.citation.volume	112
utslib.for	0912 Materials Engineering
utslib.for	0913 Mechanical Engineering
utslib.for	0910 Manufacturing Engineering
utslib.for	0912 Materials Engineering
utslib.for	0913 Mechanical Engineering
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	2023-03-26T22:36:32Z
pubs.publication-status	Published
pubs.volume	112

Abstract:

A 100 mm-diameter split Hopkinson pressure bar (SHPB) was applied 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 be affected by nanoparticle dosages and impact velocities. Compared to NC, NS is more effective to improve dynamic compressive strengths of RAC. On the other hand, the nanoparticles modified RACs exhibit lower DIF values than that of the control RAC. Moreover, NC obviously more reduces the DIF values of nanomodified RAC than NS.

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http://hdl.handle.net/10453/168445