An experimental study of aggregate shape effect on dynamic compressive behaviours of cementitious mortar

Jiang, S; Shen, L; Li, W

An experimental study of aggregate shape effect on dynamic compressive behaviours of cementitious mortar

Jiang, S Shen, L Li, W

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Publisher:: ELSEVIER SCI LTD
Publication Type:: Journal Article
Citation:: Construction and Building Materials, 2021, 303
Issue Date:: 2021-10-11

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Field	Value	Language
dc.contributor.author	Jiang, S
dc.contributor.author	Shen, L
dc.contributor.author	Li, W https://orcid.org/0000-0002-4651-1215
dc.date.accessioned	2022-03-10T06:42:41Z
dc.date.available	2022-03-10T06:42:41Z
dc.date.issued	2021-10-11
dc.identifier.citation	Construction and Building Materials, 2021, 303
dc.identifier.issn	0950-0618
dc.identifier.issn	1879-0526
dc.identifier.uri	http://hdl.handle.net/10453/155134
dc.description.abstract	An experimental investigation is conducted to study the effect of aggregate shape on mortar dynamic failure behaviours. Split Hopkinson bar device is employed to compress cylindrical mortar samples containing irregular glass aggregates and rounded glass aggregates under high strain rates from 1000 s−1 to 2500 s−1. A new insight into the aggregate shape effect on the mortar cracking mechanisms is presented at the microscale using micro-CT. The cracking characteristics are found to be highly dependent on the aggregate shape, where more rounded aggregates in mortar are less likely to possess transgranular cracks after the initiation of intergranular cracks in the weak interfacial transition zone. These microscopic cracking mechanisms are validated by the cumulative distribution evolutions of particle size and morphological parameters (elongation and flatness), which are further manifested by the dynamic compressive strength. The results demonstrate that mortar with more regular aggregates exhibits higher dynamic compressive strength and strain rate sensitivity.
dc.language	English
dc.publisher	ELSEVIER SCI LTD
dc.relation.ispartof	Construction and Building Materials
dc.relation.isbasedon	10.1016/j.conbuildmat.2021.124443
dc.rights	info:eu-repo/semantics/closedAccess
dc.subject	0905 Civil Engineering, 1202 Building
dc.subject.classification	Building & Construction
dc.title	An experimental study of aggregate shape effect on dynamic compressive behaviours of cementitious mortar
dc.type	Journal Article
utslib.citation.volume	303
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	2022-03-10T06:42:29Z
pubs.publication-status	Published
pubs.volume	303

Abstract:

An experimental investigation is conducted to study the effect of aggregate shape on mortar dynamic failure behaviours. Split Hopkinson bar device is employed to compress cylindrical mortar samples containing irregular glass aggregates and rounded glass aggregates under high strain rates from 1000 s−1 to 2500 s−1. A new insight into the aggregate shape effect on the mortar cracking mechanisms is presented at the microscale using micro-CT. The cracking characteristics are found to be highly dependent on the aggregate shape, where more rounded aggregates in mortar are less likely to possess transgranular cracks after the initiation of intergranular cracks in the weak interfacial transition zone. These microscopic cracking mechanisms are validated by the cumulative distribution evolutions of particle size and morphological parameters (elongation and flatness), which are further manifested by the dynamic compressive strength. The results demonstrate that mortar with more regular aggregates exhibits higher dynamic compressive strength and strain rate sensitivity.

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http://hdl.handle.net/10453/155134