Deflection hardening behaviour of ductile fibre reinforced magnesium phosphate cement-based composite

Feng, H; Li, Z; Wang, W; Liu, G; Zhang, Z; Gao, D

Deflection hardening behaviour of ductile fibre reinforced magnesium phosphate cement-based composite

Feng, H Li, Z Wang, W

Liu, G Zhang, Z Gao, D

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Publisher:: Elsevier BV
Publication Type:: Journal Article
Citation:: Cement and Concrete Composites, 2021, 121, pp. 104079
Issue Date:: 2021-08-01

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Field	Value	Language
dc.contributor.author	Feng, H
dc.contributor.author	Li, Z
dc.contributor.author	Wang, W https://orcid.org/0000-0003-2782-8652
dc.contributor.author	Liu, G
dc.contributor.author	Zhang, Z
dc.contributor.author	Gao, D
dc.date.accessioned	2022-04-12T21:41:45Z
dc.date.available	2022-04-12T21:41:45Z
dc.date.issued	2021-08-01
dc.identifier.citation	Cement and Concrete Composites, 2021, 121, pp. 104079
dc.identifier.issn	0958-9465
dc.identifier.uri	http://hdl.handle.net/10453/156139
dc.description.abstract	This study aims to develop the ductile ﬁbre reinforced magnesium phosphate cement-based composite (DFRMC) to address the inherent brittleness of magnesium phosphate cement (MPC). An experimental program was conducted, in which the eﬀects of fly ash substitute (FA) content, PVA ﬁbre volume fraction (Vf), sand to binder mass ratio (S/B) and water to solid mass ratio (W/Solid) on the properties of DFRMC were investigated. The test results revealed that all DFRMCs, except for those with mix of FA content of 0%, 10% and W/B of 0.10, can exhibit deﬂection hardening behaviour accompanied by multiple fine cracks under bending. The new indexes, flexural strength gap (fg), deflection gap (Dg), and toughness gap (Tg) were introduced in this study to accurately evaluate the deflection hardening capacity. The developed DFRMC with FA content of 20%, Vf of 1.6%, S/B of 0.2 and W/Solid of 0.13 showed the superior deflection hardening capacity as compared to other DFRMCs. Meanwhile, a moderate compressive strength of about 40 MPa, nominal flexural strength of 7.60 MPa and a relatively high slump value (over 250 mm) can be achieved. Furthermore, the denser MPC matrix and rough PVA fibre surface of DFRMC were investigated by using the scanning electron microscope (SEM) method.
dc.language	en
dc.publisher	Elsevier BV
dc.relation.ispartof	Cement and Concrete Composites
dc.relation.isbasedon	10.1016/j.cemconcomp.2021.104079
dc.rights	info:eu-repo/semantics/closedAccess
dc.subject	0904 Chemical Engineering, 0905 Civil Engineering, 1202 Building
dc.subject.classification	Building & Construction
dc.title	Deflection hardening behaviour of ductile fibre reinforced magnesium phosphate cement-based composite
dc.type	Journal Article
utslib.citation.volume	121
utslib.for	0904 Chemical Engineering
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
utslib.copyright.status	closed_access	*
dc.date.updated	2022-04-12T21:41:37Z
pubs.publication-status	Published
pubs.volume	121

Abstract:

This study aims to develop the ductile ﬁbre reinforced magnesium phosphate cement-based composite (DFRMC) to address the inherent brittleness of magnesium phosphate cement (MPC). An experimental program was conducted, in which the eﬀects of fly ash substitute (FA) content, PVA ﬁbre volume fraction (Vf), sand to binder mass ratio (S/B) and water to solid mass ratio (W/Solid) on the properties of DFRMC were investigated. The test results revealed that all DFRMCs, except for those with mix of FA content of 0%, 10% and W/B of 0.10, can exhibit deﬂection hardening behaviour accompanied by multiple fine cracks under bending. The new indexes, flexural strength gap (fg), deflection gap (Dg), and toughness gap (Tg) were introduced in this study to accurately evaluate the deflection hardening capacity. The developed DFRMC with FA content of 20%, Vf of 1.6%, S/B of 0.2 and W/Solid of 0.13 showed the superior deflection hardening capacity as compared to other DFRMCs. Meanwhile, a moderate compressive strength of about 40 MPa, nominal flexural strength of 7.60 MPa and a relatively high slump value (over 250 mm) can be achieved. Furthermore, the denser MPC matrix and rough PVA fibre surface of DFRMC were investigated by using the scanning electron microscope (SEM) method.

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http://hdl.handle.net/10453/156139