Effect of ground rice husk ash on engineering properties and hydration products of SRC eco-cement

Bui, PT; Ngo, T; Huynh, TP

Effect of ground rice husk ash on engineering properties and hydration products of SRC eco-cement

Bui, PT Ngo, T Huynh, TP

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Publisher:: WILEY
Publication Type:: Journal Article
Citation:: Environmental Progress and Sustainable Energy, 2022, 41, (2)
Issue Date:: 2022-03-01

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Field	Value	Language
dc.contributor.author	Bui, PT
dc.contributor.author	Ngo, T
dc.contributor.author	Huynh, TP
dc.date.accessioned	2023-06-30T21:13:44Z
dc.date.available	2023-06-30T21:13:44Z
dc.date.issued	2022-03-01
dc.identifier.citation	Environmental Progress and Sustainable Energy, 2022, 41, (2)
dc.identifier.issn	1944-7442
dc.identifier.issn	1944-7450
dc.identifier.uri	http://hdl.handle.net/10453/171052
dc.description.abstract	The effect of ground rice husk ash (GRHA) (R) on engineering properties and hydration products of eco-cements containing ground granulated blast furnace slag (GGBFS) (S) and circulating fluidized bed combustion ash (CFA) (C) was studied. Four mixture proportions of SRC eco-cements with GRHA replacement at levels of 0%, 15%, 30%, and 45% by mass of binder were investigated. A reference mixture proportion of paste with 100% ordinary Portland cement (OPC) was prepared for comparison purposes. A series of laboratory tests including setting time, compressive strength, water absorption, porosity, thermal conductivity, scanning electron microscope coupled with energy dispersive spectroscopy, X-ray diffraction, and Fourier-transform infrared spectroscopy analysis was carried out. Measured results showed that the GRHA increased setting time and porosity in the SRC eco-cements having a water-to-powder (w/p) of 0.4, leading to the decrease in compressive strength and thermal conductivity while the increase in water absorption. The GRHA increased the cristobalite amount and decreased the portlandite amount in the SRC eco-cements at the age of 28 days, resulting in the more significant long-term compressive strength development when compared with the reference paste with 100% OPC. Consequently, the GRHA could be used at a level of 15% by mass of binder to produce the SRC eco-cement with the compressive strength at 28 days of higher than 30 MPa and the thermal conductivity of 0.713 W/mK, resulting from the formations of AFt, C–S–H, and C–A–S–H gels.
dc.language	English
dc.publisher	WILEY
dc.relation.ispartof	Environmental Progress and Sustainable Energy
dc.relation.isbasedon	10.1002/ep.13748
dc.rights	info:eu-repo/semantics/closedAccess
dc.subject	03 Chemical Sciences, 06 Biological Sciences
dc.subject.classification	Environmental Sciences
dc.title	Effect of ground rice husk ash on engineering properties and hydration products of SRC eco-cement
dc.type	Journal Article
utslib.citation.volume	41
utslib.for	03 Chemical Sciences
utslib.for	06 Biological Sciences
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	2023-06-30T21:13:41Z
pubs.issue	2
pubs.publication-status	Published
pubs.volume	41
utslib.citation.issue	2

Abstract:

The effect of ground rice husk ash (GRHA) (R) on engineering properties and hydration products of eco-cements containing ground granulated blast furnace slag (GGBFS) (S) and circulating fluidized bed combustion ash (CFA) (C) was studied. Four mixture proportions of SRC eco-cements with GRHA replacement at levels of 0%, 15%, 30%, and 45% by mass of binder were investigated. A reference mixture proportion of paste with 100% ordinary Portland cement (OPC) was prepared for comparison purposes. A series of laboratory tests including setting time, compressive strength, water absorption, porosity, thermal conductivity, scanning electron microscope coupled with energy dispersive spectroscopy, X-ray diffraction, and Fourier-transform infrared spectroscopy analysis was carried out. Measured results showed that the GRHA increased setting time and porosity in the SRC eco-cements having a water-to-powder (w/p) of 0.4, leading to the decrease in compressive strength and thermal conductivity while the increase in water absorption. The GRHA increased the cristobalite amount and decreased the portlandite amount in the SRC eco-cements at the age of 28 days, resulting in the more significant long-term compressive strength development when compared with the reference paste with 100% OPC. Consequently, the GRHA could be used at a level of 15% by mass of binder to produce the SRC eco-cement with the compressive strength at 28 days of higher than 30 MPa and the thermal conductivity of 0.713 W/mK, resulting from the formations of AFt, C–S–H, and C–A–S–H gels.

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http://hdl.handle.net/10453/171052