A comparative study on mechanical properties and environmental impact of UHPC with belite cement and portland cement

Li, Y; Zeng, X; Shi, Y; Yang, K; Zhou, J; Umar, HA; Long, G; Xie, Y

A comparative study on mechanical properties and environmental impact of UHPC with belite cement and portland cement

Li, Y Zeng, X Shi, Y Yang, K Zhou, J

Umar, HA Long, G Xie, Y

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Publisher:: ELSEVIER SCI LTD
Publication Type:: Journal Article
Citation:: Journal of Cleaner Production, 2022, 380
Issue Date:: 2022-12-20

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Field	Value	Language
dc.contributor.author	Li, Y
dc.contributor.author	Zeng, X
dc.contributor.author	Shi, Y
dc.contributor.author	Yang, K
dc.contributor.author	Zhou, J https://orcid.org/0000-0003-1393-1608
dc.contributor.author	Umar, HA
dc.contributor.author	Long, G
dc.contributor.author	Xie, Y
dc.date.accessioned	2023-01-19T05:37:14Z
dc.date.available	2023-01-19T05:37:14Z
dc.date.issued	2022-12-20
dc.identifier.citation	Journal of Cleaner Production, 2022, 380
dc.identifier.issn	0959-6526
dc.identifier.issn	1879-1786
dc.identifier.uri	http://hdl.handle.net/10453/165241
dc.description.abstract	Developing an eco-friendly UHPC with Belite cement (BC) is a great challenge because the mechanical strength of concrete with BC develops much more slowly than Ordinary Portland cement (alite-rich cement, OPC). However, BC has a lower CO2 footprint than OPC due to a lower calcined temperature and less limestone demand, making it green cement. Besides, concrete with BC has better long-age performance. In this study, the utilization of BC in UHPC was compared to that of OPC. Three curing regimes were used for the designed UHPC. The compressive and flexural strengths of UHPC-BC are lower than of UHPC-OPC at one day but higher after 28 and 90 days of standard curing. After heat curing, the mechanical strength development of UHPC-BC improves noticeably and exceeds UHPC-OPC. UHPC-BC has a higher flexural strength to compressive strength ratio (ff/fcu), and there are more C–S–H, less CH and lower pore coarsening of UHPC-BC paste than UHPC-OPC, especially after heat curing. UHPC-BC has lower environmental impact indices at long age than UHPC-OPC. At 90 days of autoclaved curing, the compressive of UHPC-BC reaches up to 197.5 MPa with the embodied carbon content of 934.37 kg/m3, which is much lower than most UHPCs.
dc.language	English
dc.publisher	ELSEVIER SCI LTD
dc.relation.ispartof	Journal of Cleaner Production
dc.relation.isbasedon	10.1016/j.jclepro.2022.135003
dc.rights	info:eu-repo/semantics/embargoedAccess
dc.subject	0907 Environmental Engineering, 0910 Manufacturing Engineering, 0915 Interdisciplinary Engineering
dc.subject.classification	Environmental Sciences
dc.title	A comparative study on mechanical properties and environmental impact of UHPC with belite cement and portland cement
dc.type	Journal Article
utslib.citation.volume	380
utslib.for	0907 Environmental Engineering
utslib.for	0910 Manufacturing Engineering
utslib.for	0915 Interdisciplinary 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 - CTWW - Centre for Technology in Water and Wastewater Treatment
utslib.copyright.status	open_access	*
utslib.copyright.embargo	2024-12-01T00:00:00+1000Z
dc.date.updated	2023-01-19T05:37:12Z
pubs.publication-status	Published
pubs.volume	380

Abstract:

Developing an eco-friendly UHPC with Belite cement (BC) is a great challenge because the mechanical strength of concrete with BC develops much more slowly than Ordinary Portland cement (alite-rich cement, OPC). However, BC has a lower CO2 footprint than OPC due to a lower calcined temperature and less limestone demand, making it green cement. Besides, concrete with BC has better long-age performance. In this study, the utilization of BC in UHPC was compared to that of OPC. Three curing regimes were used for the designed UHPC. The compressive and flexural strengths of UHPC-BC are lower than of UHPC-OPC at one day but higher after 28 and 90 days of standard curing. After heat curing, the mechanical strength development of UHPC-BC improves noticeably and exceeds UHPC-OPC. UHPC-BC has a higher flexural strength to compressive strength ratio (ff/fcu), and there are more C–S–H, less CH and lower pore coarsening of UHPC-BC paste than UHPC-OPC, especially after heat curing. UHPC-BC has lower environmental impact indices at long age than UHPC-OPC. At 90 days of autoclaved curing, the compressive of UHPC-BC reaches up to 197.5 MPa with the embodied carbon content of 934.37 kg/m3, which is much lower than most UHPCs.

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http://hdl.handle.net/10453/165241