Susceptibility of Heat-Cured Concrete to Deleterious DEF; the Role of Alkali, Sulfate, and Temperature

Field	Value	Language
dc.contributor.author	Martin, L
dc.contributor.author	Thomas, P https://orcid.org/0000-0001-6962-2121
dc.contributor.author	De Silva, P
dc.contributor.author	Sirivivatnanon, V
dc.date	2022-11-03
dc.date.accessioned	2022-11-03T07:11:10Z
dc.date.available	2022-07-01
dc.date.available	2022-11-03T07:11:10Z
dc.date.issued	2022-09-03
dc.identifier.citation	2022
dc.identifier.uri	http://hdl.handle.net/10453/163208
dc.description.abstract	Durability of concrete materials is important for their global use in infrastructure. One potential cause of durability loss is delayed ettringite formation (DEF), a form of internal sulfate attack. DEF can lead to deleterious expansion, microcracking, and strength loss in affected elements and is of most concern in precast concrete, with major factors including pore solution alkalinity, elevated curing temperatures, and sulfate and aluminate binder contents. The role of chemical factors and heat in deleterious DEF has been investigated in this study with concrete prisms and hydrated cement paste samples via linear expansion and phase development. Results show that a combination of sustained heat and elevated alkali and sulfate contents are necessary for deleterious DEF to occur.
dc.language	en
dc.relation	http://purl.org/au-research/grants/arc/IH150100006
dc.relation.ispartof	76th RILEM Annual Week 2022 and International Conference on Regeneration and Conservation of Structures
dc.rights	info:eu-repo/semantics/openAccess
dc.title	Susceptibility of Heat-Cured Concrete to Deleterious DEF; the Role of Alkali, Sulfate, and Temperature
dc.type	Conference Proceeding
utslib.location.activity	Kyoto, Japan
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	open_access	*
pubs.consider-herdc	false
dc.date.updated	2022-11-03T07:11:09Z
pubs.finish-date	2022-11-09
pubs.publication-status	Published
pubs.start-date	2022-11-03

Abstract:

Durability of concrete materials is important for their global use in infrastructure. One potential cause of durability loss is delayed ettringite formation (DEF), a form of internal sulfate attack. DEF can lead to deleterious expansion, microcracking, and strength loss in affected elements and is of most concern in precast concrete, with major factors including pore solution alkalinity, elevated curing temperatures, and sulfate and aluminate binder contents. The role of chemical factors and heat in deleterious DEF has been investigated in this study with concrete prisms and hydrated cement paste samples via linear expansion and phase development. Results show that a combination of sustained heat and elevated alkali and sulfate contents are necessary for deleterious DEF to occur.

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http://hdl.handle.net/10453/163208