Alkali Immersion effects on alkali silica reaction progress in an Australian aggregate concrete

Field	Value	Language
dc.contributor.author	Boyd-Weetman, B
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	2022-09-03
dc.date.accessioned	2022-11-03T06:55:12Z
dc.date.available	2022-07-01
dc.date.available	2022-11-03T06:55:12Z
dc.date.issued	2022-09-03
dc.identifier.citation	2022
dc.identifier.uri	http://hdl.handle.net/10453/163206
dc.description.abstract	The Alkali Silica Reaction is a deleterious reaction between alkalis and reactive aggregate materials in concrete structures. ASR has caused significant damage and reduces service life of structures. The mechanism for ASR developed deterioration has been a subject of study for almost a century continuing to the modern day. To prevent ASR from affecting the service life of current and future structures, characterisation of concrete material’s propensity to form ASR is vital to inform material choice for durable concrete. Accelerated testing methods for identifying aggregate propensity towards deleterious ASR have been developed and improved upon since the reaction’s discovery. Minimising alkali is important in protecting the long-term durability of structures however boosting alkali of concrete in controlled experimental conditions is required to asses an aggregates propensity for ASR reactivity. Accelerating ASR reactive conditions via alkaline solution immersion techniques are emerging as a viable ASR investigative tool. This study investigates the effect of boosted alkali binders and immersion solutions on the ASR mechanism. Concrete prism specimens of a range of alkali loadings with a specific aggregate are immersed in alkaline solution approximating their internal pore solution. The effect on deleterious expansion, aggregate damage and ASR mechanisms are assessed.
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	Alkali Immersion effects on alkali silica reaction progress in an Australian aggregate concrete
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	2022-11-03T06:55:10Z
pubs.finish-date	2022-09-09
pubs.publication-status	Published
pubs.start-date	2022-09-03

Abstract:

The Alkali Silica Reaction is a deleterious reaction between alkalis and reactive aggregate materials in concrete structures. ASR has caused significant damage and reduces service life of structures. The mechanism for ASR developed deterioration has been a subject of study for almost a century continuing to the modern day. To prevent ASR from affecting the service life of current and future structures, characterisation of concrete material’s propensity to form ASR is vital to inform material choice for durable concrete. Accelerated testing methods for identifying aggregate propensity towards deleterious ASR have been developed and improved upon since the reaction’s discovery. Minimising alkali is important in protecting the long-term durability of structures however boosting alkali of concrete in controlled experimental conditions is required to asses an aggregates propensity for ASR reactivity. Accelerating ASR reactive conditions via alkaline solution immersion techniques are emerging as a viable ASR investigative tool. This study investigates the effect of boosted alkali binders and immersion solutions on the ASR mechanism. Concrete prism specimens of a range of alkali loadings with a specific aggregate are immersed in alkaline solution approximating their internal pore solution. The effect on deleterious expansion, aggregate damage and ASR mechanisms are assessed.

Please use this identifier to cite or link to this item:

http://hdl.handle.net/10453/163206