Mitigation of ASR using aggregate fines as an alternative for SCMs

Nsiah-Baafi, E; Tapas, MJ; Vessalas, K; Thomas, P; Sirivivatnanon, V

Mitigation of ASR using aggregate fines as an alternative for SCMs

Nsiah-Baafi, E Tapas, MJ Vessalas, K Thomas, P

Sirivivatnanon, V

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Publisher:: LABORATÓRIO NACIONAL DE ENGENHARIA CIVIL, I. P.
Publication Type:: Conference Proceeding
Citation:: Proceedings of the 16th International Conference on Alkali-Aggregate Reaction in Concrete, 2021, 1, pp. 423-431
Issue Date:: 2021-01-01

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Field	Value	Language
dc.contributor.author	Nsiah-Baafi, E
dc.contributor.author	Tapas, MJ
dc.contributor.author	Vessalas, K
dc.contributor.author	Thomas, P https://orcid.org/0000-0001-6962-2121
dc.contributor.author	Sirivivatnanon, V
dc.contributor.editor	Lopes Batista, A
dc.contributor.editor	Santos Silva, A
dc.contributor.editor	Fernandes, I
dc.contributor.editor	Oliveira Santos, L
dc.contributor.editor	Custódio, J
dc.contributor.editor	Serra, C
dc.date	2022-05-31
dc.date.accessioned	2021-05-27T07:37:31Z
dc.date.available	2021-05-27T07:37:31Z
dc.date.issued	2021-01-01
dc.identifier.citation	Proceedings of the 16th International Conference on Alkali-Aggregate Reaction in Concrete, 2021, 1, pp. 423-431
dc.identifier.isbn	9789724923154
dc.identifier.uri	http://hdl.handle.net/10453/149273
dc.description.abstract	The use of supplementary cementitious materials (SCMs) for mitigating alkali-silica reaction (ASR) is the most common and practical approach adopted by concrete producers since the early 1950s [1]. However, with the future supply of commonly available SCMs such as fly ash and ground granulated blast furnace slag set to decline, alternative materials for mitigating ASR needs to be considered. The objective of this experimental work is to investigate the potential of using ground reactive aggregate fines as SCM substitutes to mitigate ASR. The mechanism of mitigation has been investigated using characterization and expansion tests assessed under AMBT conditions. Mortar bars containing 0%, 10%, 25% and 40% ground reactive aggregate fines by mass of cement replacement were prepared for modified accelerated mortar bar testing. The results obtained indicated that a reduction in ASR expansion was achieved with increasing ground reactive aggregate fines content. Further characterization including XRF and ICP-OES analyses were carried out on ground reactive aggregate fines to understand the efficacy of these materials as potential additives for ASR mitigation.
dc.language	en
dc.publisher	LABORATÓRIO NACIONAL DE ENGENHARIA CIVIL, I. P.
dc.relation	http://purl.org/au-research/grants/arc/IH150100006
dc.relation.ispartof	Proceedings of the 16th International Conference on Alkali-Aggregate Reaction in Concrete
dc.relation.ispartof	16th International Conference on Alkali-Aggregate Reaction in Concrete
dc.rights	info:eu-repo/semantics/embargoedAccess
dc.title	Mitigation of ASR using aggregate fines as an alternative for SCMs
dc.type	Conference Proceeding
utslib.citation.volume	1
utslib.location.activity	Lisbon
pubs.organisational-group	/University of Technology Sydney
pubs.organisational-group	/University of Technology Sydney/Faculty of Science
pubs.organisational-group	/University of Technology Sydney/Strength - CBI - Centre for Built Infrastructure
pubs.organisational-group	/University of Technology Sydney/Faculty of Science/School of Mathematical and Physical Sciences
utslib.copyright.status	open_access	*
pubs.consider-herdc	false
utslib.copyright.embargo	2022-06-03T00:00:00+1000Z
dc.date.updated	2021-05-27T07:37:30Z
pubs.finish-date	2022-06-02
pubs.place-of-publication	Lisbon
pubs.publication-status	Published
pubs.start-date	2022-05-31
pubs.volume	1
dc.location	Lisbon

Abstract:

The use of supplementary cementitious materials (SCMs) for mitigating alkali-silica reaction (ASR) is the most common and practical approach adopted by concrete producers since the early 1950s [1]. However, with the future supply of commonly available SCMs such as fly ash and ground granulated blast furnace slag set to decline, alternative materials for mitigating ASR needs to be considered. The objective of this experimental work is to investigate the potential of using ground reactive aggregate fines as SCM substitutes to mitigate ASR. The mechanism of mitigation has been investigated using characterization and expansion tests assessed under AMBT conditions. Mortar bars containing 0%, 10%, 25% and 40% ground reactive aggregate fines by mass of cement replacement were prepared for modified accelerated mortar bar testing. The results obtained indicated that a reduction in ASR expansion was achieved with increasing ground reactive aggregate fines content. Further characterization including XRF and ICP-OES analyses were carried out on ground reactive aggregate fines to understand the efficacy of these materials as potential additives for ASR mitigation.

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http://hdl.handle.net/10453/149273