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A Review on Alkali-Silica Reaction Evolution in Recycled Aggregate Concrete

2020-06-09Journal article Open access
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datacite.subject.fosCiências Naturais::Ciências Físicas
datacite.subject.fosCiências Naturais::Outras Ciências Naturais
dc.contributor.authorSantos, Miguel Barreto
dc.contributor.authorBrito, Jorge de
dc.contributor.authorSilva, António Santos
dc.date.accessioned2025-09-15T16:53:47Z
dc.date.available2025-09-15T16:53:47Z
dc.date.issued2020-06-09
dc.descriptionThe authors gratefully acknowledge the support of CERIS, from IST-University of Lisbon, the Foundation for Science and Technology, and also National Laboratory for Civil Engineering-LNEC for their support through the project RE-IMPROVE (Expansive reactions in concrete-Prevention andmitigation of their effects).
dc.description.abstractAlkali-silica reaction (ASR) is one of the major degradation causes of concrete. This highly deleterious reaction has aroused the attention of researchers, in order to develop methodologies for its prevention and mitigation, but despite the efforts made, there is still no efficient cure to control its expansive consequences. The incorporation of recycled aggregates in concrete raises several ASR issues, mainly due to the difficult control of the source concrete reactivity level and the lack of knowledge on ASR's evolution in new recycled aggregate concrete. This paper reviews several research works on ASR in concrete with recycled aggregates, and the main findings are presented in order to contribute to the knowledge and discussion of ASR in recycled aggregate concrete. It has been observed that age, exposure conditions, crushing and the heterogeneity source can influence the alkalis and reactive silica contents in the recycled aggregates. The use of low contents of highly reactive recycled aggregates as a replacement for natural aggregates can be done without an increase in expansion of concrete. ASR expansion tests and ASR mitigation measures need to be further researched to incorporate a higher content of recycled aggregates.eng
dc.identifier.citationBarreto Santos, M., De Brito, J., & Santos Silva, A. (2020). A Review on Alkali-Silica Reaction Evolution in Recycled Aggregate Concrete. Materials, 13(11), 2625. https://doi.org/10.3390/ma13112625.
dc.identifier.doi10.3390/ma13112625
dc.identifier.eissn1996-1944
dc.identifier.urihttp://hdl.handle.net/10400.8/14070
dc.language.isoeng
dc.peerreviewedyes
dc.publisherMDPI
dc.relation.hasversionhttps://www.mdpi.com/1996-1944/13/11/2625
dc.relation.ispartofMaterials
dc.rights.urihttp://creativecommons.org/licenses/by/4.0/
dc.subjectalkali-silica reaction
dc.subjectrecycled aggregate
dc.subjectconcrete degradation
dc.subjecttest-methods
dc.subjectcharacterization
dc.titleA Review on Alkali-Silica Reaction Evolution in Recycled Aggregate Concreteeng
dc.typejournal article
dspace.entity.typePublication
oaire.citation.endPage20
oaire.citation.issue11
oaire.citation.startPage1
oaire.citation.titleMaterials
oaire.citation.volume13
oaire.versionhttp://purl.org/coar/version/c_970fb48d4fbd8a85
person.familyNameBarreto Santos
person.givenNameMiguel
person.identifier.orcid0000-0001-9296-6643
relation.isAuthorOfPublicationa172351f-a295-4886-8465-4fbc1f932db1
relation.isAuthorOfPublication.latestForDiscoverya172351f-a295-4886-8465-4fbc1f932db1

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Alkali-silica reaction (ASR) is one of the major degradation causes of concrete. This highly deleterious reaction has aroused the attention of researchers, in order to develop methodologies for its prevention and mitigation, but despite the efforts made, there is still no efficient cure to control its expansive consequences. The incorporation of recycled aggregates in concrete raises several ASR issues, mainly due to the difficult control of the source concrete reactivity level and the lack of knowledge on ASR's evolution in new recycled aggregate concrete. This paper reviews several research works on ASR in concrete with recycled aggregates, and the main findings are presented in order to contribute to the knowledge and discussion of ASR in recycled aggregate concrete. It has been observed that age, exposure conditions, crushing and the heterogeneity source can influence the alkalis and reactive silica contents in the recycled aggregates. The use of low contents of highly reactive recycled aggregates as a replacement for natural aggregates can be done without an increase in expansion of concrete. ASR expansion tests and ASR mitigation measures need to be further researched to incorporate a higher content of recycled aggregates.
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