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dc.contributor.author
Milanesi, Carlos A.
dc.contributor.author
Marfil, Silvina Andrea
dc.contributor.author
Locati, Francisco
dc.date.available
2021-09-22T17:01:35Z
dc.date.issued
2020-12
dc.identifier.citation
Milanesi, Carlos A.; Marfil, Silvina Andrea; Locati, Francisco; Expansive behavior of an alkali-carbonate reactive dolostone from Argentina: Proposal of an osmotic theory-based model to explain the expansion caused by the alkali attack; Pergamon-Elsevier Science Ltd; Cement and Concrete Research; 138; 12-2020; 1-10; 106239
dc.identifier.issn
0008-8846
dc.identifier.uri
http://hdl.handle.net/11336/141204
dc.description.abstract
The expansion mechanism of dolomitic rocks in alkaline environments is complex and a current topic of debate, since two different chemical reactions can coexist: one linked with silica attack (alkali-silica reaction, ASR) and the other with dolomite attack (alkali-carbonate reaction, ACR). In previous works, a potentially reactive, fine-grained argillaceous dolomitic rock was identified in Argentina, with similar expansive characteristics to the typical American reactive carbonates. When this rock is used as aggregate in mortars or concretes, the dolomite experiences a clearly expansive dedolomitization reaction, which cannot be controlled by the classical techniques that allow the inhibition of ASR: supplementary cementitious materials (SCMs) (fly ash, natural pozzolan, silica fume, etc.) or Li-based admixtures. Since none of the classical theories proposed by the literature adequately describe the expansive behavior of this rock, an expansion mechanism based on the osmotic phenomenon is proposed in the present work. This mechanism describes the behavior of the Argentine dolostone more appropriately and allows explaining the effect of the main factors involved in the concrete expansion (pH of the pore solution, nature of the alkali cation associated with the OH−, role of water in the expansion, temperature, aggregate particle size, effect of the SCMs, etc.). The basis of the osmotic model is presented, and its advantages are discussed compared with the classical ACR mechanisms proposed by the literature.
dc.format
application/pdf
dc.language.iso
eng
dc.publisher
Pergamon-Elsevier Science Ltd
dc.rights
info:eu-repo/semantics/restrictedAccess
dc.rights.uri
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
dc.subject
ALKALI-CARBONATE REACTION
dc.subject
DEDOLOMITIZATION
dc.subject
DOLOSTONE
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EXPANSION MECHANISM
dc.subject
OSMOTIC MODEL
dc.subject.classification
Ingeniería de la Construcción
dc.subject.classification
Ingeniería Civil
dc.subject.classification
INGENIERÍAS Y TECNOLOGÍAS
dc.title
Expansive behavior of an alkali-carbonate reactive dolostone from Argentina: Proposal of an osmotic theory-based model to explain the expansion caused by the alkali attack
dc.type
info:eu-repo/semantics/article
dc.type
info:ar-repo/semantics/artículo
dc.type
info:eu-repo/semantics/publishedVersion
dc.date.updated
2021-09-06T15:11:14Z
dc.journal.volume
138
dc.journal.pagination
1-10; 106239
dc.journal.pais
Estados Unidos
dc.description.fil
Fil: Milanesi, Carlos A.. Cementos Avellaneda; Argentina
dc.description.fil
Fil: Marfil, Silvina Andrea. Universidad Nacional del Sur. Departamento de Geología; Argentina
dc.description.fil
Fil: Locati, Francisco. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Córdoba. Centro de Investigaciones en Ciencias de la Tierra. Universidad Nacional de Córdoba. Facultad de Ciencias Exactas Físicas y Naturales. Centro de Investigaciones en Ciencias de la Tierra; Argentina
dc.journal.title
Cement and Concrete Research
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/doi/http://dx.doi.org/10.1016/j.cemconres.2020.106239
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/url/https://www.sciencedirect.com/science/article/abs/pii/S0008884620303471
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