Sulfate Resistance of Blended Cements (Limestone Illite Calcined Clay) Exposed Without Previous Curing
- Autores
- Rossetti, Agustín; Ikumi, Tai; Segura, Ignacio; Irassar, Edgardo Fabián
- Año de publicación
- 2020
- Idioma
- inglés
- Tipo de recurso
- documento de conferencia
- Estado
- versión publicada
- Descripción
- Durability in aggressive environments is an important factor to extend the service life of concrete and the use ternary blended cements (limestone filler + calcined clays) can contribute to this purpose. In sulfate environments, the effects of supplementary cementing materials depend on the concentration, Portland cement and the progress of hydration reactions. Low level of limestone filler replacement influences the stabilization of AFt due to formation of monocarboaluminate, but high replacement increases the effective w/c and the capillary porosity promoting sulfate penetration. The use of active pozzolans suppresses the sulfate attack by minimizing both ettringite and gypsum formation. It is generally assumed that curing prior to sulfate exposure should be extended to allow the development of the pozzolanic reaction and subsequent reduction of portlandite content, pore size structure refinement and permeability reduction. However, in most field applications, concretes exposed to sulfate attack are cast in situ and thus, these are exposed to sulfate since early ages. This paper evaluates the sulfate resistance of an illitic-calcined clay and limestone filler when the cement is exposed immediately to aggressive environments. In this paper, the external sulfate resistance of blended cements containing 30% replacement of limestone filler and/or calcined clay (C30F, C30CC and C15F15CC) are analysed. Two different calcined clays from Buenos Aires, Argentina were selected. Mortar prisms and cement paste cubes were fabricated and exposed to a sodium sulfate solution after 2 days. Comparison of sulfate resistance was based on the expansion, mass variation, visual appearance and compressive strength . Furthermore, the evolution of microstructure of blended cements exposed to sodium sulfate solution was characterized by XRD tests on the external surface and the core of cement-blended pastes.
Publicado en: Current Topics and Trends on Durability of Building Materials and Components, Serrat, C., Casas, J.R. and Gibert, V. (Eds). - Materia
-
Ingeniería de los Materiales
Illite Calcined Clay
Limestone Filler
Sulfate Attack
Curing
Early Exposure - Nivel de accesibilidad
- acceso abierto
- Condiciones de uso
- http://creativecommons.org/licenses/by-nc-sa/4.0/
- Repositorio
- Institución
- Comisión de Investigaciones Científicas de la Provincia de Buenos Aires
- OAI Identificador
- oai:digital.cic.gba.gob.ar:11746/10901
Ver los metadatos del registro completo
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Sulfate Resistance of Blended Cements (Limestone Illite Calcined Clay) Exposed Without Previous CuringRossetti, AgustínIkumi, TaiSegura, IgnacioIrassar, Edgardo FabiánIngeniería de los MaterialesIllite Calcined ClayLimestone FillerSulfate AttackCuringEarly ExposureDurability in aggressive environments is an important factor to extend the service life of concrete and the use ternary blended cements (limestone filler + calcined clays) can contribute to this purpose. In sulfate environments, the effects of supplementary cementing materials depend on the concentration, Portland cement and the progress of hydration reactions. Low level of limestone filler replacement influences the stabilization of AFt due to formation of monocarboaluminate, but high replacement increases the effective w/c and the capillary porosity promoting sulfate penetration. The use of active pozzolans suppresses the sulfate attack by minimizing both ettringite and gypsum formation. It is generally assumed that curing prior to sulfate exposure should be extended to allow the development of the pozzolanic reaction and subsequent reduction of portlandite content, pore size structure refinement and permeability reduction. However, in most field applications, concretes exposed to sulfate attack are cast in situ and thus, these are exposed to sulfate since early ages. This paper evaluates the sulfate resistance of an illitic-calcined clay and limestone filler when the cement is exposed immediately to aggressive environments. In this paper, the external sulfate resistance of blended cements containing 30% replacement of limestone filler and/or calcined clay (C30F, C30CC and C15F15CC) are analysed. Two different calcined clays from Buenos Aires, Argentina were selected. Mortar prisms and cement paste cubes were fabricated and exposed to a sodium sulfate solution after 2 days. Comparison of sulfate resistance was based on the expansion, mass variation, visual appearance and compressive strength . Furthermore, the evolution of microstructure of blended cements exposed to sodium sulfate solution was characterized by XRD tests on the external surface and the core of cement-blended pastes.Publicado en: Current Topics and Trends on Durability of Building Materials and Components, Serrat, C., Casas, J.R. and Gibert, V. (Eds).2020info:eu-repo/semantics/conferenceObjectinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_5794info:ar-repo/semantics/documentoDeConferenciaapplication/pdfhttps://digital.cic.gba.gob.ar/handle/11746/10901enginfo:eu-repo/semantics/altIdentifier/doi/10.23967/dbmc.2020.224info:eu-repo/semantics/openAccesshttp://creativecommons.org/licenses/by-nc-sa/4.0/reponame:CIC Digital (CICBA)instname:Comisión de Investigaciones Científicas de la Provincia de Buenos Airesinstacron:CICBA2025-09-29T13:40:07Zoai:digital.cic.gba.gob.ar:11746/10901Institucionalhttp://digital.cic.gba.gob.arOrganismo científico-tecnológicoNo correspondehttp://digital.cic.gba.gob.ar/oai/snrdmarisa.degiusti@sedici.unlp.edu.arArgentinaNo correspondeNo correspondeNo correspondeopendoar:94412025-09-29 13:40:07.999CIC Digital (CICBA) - Comisión de Investigaciones Científicas de la Provincia de Buenos Airesfalse |
dc.title.none.fl_str_mv |
Sulfate Resistance of Blended Cements (Limestone Illite Calcined Clay) Exposed Without Previous Curing |
title |
Sulfate Resistance of Blended Cements (Limestone Illite Calcined Clay) Exposed Without Previous Curing |
spellingShingle |
Sulfate Resistance of Blended Cements (Limestone Illite Calcined Clay) Exposed Without Previous Curing Rossetti, Agustín Ingeniería de los Materiales Illite Calcined Clay Limestone Filler Sulfate Attack Curing Early Exposure |
title_short |
Sulfate Resistance of Blended Cements (Limestone Illite Calcined Clay) Exposed Without Previous Curing |
title_full |
Sulfate Resistance of Blended Cements (Limestone Illite Calcined Clay) Exposed Without Previous Curing |
title_fullStr |
Sulfate Resistance of Blended Cements (Limestone Illite Calcined Clay) Exposed Without Previous Curing |
title_full_unstemmed |
Sulfate Resistance of Blended Cements (Limestone Illite Calcined Clay) Exposed Without Previous Curing |
title_sort |
Sulfate Resistance of Blended Cements (Limestone Illite Calcined Clay) Exposed Without Previous Curing |
dc.creator.none.fl_str_mv |
Rossetti, Agustín Ikumi, Tai Segura, Ignacio Irassar, Edgardo Fabián |
author |
Rossetti, Agustín |
author_facet |
Rossetti, Agustín Ikumi, Tai Segura, Ignacio Irassar, Edgardo Fabián |
author_role |
author |
author2 |
Ikumi, Tai Segura, Ignacio Irassar, Edgardo Fabián |
author2_role |
author author author |
dc.subject.none.fl_str_mv |
Ingeniería de los Materiales Illite Calcined Clay Limestone Filler Sulfate Attack Curing Early Exposure |
topic |
Ingeniería de los Materiales Illite Calcined Clay Limestone Filler Sulfate Attack Curing Early Exposure |
dc.description.none.fl_txt_mv |
Durability in aggressive environments is an important factor to extend the service life of concrete and the use ternary blended cements (limestone filler + calcined clays) can contribute to this purpose. In sulfate environments, the effects of supplementary cementing materials depend on the concentration, Portland cement and the progress of hydration reactions. Low level of limestone filler replacement influences the stabilization of AFt due to formation of monocarboaluminate, but high replacement increases the effective w/c and the capillary porosity promoting sulfate penetration. The use of active pozzolans suppresses the sulfate attack by minimizing both ettringite and gypsum formation. It is generally assumed that curing prior to sulfate exposure should be extended to allow the development of the pozzolanic reaction and subsequent reduction of portlandite content, pore size structure refinement and permeability reduction. However, in most field applications, concretes exposed to sulfate attack are cast in situ and thus, these are exposed to sulfate since early ages. This paper evaluates the sulfate resistance of an illitic-calcined clay and limestone filler when the cement is exposed immediately to aggressive environments. In this paper, the external sulfate resistance of blended cements containing 30% replacement of limestone filler and/or calcined clay (C30F, C30CC and C15F15CC) are analysed. Two different calcined clays from Buenos Aires, Argentina were selected. Mortar prisms and cement paste cubes were fabricated and exposed to a sodium sulfate solution after 2 days. Comparison of sulfate resistance was based on the expansion, mass variation, visual appearance and compressive strength . Furthermore, the evolution of microstructure of blended cements exposed to sodium sulfate solution was characterized by XRD tests on the external surface and the core of cement-blended pastes. Publicado en: Current Topics and Trends on Durability of Building Materials and Components, Serrat, C., Casas, J.R. and Gibert, V. (Eds). |
description |
Durability in aggressive environments is an important factor to extend the service life of concrete and the use ternary blended cements (limestone filler + calcined clays) can contribute to this purpose. In sulfate environments, the effects of supplementary cementing materials depend on the concentration, Portland cement and the progress of hydration reactions. Low level of limestone filler replacement influences the stabilization of AFt due to formation of monocarboaluminate, but high replacement increases the effective w/c and the capillary porosity promoting sulfate penetration. The use of active pozzolans suppresses the sulfate attack by minimizing both ettringite and gypsum formation. It is generally assumed that curing prior to sulfate exposure should be extended to allow the development of the pozzolanic reaction and subsequent reduction of portlandite content, pore size structure refinement and permeability reduction. However, in most field applications, concretes exposed to sulfate attack are cast in situ and thus, these are exposed to sulfate since early ages. This paper evaluates the sulfate resistance of an illitic-calcined clay and limestone filler when the cement is exposed immediately to aggressive environments. In this paper, the external sulfate resistance of blended cements containing 30% replacement of limestone filler and/or calcined clay (C30F, C30CC and C15F15CC) are analysed. Two different calcined clays from Buenos Aires, Argentina were selected. Mortar prisms and cement paste cubes were fabricated and exposed to a sodium sulfate solution after 2 days. Comparison of sulfate resistance was based on the expansion, mass variation, visual appearance and compressive strength . Furthermore, the evolution of microstructure of blended cements exposed to sodium sulfate solution was characterized by XRD tests on the external surface and the core of cement-blended pastes. |
publishDate |
2020 |
dc.date.none.fl_str_mv |
2020 |
dc.type.none.fl_str_mv |
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conferenceObject |
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publishedVersion |
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https://digital.cic.gba.gob.ar/handle/11746/10901 |
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eng |
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eng |
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info:eu-repo/semantics/altIdentifier/doi/10.23967/dbmc.2020.224 |
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