Durability of blended cements containing illitic calcined clays
- Autores
- Irassar, Edgardo Fabián; Cordoba, Gisela; Zito, Silvina; Rossetti, Agustín; Rahhal, Viviana; Falcone, Darío Daniel
- Año de publicación
- 2019
- Idioma
- inglés
- Tipo de recurso
- documento de conferencia
- Estado
- versión publicada
- Descripción
- Illitic clays have pozzolanic activity after thermal treatment at 950 ºC causing dehydroxilation and structure collapse to form metastable aluminosilicate associated with large proportion of iron oxides (~7.0%) and alkalis (~5.0%Na2Oeq). In this paper, the performance against sulfate attack, chloride penetration and alkali silica reaction of different blended cements containing illitic calcined clays were studied. Sulfate attack was studied using the ASTM C1012 expansion test in blended cements containing low and very high C3A portland cements. After one year, calcined clay completely controls the expansion of very high C3A-cement and improves the performance of low C3A-cement. Chloride resistance of concrete mixtures was determined by natural chloride diffusion (ASTM C1556). Addition of calcined illitic clay (25%) refines the pore structure as indicate the MIP analyses improving the resistance to chloride diffusion and increasing the fraction of bound chlorides some part as chloroaluminate. Alkali-silica reaction was studied using the ASTM C441 procedure with 25% calcined clay added to low, medium and high alkalis Portland cements. The illitic calcined clay reduces the expansion of Portland cements due to the consumption of alkali by the pozzolanic reaction as indicate the determination of available alkalis. Also, the alkalis provide from pozzolan does not impairs significantly the expansion of low alkali Portland cement. Illitic calcined clay used as appropriate portland cement replacement improves the performance of cementitious materials due to the pozzolanic reaction that refines the porosity and consumes the calcium hydroxide and the alkalis in the system.
- Materia
-
Ingeniería de los Materiales
Durability
Calcined clays - Nivel de accesibilidad
- acceso abierto
- Condiciones de uso
- http://creativecommons.org/licenses/by/4.0/
- Repositorio
- Institución
- Comisión de Investigaciones Científicas de la Provincia de Buenos Aires
- OAI Identificador
- oai:digital.cic.gba.gob.ar:11746/10943
Ver los metadatos del registro completo
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Durability of blended cements containing illitic calcined claysIrassar, Edgardo FabiánCordoba, GiselaZito, SilvinaRossetti, AgustínRahhal, VivianaFalcone, Darío DanielIngeniería de los MaterialesDurabilityCalcined claysIllitic clays have pozzolanic activity after thermal treatment at 950 ºC causing dehydroxilation and structure collapse to form metastable aluminosilicate associated with large proportion of iron oxides (~7.0%) and alkalis (~5.0%Na2Oeq). In this paper, the performance against sulfate attack, chloride penetration and alkali silica reaction of different blended cements containing illitic calcined clays were studied. Sulfate attack was studied using the ASTM C1012 expansion test in blended cements containing low and very high C3A portland cements. After one year, calcined clay completely controls the expansion of very high C3A-cement and improves the performance of low C3A-cement. Chloride resistance of concrete mixtures was determined by natural chloride diffusion (ASTM C1556). Addition of calcined illitic clay (25%) refines the pore structure as indicate the MIP analyses improving the resistance to chloride diffusion and increasing the fraction of bound chlorides some part as chloroaluminate. Alkali-silica reaction was studied using the ASTM C441 procedure with 25% calcined clay added to low, medium and high alkalis Portland cements. The illitic calcined clay reduces the expansion of Portland cements due to the consumption of alkali by the pozzolanic reaction as indicate the determination of available alkalis. Also, the alkalis provide from pozzolan does not impairs significantly the expansion of low alkali Portland cement. Illitic calcined clay used as appropriate portland cement replacement improves the performance of cementitious materials due to the pozzolanic reaction that refines the porosity and consumes the calcium hydroxide and the alkalis in the system.2019-09info: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/11746/10943enginfo:eu-repo/semantics/openAccesshttp://creativecommons.org/licenses/by/4.0/reponame:CIC Digital (CICBA)instname:Comisión de Investigaciones Científicas de la Provincia de Buenos Airesinstacron:CICBA2025-09-29T13:40:06Zoai:digital.cic.gba.gob.ar:11746/10943Institucionalhttp://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 13:40:06.814CIC Digital (CICBA) - Comisión de Investigaciones Científicas de la Provincia de Buenos Airesfalse |
dc.title.none.fl_str_mv |
Durability of blended cements containing illitic calcined clays |
title |
Durability of blended cements containing illitic calcined clays |
spellingShingle |
Durability of blended cements containing illitic calcined clays Irassar, Edgardo Fabián Ingeniería de los Materiales Durability Calcined clays |
title_short |
Durability of blended cements containing illitic calcined clays |
title_full |
Durability of blended cements containing illitic calcined clays |
title_fullStr |
Durability of blended cements containing illitic calcined clays |
title_full_unstemmed |
Durability of blended cements containing illitic calcined clays |
title_sort |
Durability of blended cements containing illitic calcined clays |
dc.creator.none.fl_str_mv |
Irassar, Edgardo Fabián Cordoba, Gisela Zito, Silvina Rossetti, Agustín Rahhal, Viviana Falcone, Darío Daniel |
author |
Irassar, Edgardo Fabián |
author_facet |
Irassar, Edgardo Fabián Cordoba, Gisela Zito, Silvina Rossetti, Agustín Rahhal, Viviana Falcone, Darío Daniel |
author_role |
author |
author2 |
Cordoba, Gisela Zito, Silvina Rossetti, Agustín Rahhal, Viviana Falcone, Darío Daniel |
author2_role |
author author author author author |
dc.subject.none.fl_str_mv |
Ingeniería de los Materiales Durability Calcined clays |
topic |
Ingeniería de los Materiales Durability Calcined clays |
dc.description.none.fl_txt_mv |
Illitic clays have pozzolanic activity after thermal treatment at 950 ºC causing dehydroxilation and structure collapse to form metastable aluminosilicate associated with large proportion of iron oxides (~7.0%) and alkalis (~5.0%Na2Oeq). In this paper, the performance against sulfate attack, chloride penetration and alkali silica reaction of different blended cements containing illitic calcined clays were studied. Sulfate attack was studied using the ASTM C1012 expansion test in blended cements containing low and very high C3A portland cements. After one year, calcined clay completely controls the expansion of very high C3A-cement and improves the performance of low C3A-cement. Chloride resistance of concrete mixtures was determined by natural chloride diffusion (ASTM C1556). Addition of calcined illitic clay (25%) refines the pore structure as indicate the MIP analyses improving the resistance to chloride diffusion and increasing the fraction of bound chlorides some part as chloroaluminate. Alkali-silica reaction was studied using the ASTM C441 procedure with 25% calcined clay added to low, medium and high alkalis Portland cements. The illitic calcined clay reduces the expansion of Portland cements due to the consumption of alkali by the pozzolanic reaction as indicate the determination of available alkalis. Also, the alkalis provide from pozzolan does not impairs significantly the expansion of low alkali Portland cement. Illitic calcined clay used as appropriate portland cement replacement improves the performance of cementitious materials due to the pozzolanic reaction that refines the porosity and consumes the calcium hydroxide and the alkalis in the system. |
description |
Illitic clays have pozzolanic activity after thermal treatment at 950 ºC causing dehydroxilation and structure collapse to form metastable aluminosilicate associated with large proportion of iron oxides (~7.0%) and alkalis (~5.0%Na2Oeq). In this paper, the performance against sulfate attack, chloride penetration and alkali silica reaction of different blended cements containing illitic calcined clays were studied. Sulfate attack was studied using the ASTM C1012 expansion test in blended cements containing low and very high C3A portland cements. After one year, calcined clay completely controls the expansion of very high C3A-cement and improves the performance of low C3A-cement. Chloride resistance of concrete mixtures was determined by natural chloride diffusion (ASTM C1556). Addition of calcined illitic clay (25%) refines the pore structure as indicate the MIP analyses improving the resistance to chloride diffusion and increasing the fraction of bound chlorides some part as chloroaluminate. Alkali-silica reaction was studied using the ASTM C441 procedure with 25% calcined clay added to low, medium and high alkalis Portland cements. The illitic calcined clay reduces the expansion of Portland cements due to the consumption of alkali by the pozzolanic reaction as indicate the determination of available alkalis. Also, the alkalis provide from pozzolan does not impairs significantly the expansion of low alkali Portland cement. Illitic calcined clay used as appropriate portland cement replacement improves the performance of cementitious materials due to the pozzolanic reaction that refines the porosity and consumes the calcium hydroxide and the alkalis in the system. |
publishDate |
2019 |
dc.date.none.fl_str_mv |
2019-09 |
dc.type.none.fl_str_mv |
info:eu-repo/semantics/conferenceObject info:eu-repo/semantics/publishedVersion http://purl.org/coar/resource_type/c_5794 info:ar-repo/semantics/documentoDeConferencia |
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conferenceObject |
status_str |
publishedVersion |
dc.identifier.none.fl_str_mv |
https://digital.cic.gba.gob.ar/handle/11746/10943 |
url |
https://digital.cic.gba.gob.ar/handle/11746/10943 |
dc.language.none.fl_str_mv |
eng |
language |
eng |
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info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by/4.0/ |
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openAccess |
rights_invalid_str_mv |
http://creativecommons.org/licenses/by/4.0/ |
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application/pdf |
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CIC Digital (CICBA) |
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Comisión de Investigaciones Científicas de la Provincia de Buenos Aires |
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CIC Digital (CICBA) - Comisión de Investigaciones Científicas de la Provincia de Buenos Aires |
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marisa.degiusti@sedici.unlp.edu.ar |
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