Sulfate and alkali-silica performance of blended cements containing illitic calcined clays
- Autores
- Cordoba, Gisela; Rossetti, Agustín; Falcone, Darío Daniel; Irassar, Edgardo Fabián
- Año de publicación
- 2017
- Idioma
- inglés
- Tipo de recurso
- documento de conferencia
- Estado
- versión publicada
- Descripción
- Studies of illitic calcined clays are less developed than that corresponding to kaolinitic clays, but illite is one of the more abundant clayed minerals of the earth’s crust, as occurs in the Center of the Buenos Aires Province (Argentina) where the largest cement factories are located. Illite clays develop pozzolanic properties when they are thermally treated at 950 °C, causing dehydroxilation and collapse of structure to form a metastable or amorphous aluminosilicate. Illitic calcined clays don’t present a significant water demand and the compressive strength of blended cements attains to the corresponding to portland cement at 90 days. It is characterized as slow pozzolana. Illite incorporates certain proportion of reactive alumina and high proportion of alkalis, modifying the pore structure. From durability point of view, the incorporation of illite can affect the sulfate resistance of portland cements or the alkali-silica reaction (ASR). The aim of this paper is to study the behavior of two different illite calcined clay blended cements against chemical attack, like sulfate attack and harmful alkali silica reaction, using the test based on the ASTM C 1012 and ASTM C 441, respectively. For sulfate performance, illite calcined clays was blended with a low C3A in 20% and 40% of weight replacement and a very high C3A cement (white), using a 30% of weight replacement; while a low (Na2Oeq<0.5) and high alkali (Na2Oeq=1.03) cements were used in the ASR-test. After six months, the low and very high C3A cements of both illitic clays shows low expansion in sulfate media (<0.05%) for blended cement without water demand. The ASR-expansion results show that illitic calcined clays reduce considerably the expansion of high alkali cements and it is not harmful to low alkali cement, but long test time results will be conclusive.
- Materia
-
Ingeniería de los Materiales
Sulfates
Calcined clays
Alcali silca reaction - 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:11746/10879
Ver los metadatos del registro completo
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Sulfate and alkali-silica performance of blended cements containing illitic calcined claysCordoba, GiselaRossetti, AgustínFalcone, Darío DanielIrassar, Edgardo FabiánIngeniería de los MaterialesSulfatesCalcined claysAlcali silca reactionStudies of illitic calcined clays are less developed than that corresponding to kaolinitic clays, but illite is one of the more abundant clayed minerals of the earth’s crust, as occurs in the Center of the Buenos Aires Province (Argentina) where the largest cement factories are located. Illite clays develop pozzolanic properties when they are thermally treated at 950 °C, causing dehydroxilation and collapse of structure to form a metastable or amorphous aluminosilicate. Illitic calcined clays don’t present a significant water demand and the compressive strength of blended cements attains to the corresponding to portland cement at 90 days. It is characterized as slow pozzolana. Illite incorporates certain proportion of reactive alumina and high proportion of alkalis, modifying the pore structure. From durability point of view, the incorporation of illite can affect the sulfate resistance of portland cements or the alkali-silica reaction (ASR). The aim of this paper is to study the behavior of two different illite calcined clay blended cements against chemical attack, like sulfate attack and harmful alkali silica reaction, using the test based on the ASTM C 1012 and ASTM C 441, respectively. For sulfate performance, illite calcined clays was blended with a low C3A in 20% and 40% of weight replacement and a very high C3A cement (white), using a 30% of weight replacement; while a low (Na2Oeq&lt;0.5) and high alkali (Na2Oeq=1.03) cements were used in the ASR-test. After six months, the low and very high C3A cements of both illitic clays shows low expansion in sulfate media (&lt;0.05%) for blended cement without water demand. The ASR-expansion results show that illitic calcined clays reduce considerably the expansion of high alkali cements and it is not harmful to low alkali cement, but long test time results will be conclusive.2017-12info: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/11746/10879enginfo: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:CICBA2025-09-29T13:40:00Zoai:digital.cic.gba.gob.ar:11746/10879Institucionalhttp://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 13:40:00.531CIC Digital (CICBA) - Comisión de Investigaciones Científicas de la Provincia de Buenos Airesfalse |
dc.title.none.fl_str_mv |
Sulfate and alkali-silica performance of blended cements containing illitic calcined clays |
title |
Sulfate and alkali-silica performance of blended cements containing illitic calcined clays |
spellingShingle |
Sulfate and alkali-silica performance of blended cements containing illitic calcined clays Cordoba, Gisela Ingeniería de los Materiales Sulfates Calcined clays Alcali silca reaction |
title_short |
Sulfate and alkali-silica performance of blended cements containing illitic calcined clays |
title_full |
Sulfate and alkali-silica performance of blended cements containing illitic calcined clays |
title_fullStr |
Sulfate and alkali-silica performance of blended cements containing illitic calcined clays |
title_full_unstemmed |
Sulfate and alkali-silica performance of blended cements containing illitic calcined clays |
title_sort |
Sulfate and alkali-silica performance of blended cements containing illitic calcined clays |
dc.creator.none.fl_str_mv |
Cordoba, Gisela Rossetti, Agustín Falcone, Darío Daniel Irassar, Edgardo Fabián |
author |
Cordoba, Gisela |
author_facet |
Cordoba, Gisela Rossetti, Agustín Falcone, Darío Daniel Irassar, Edgardo Fabián |
author_role |
author |
author2 |
Rossetti, Agustín Falcone, Darío Daniel Irassar, Edgardo Fabián |
author2_role |
author author author |
dc.subject.none.fl_str_mv |
Ingeniería de los Materiales Sulfates Calcined clays Alcali silca reaction |
topic |
Ingeniería de los Materiales Sulfates Calcined clays Alcali silca reaction |
dc.description.none.fl_txt_mv |
Studies of illitic calcined clays are less developed than that corresponding to kaolinitic clays, but illite is one of the more abundant clayed minerals of the earth’s crust, as occurs in the Center of the Buenos Aires Province (Argentina) where the largest cement factories are located. Illite clays develop pozzolanic properties when they are thermally treated at 950 °C, causing dehydroxilation and collapse of structure to form a metastable or amorphous aluminosilicate. Illitic calcined clays don’t present a significant water demand and the compressive strength of blended cements attains to the corresponding to portland cement at 90 days. It is characterized as slow pozzolana. Illite incorporates certain proportion of reactive alumina and high proportion of alkalis, modifying the pore structure. From durability point of view, the incorporation of illite can affect the sulfate resistance of portland cements or the alkali-silica reaction (ASR). The aim of this paper is to study the behavior of two different illite calcined clay blended cements against chemical attack, like sulfate attack and harmful alkali silica reaction, using the test based on the ASTM C 1012 and ASTM C 441, respectively. For sulfate performance, illite calcined clays was blended with a low C3A in 20% and 40% of weight replacement and a very high C3A cement (white), using a 30% of weight replacement; while a low (Na2Oeq&lt;0.5) and high alkali (Na2Oeq=1.03) cements were used in the ASR-test. After six months, the low and very high C3A cements of both illitic clays shows low expansion in sulfate media (&lt;0.05%) for blended cement without water demand. The ASR-expansion results show that illitic calcined clays reduce considerably the expansion of high alkali cements and it is not harmful to low alkali cement, but long test time results will be conclusive. |
description |
Studies of illitic calcined clays are less developed than that corresponding to kaolinitic clays, but illite is one of the more abundant clayed minerals of the earth’s crust, as occurs in the Center of the Buenos Aires Province (Argentina) where the largest cement factories are located. Illite clays develop pozzolanic properties when they are thermally treated at 950 °C, causing dehydroxilation and collapse of structure to form a metastable or amorphous aluminosilicate. Illitic calcined clays don’t present a significant water demand and the compressive strength of blended cements attains to the corresponding to portland cement at 90 days. It is characterized as slow pozzolana. Illite incorporates certain proportion of reactive alumina and high proportion of alkalis, modifying the pore structure. From durability point of view, the incorporation of illite can affect the sulfate resistance of portland cements or the alkali-silica reaction (ASR). The aim of this paper is to study the behavior of two different illite calcined clay blended cements against chemical attack, like sulfate attack and harmful alkali silica reaction, using the test based on the ASTM C 1012 and ASTM C 441, respectively. For sulfate performance, illite calcined clays was blended with a low C3A in 20% and 40% of weight replacement and a very high C3A cement (white), using a 30% of weight replacement; while a low (Na2Oeq&lt;0.5) and high alkali (Na2Oeq=1.03) cements were used in the ASR-test. After six months, the low and very high C3A cements of both illitic clays shows low expansion in sulfate media (&lt;0.05%) for blended cement without water demand. The ASR-expansion results show that illitic calcined clays reduce considerably the expansion of high alkali cements and it is not harmful to low alkali cement, but long test time results will be conclusive. |
publishDate |
2017 |
dc.date.none.fl_str_mv |
2017-12 |
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 |
format |
conferenceObject |
status_str |
publishedVersion |
dc.identifier.none.fl_str_mv |
https://digital.cic.gba.gob.ar/handle/11746/10879 |
url |
https://digital.cic.gba.gob.ar/handle/11746/10879 |
dc.language.none.fl_str_mv |
eng |
language |
eng |
dc.rights.none.fl_str_mv |
info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by/4.0/ |
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openAccess |
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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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institution |
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repository.name.fl_str_mv |
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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