Mineral phases and carbon content in weathered fly ashes

Autores
Wirth, X.; Glatstein, D. A.; Burns, S. E.
Año de publicación
2019
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
Fil: Wirth, X. Instituto de Tecnología de Georgia. Escuela de Ingeniería Civil y Ambiental; Estados Unidos.
Fil: Glatstein, D. A. Consejo Nacional de Investigaciones Científicas y Técnicas. Instituto de Estudios Avanzados en Ingeniería y Tecnología; Argentina.
Fil: Burns, S. E. Instituto de Tecnología de Georgia. Escuela de Ingeniería Civil y Ambiental; Estados Unidos.
Historically, fly ash generated in the United States was dry disposed on land or sluiced into ponds for solid/liquid separation, while freshly generated ash was sold for application in concrete. Recent seasonal shortages in the fly ash market have generated interest in beneficial application of the ponded ash as a supplementary cementitious material (SCM); however, exposure to water during disposal and permanent storage has impacted the morphology and geochemistry of the ponded coal fly ash. This study examines the mineral phases and carbon content of 27 samples of weathered fly ash, to determine how weathering changed the ash. Thermogravimetry analysis indicates that weathered fly ashes have hydrated phases that contribute to LOI values over 6% (the maximum limit for ash use as SCMs in concrete). Because these ashes have been exposed to water, a significant percentage of total mass loss is due to mineral volatilization and dehydration during thermal treatment. The general inorganic composition of weathered fly ashes is comparable to unweathered fly ashes, and all weathered ashes met the oxide and fineness requirements of Class F fly ashes. The differences between weathered and unweathered fly ashes are primarily related to differences in morphology and volatile behavior during thermal treatment.
https://linkinghub.elsevier.com/retrieve/pii/S0016236118316430
publishedVersion
Fil: Wirth, X. Instituto de Tecnología de Georgia. Escuela de Ingeniería Civil y Ambiental; Estados Unidos.
Fil: Glatstein, D. A. Consejo Nacional de Investigaciones Científicas y Técnicas. Instituto de Estudios Avanzados en Ingeniería y Tecnología; Argentina.
Fil: Burns, S. E. Instituto de Tecnología de Georgia. Escuela de Ingeniería Civil y Ambiental; Estados Unidos.
Ingeniería del Petróleo, Energía y Combustibles
Materia
Ponded ash
Loss on ignition
Thermogravimetry analysis
Gypsum
Concrete
TECHNOLOGY
Nivel de accesibilidad
acceso abierto
Condiciones de uso
Repositorio
Repositorio Digital Universitario (UNC)
Institución
Universidad Nacional de Córdoba
OAI Identificador
oai:rdu.unc.edu.ar:11086/562473
Acceder
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oai_identifier_str oai:rdu.unc.edu.ar:11086/562473
network_acronym_str RDUUNC
repository_id_str 2572
network_name_str Repositorio Digital Universitario (UNC)
spelling Mineral phases and carbon content in weathered fly ashesWirth, X.Glatstein, D. A.Burns, S. E.Ponded ashLoss on ignitionThermogravimetry analysisGypsumConcreteTECHNOLOGYFil: Wirth, X. Instituto de Tecnología de Georgia. Escuela de Ingeniería Civil y Ambiental; Estados Unidos.Fil: Glatstein, D. A. Consejo Nacional de Investigaciones Científicas y Técnicas. Instituto de Estudios Avanzados en Ingeniería y Tecnología; Argentina.Fil: Burns, S. E. Instituto de Tecnología de Georgia. Escuela de Ingeniería Civil y Ambiental; Estados Unidos.Historically, fly ash generated in the United States was dry disposed on land or sluiced into ponds for solid/liquid separation, while freshly generated ash was sold for application in concrete. Recent seasonal shortages in the fly ash market have generated interest in beneficial application of the ponded ash as a supplementary cementitious material (SCM); however, exposure to water during disposal and permanent storage has impacted the morphology and geochemistry of the ponded coal fly ash. This study examines the mineral phases and carbon content of 27 samples of weathered fly ash, to determine how weathering changed the ash. Thermogravimetry analysis indicates that weathered fly ashes have hydrated phases that contribute to LOI values over 6% (the maximum limit for ash use as SCMs in concrete). Because these ashes have been exposed to water, a significant percentage of total mass loss is due to mineral volatilization and dehydration during thermal treatment. The general inorganic composition of weathered fly ashes is comparable to unweathered fly ashes, and all weathered ashes met the oxide and fineness requirements of Class F fly ashes. The differences between weathered and unweathered fly ashes are primarily related to differences in morphology and volatile behavior during thermal treatment.https://linkinghub.elsevier.com/retrieve/pii/S0016236118316430publishedVersionFil: Wirth, X. Instituto de Tecnología de Georgia. Escuela de Ingeniería Civil y Ambiental; Estados Unidos.Fil: Glatstein, D. A. Consejo Nacional de Investigaciones Científicas y Técnicas. Instituto de Estudios Avanzados en Ingeniería y Tecnología; Argentina.Fil: Burns, S. E. Instituto de Tecnología de Georgia. Escuela de Ingeniería Civil y Ambiental; Estados Unidos.Ingeniería del Petróleo, Energía y Combustibles2019info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdf0016-2361http://hdl.handle.net/11086/562473enginfo:eu-repo/semantics/openAccessreponame:Repositorio Digital Universitario (UNC)instname:Universidad Nacional de Córdobainstacron:UNC2026-10-01T10:18:44Zoai:rdu.unc.edu.ar:11086/562473Institucionalhttps://rdu.unc.edu.ar/Universidad públicaNo correspondehttp://rdu.unc.edu.ar/oai/snrdoca.unc@gmail.comArgentinaNo correspondeNo correspondeNo correspondeopendoar:25722026-10-01 10:18:45.933Repositorio Digital Universitario (UNC) - Universidad Nacional de Córdobafalse
dc.title.none.fl_str_mv Mineral phases and carbon content in weathered fly ashes
title Mineral phases and carbon content in weathered fly ashes
spellingShingle Mineral phases and carbon content in weathered fly ashes
Wirth, X.
Ponded ash
Loss on ignition
Thermogravimetry analysis
Gypsum
Concrete
TECHNOLOGY
title_short Mineral phases and carbon content in weathered fly ashes
title_full Mineral phases and carbon content in weathered fly ashes
title_fullStr Mineral phases and carbon content in weathered fly ashes
title_full_unstemmed Mineral phases and carbon content in weathered fly ashes
title_sort Mineral phases and carbon content in weathered fly ashes
dc.creator.none.fl_str_mv Wirth, X.
Glatstein, D. A.
Burns, S. E.
author Wirth, X.
author_facet Wirth, X.
Glatstein, D. A.
Burns, S. E.
author_role author
author2 Glatstein, D. A.
Burns, S. E.
author2_role author
author
dc.subject.none.fl_str_mv Ponded ash
Loss on ignition
Thermogravimetry analysis
Gypsum
Concrete
TECHNOLOGY
topic Ponded ash
Loss on ignition
Thermogravimetry analysis
Gypsum
Concrete
TECHNOLOGY
dc.description.none.fl_txt_mv Fil: Wirth, X. Instituto de Tecnología de Georgia. Escuela de Ingeniería Civil y Ambiental; Estados Unidos.
Fil: Glatstein, D. A. Consejo Nacional de Investigaciones Científicas y Técnicas. Instituto de Estudios Avanzados en Ingeniería y Tecnología; Argentina.
Fil: Burns, S. E. Instituto de Tecnología de Georgia. Escuela de Ingeniería Civil y Ambiental; Estados Unidos.
Historically, fly ash generated in the United States was dry disposed on land or sluiced into ponds for solid/liquid separation, while freshly generated ash was sold for application in concrete. Recent seasonal shortages in the fly ash market have generated interest in beneficial application of the ponded ash as a supplementary cementitious material (SCM); however, exposure to water during disposal and permanent storage has impacted the morphology and geochemistry of the ponded coal fly ash. This study examines the mineral phases and carbon content of 27 samples of weathered fly ash, to determine how weathering changed the ash. Thermogravimetry analysis indicates that weathered fly ashes have hydrated phases that contribute to LOI values over 6% (the maximum limit for ash use as SCMs in concrete). Because these ashes have been exposed to water, a significant percentage of total mass loss is due to mineral volatilization and dehydration during thermal treatment. The general inorganic composition of weathered fly ashes is comparable to unweathered fly ashes, and all weathered ashes met the oxide and fineness requirements of Class F fly ashes. The differences between weathered and unweathered fly ashes are primarily related to differences in morphology and volatile behavior during thermal treatment.
https://linkinghub.elsevier.com/retrieve/pii/S0016236118316430
publishedVersion
Fil: Wirth, X. Instituto de Tecnología de Georgia. Escuela de Ingeniería Civil y Ambiental; Estados Unidos.
Fil: Glatstein, D. A. Consejo Nacional de Investigaciones Científicas y Técnicas. Instituto de Estudios Avanzados en Ingeniería y Tecnología; Argentina.
Fil: Burns, S. E. Instituto de Tecnología de Georgia. Escuela de Ingeniería Civil y Ambiental; Estados Unidos.
Ingeniería del Petróleo, Energía y Combustibles
description Fil: Wirth, X. Instituto de Tecnología de Georgia. Escuela de Ingeniería Civil y Ambiental; Estados Unidos.
publishDate 2019
dc.date.none.fl_str_mv 2019
dc.type.none.fl_str_mv info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
http://purl.org/coar/resource_type/c_6501
info:ar-repo/semantics/articulo
format article
status_str publishedVersion
dc.identifier.none.fl_str_mv 0016-2361
http://hdl.handle.net/11086/562473
identifier_str_mv 0016-2361
url http://hdl.handle.net/11086/562473
dc.language.none.fl_str_mv eng
language eng
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv application/pdf
dc.source.none.fl_str_mv reponame:Repositorio Digital Universitario (UNC)
instname:Universidad Nacional de Córdoba
instacron:UNC
reponame_str Repositorio Digital Universitario (UNC)
collection Repositorio Digital Universitario (UNC)
instname_str Universidad Nacional de Córdoba
instacron_str UNC
institution UNC
repository.name.fl_str_mv Repositorio Digital Universitario (UNC) - Universidad Nacional de Córdoba
repository.mail.fl_str_mv oca.unc@gmail.com
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score 12.854657

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