Coal ash Portland cement mortars sulphate resistance

Coal fly ash (CFA), coal bottom ash (CBA) are residues produced in thermo-electrical power stations as result of the coal combustion in the same boiler. Therefore, some characteristics of the coal fly ash (CFA) are comparable with those of the coal bottom ash (CBA). Nevertheless, coal bottom ash siz...

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Bibliographic Details
Authors: Menéndez, Esperanza, Argiz, Cristina, Sanjuán, Miguel Ángel
Format: article
Status:Published version
Publication Date:2021
Country:España
Institution:Consejo Superior de Investigaciones Científicas (CSIC)
Repository:DIGITAL.CSIC. Repositorio Institucional del CSIC
OAI Identifier:oai:digital.csic.es:10261/258481
Online Access:http://hdl.handle.net/10261/258481
Access Level:Open access
Keyword:Mortars
Sulphate Resistance
Durability
Coal Ash
Portland Cement
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network_acronym_str ES
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repository_id_str
spelling Coal ash Portland cement mortars sulphate resistanceMenéndez, EsperanzaArgiz, CristinaSanjuán, Miguel ÁngelMortarsSulphate ResistanceDurabilityCoal AshPortland CementCoal fly ash (CFA), coal bottom ash (CBA) are residues produced in thermo-electrical power stations as result of the coal combustion in the same boiler. Therefore, some characteristics of the coal fly ash (CFA) are comparable with those of the coal bottom ash (CBA). Nevertheless, coal bottom ash size is larger than coal fly ash one. Consequently, it was found that it is necessary to grind the coal bottom ash (CBA) to reach a similar size to that one of the CFA. The objective of this paper is to evaluate the performance of Portland cement mortars made with coal fly ash (CFA), coal bottom ash (CBA) or mixes (CFA+CBA), against sulphate attack. The methodology is based on the expansion of slender bars submerged in a sodium sulphate solution (5%) according to the ASTM C-1012/C1012-13 standard. It has been found that mortars elaborated with CEM I 42.5 N (without ashes) presented the largest expansion (0.09%) after a testing period of 330 days. Mortars made with CEM II/A-V exhibited lower expansion (0.03%). Summing up, it can be established that mortar expansion decreases when the coal ash amount increases, independently of the type of coal ash employed. The novelty of this paper relies on the comparison between the performances of Portland cement mortars made with coal fly ash (CFA) or coal bottom ash (CBA) exposed to external sulphate attack.This research was funded by the CSIC (Intramurales Projects PIE 201660E054 y PIE 202060E176).Consejo Superior de Investigaciones Científicas [https://ror.org/02gfc7t72]2022202220212022info:eu-repo/semantics/articlehttp://purl.org/coar/resource_type/c_6501Publisher's versioninfo:eu-repo/semantics/publishedVersionhttp://hdl.handle.net/10261/258481reponame:DIGITAL.CSIC. Repositorio Institucional del CSICinstname:Consejo Superior de Investigaciones Científicas (CSIC)Ingléshttp://dx.doi.org/10.28991/cej-2021-03091640Síinfo:eu-repo/semantics/openAccessoai:digital.csic.es:10261/2584812026-05-22T06:33:51Z
dc.title.none.fl_str_mv Coal ash Portland cement mortars sulphate resistance
title Coal ash Portland cement mortars sulphate resistance
spellingShingle Coal ash Portland cement mortars sulphate resistance
Menéndez, Esperanza
Mortars
Sulphate Resistance
Durability
Coal Ash
Portland Cement
title_short Coal ash Portland cement mortars sulphate resistance
title_full Coal ash Portland cement mortars sulphate resistance
title_fullStr Coal ash Portland cement mortars sulphate resistance
title_full_unstemmed Coal ash Portland cement mortars sulphate resistance
title_sort Coal ash Portland cement mortars sulphate resistance
dc.creator.none.fl_str_mv Menéndez, Esperanza
Argiz, Cristina
Sanjuán, Miguel Ángel
author Menéndez, Esperanza
author_facet Menéndez, Esperanza
Argiz, Cristina
Sanjuán, Miguel Ángel
author_role author
author2 Argiz, Cristina
Sanjuán, Miguel Ángel
author2_role author
author
dc.contributor.none.fl_str_mv Consejo Superior de Investigaciones Científicas [https://ror.org/02gfc7t72]
dc.subject.none.fl_str_mv Mortars
Sulphate Resistance
Durability
Coal Ash
Portland Cement
topic Mortars
Sulphate Resistance
Durability
Coal Ash
Portland Cement
description Coal fly ash (CFA), coal bottom ash (CBA) are residues produced in thermo-electrical power stations as result of the coal combustion in the same boiler. Therefore, some characteristics of the coal fly ash (CFA) are comparable with those of the coal bottom ash (CBA). Nevertheless, coal bottom ash size is larger than coal fly ash one. Consequently, it was found that it is necessary to grind the coal bottom ash (CBA) to reach a similar size to that one of the CFA. The objective of this paper is to evaluate the performance of Portland cement mortars made with coal fly ash (CFA), coal bottom ash (CBA) or mixes (CFA+CBA), against sulphate attack. The methodology is based on the expansion of slender bars submerged in a sodium sulphate solution (5%) according to the ASTM C-1012/C1012-13 standard. It has been found that mortars elaborated with CEM I 42.5 N (without ashes) presented the largest expansion (0.09%) after a testing period of 330 days. Mortars made with CEM II/A-V exhibited lower expansion (0.03%). Summing up, it can be established that mortar expansion decreases when the coal ash amount increases, independently of the type of coal ash employed. The novelty of this paper relies on the comparison between the performances of Portland cement mortars made with coal fly ash (CFA) or coal bottom ash (CBA) exposed to external sulphate attack.
publishDate 2021
dc.date.none.fl_str_mv 2021
2022
2022
2022
dc.type.none.fl_str_mv info:eu-repo/semantics/article
http://purl.org/coar/resource_type/c_6501
Publisher's version
info:eu-repo/semantics/publishedVersion
format article
status_str publishedVersion
dc.identifier.none.fl_str_mv http://hdl.handle.net/10261/258481
url http://hdl.handle.net/10261/258481
dc.language.none.fl_str_mv Inglés
language_invalid_str_mv Inglés
dc.relation.none.fl_str_mv http://dx.doi.org/10.28991/cej-2021-03091640
Sí
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.source.none.fl_str_mv reponame:DIGITAL.CSIC. Repositorio Institucional del CSIC
instname:Consejo Superior de Investigaciones Científicas (CSIC)
instname_str Consejo Superior de Investigaciones Científicas (CSIC)
reponame_str DIGITAL.CSIC. Repositorio Institucional del CSIC
collection DIGITAL.CSIC. Repositorio Institucional del CSIC
repository.name.fl_str_mv
repository.mail.fl_str_mv
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score 15,812429

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