Decalcification of activated paper sludge – Fly ash-Portland cement blended pastes in pure water

Decalcification in pure water of ternary Portland cement (TPC) pastes, containing thermally activated paper sludge and fly ash, has been evaluated from the leaching of Ca2+ in pure water at the temperature of 20 C during 90 days. Monitoring of calcium loss showed that the leaching kinetics are contr...

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Detalles Bibliográficos
Autores: Goñi, S., Frías, Moisés, Vigil de la Villa, R., Vegas, Iñigo
Tipo de recurso: artículo
Fecha de publicación:2013
País:España
Institución:Consejo Superior de Investigaciones Científicas (CSIC)
Repositorio:DIGITAL.CSIC. Repositorio Institucional del CSIC
OAI Identifier:oai:digital.csic.es:10261/91924
Acceso en línea:http://hdl.handle.net/10261/91924
Access Level:acceso abierto
Palabra clave:Leaching of calcium
Pure water
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spelling Decalcification of activated paper sludge – Fly ash-Portland cement blended pastes in pure waterGoñi, S.Frías, MoisésVigil de la Villa, R.Vegas, IñigoLeaching of calciumPure waterDecalcification in pure water of ternary Portland cement (TPC) pastes, containing thermally activated paper sludge and fly ash, has been evaluated from the leaching of Ca2+ in pure water at the temperature of 20 C during 90 days. Monitoring of calcium loss showed that the leaching kinetics are controlled by diffusion. The degradation of the material over time is estimated from the calcium effective diffusivity. A similar study of plain ordinary Portland cement (OPC) pastes was carried out for comparison. The results showed lower effective diffusion coefficients of calcium in the case of the TPC pastes. This behaviour is related to its microstructure, which is denser than that of OPC as a result of the pozzolanic activity of both additions.Peer reviewedElsevier201420142013info:eu-repo/semantics/articlehttp://purl.org/coar/resource_type/c_6501http://hdl.handle.net/10261/91924reponame:DIGITAL.CSIC. Repositorio Institucional del CSICinstname:Consejo Superior de Investigaciones Científicas (CSIC)Ingléshttp://dx.doi.org/10.1016/j.cemconcomp.2013.04.002info:eu-repo/semantics/openAccessoai:digital.csic.es:10261/919242026-05-22T06:33:51Z
dc.title.none.fl_str_mv Decalcification of activated paper sludge – Fly ash-Portland cement blended pastes in pure water
title Decalcification of activated paper sludge – Fly ash-Portland cement blended pastes in pure water
spellingShingle Decalcification of activated paper sludge – Fly ash-Portland cement blended pastes in pure water
Goñi, S.
Leaching of calcium
Pure water
title_short Decalcification of activated paper sludge – Fly ash-Portland cement blended pastes in pure water
title_full Decalcification of activated paper sludge – Fly ash-Portland cement blended pastes in pure water
title_fullStr Decalcification of activated paper sludge – Fly ash-Portland cement blended pastes in pure water
title_full_unstemmed Decalcification of activated paper sludge – Fly ash-Portland cement blended pastes in pure water
title_sort Decalcification of activated paper sludge – Fly ash-Portland cement blended pastes in pure water
dc.creator.none.fl_str_mv Goñi, S.
Frías, Moisés
Vigil de la Villa, R.
Vegas, Iñigo
author Goñi, S.
author_facet Goñi, S.
Frías, Moisés
Vigil de la Villa, R.
Vegas, Iñigo
author_role author
author2 Frías, Moisés
Vigil de la Villa, R.
Vegas, Iñigo
author2_role author
author
author
dc.subject.none.fl_str_mv Leaching of calcium
Pure water
topic Leaching of calcium
Pure water
description Decalcification in pure water of ternary Portland cement (TPC) pastes, containing thermally activated paper sludge and fly ash, has been evaluated from the leaching of Ca2+ in pure water at the temperature of 20 C during 90 days. Monitoring of calcium loss showed that the leaching kinetics are controlled by diffusion. The degradation of the material over time is estimated from the calcium effective diffusivity. A similar study of plain ordinary Portland cement (OPC) pastes was carried out for comparison. The results showed lower effective diffusion coefficients of calcium in the case of the TPC pastes. This behaviour is related to its microstructure, which is denser than that of OPC as a result of the pozzolanic activity of both additions.
publishDate 2013
dc.date.none.fl_str_mv 2013
2014
2014
dc.type.none.fl_str_mv info:eu-repo/semantics/article
http://purl.org/coar/resource_type/c_6501
format article
dc.identifier.none.fl_str_mv http://hdl.handle.net/10261/91924
url http://hdl.handle.net/10261/91924
dc.language.none.fl_str_mv Inglés
language_invalid_str_mv Inglés
dc.relation.none.fl_str_mv http://dx.doi.org/10.1016/j.cemconcomp.2013.04.002
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.publisher.none.fl_str_mv Elsevier
publisher.none.fl_str_mv Elsevier
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 15.812455

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