Coal Mining Waste as a Future Eco-Efficient Supplementary Cementing Material: Scientific Aspects

The stockpiling of tailings around coal mines poses a major environmental problem. Nonetheless, this clay mineral (kaolinite)-based waste can be reused as a supplementary cementitious material (recycled metakaolinite) in the manufacture of future eco-efficient cements. This paper explores the most s...

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Detalles Bibliográficos
Autores: Frías, Moisés, García, Rosario, Vigil de la Villa, R., Martínez-Ramírez, S.
Tipo de recurso: artículo
Fecha de publicación:2016
País:España
Institución:Consejo Superior de Investigaciones Científicas (CSIC)
Repositorio:DIGITAL.CSIC. Repositorio Institucional del CSIC
OAI Identifier:oai:digital.csic.es:10261/135412
Acceso en línea:http://hdl.handle.net/10261/135412
Access Level:acceso abierto
Palabra clave:Coal mining waste
mineralogy
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spelling Coal Mining Waste as a Future Eco-Efficient Supplementary Cementing Material: Scientific AspectsFrías, MoisésGarcía, RosarioVigil de la Villa, R.Martínez-Ramírez, S.Coal mining wastemineralogyThe stockpiling of tailings around coal mines poses a major environmental problem. Nonetheless, this clay mineral (kaolinite)-based waste can be reused as a supplementary cementitious material (recycled metakaolinite) in the manufacture of future eco-efficient cements. This paper explores the most significant scientific questions posed in connection with the conversion of this waste into pozzolans, such as the variation in product mineralogy depending on the sintering temperature and its effect on reaction kinetics in the pozzolan/Ca(OH)2 system over a period of 365 days. The findings show that the optimal sintering temperature is 600 ˝C, such that the cementitious properties of the activated product are determined solely by the conversion of kaolinite into metakaolinite and are unaffected by the other clay minerals (micas). The presence of 20% activated coal waste favors the formation of larger amounts of aluminous phases such as C4AH13 and C4AcH12 than in the reference paste and enhances C–S–H gel polymerization.Peer reviewedMultidisciplinary Digital Publishing InstituteConsejo Superior de Investigaciones Científicas [https://ror.org/02gfc7t72]201620162016info:eu-repo/semantics/articlehttp://purl.org/coar/resource_type/c_6501http://hdl.handle.net/10261/135412reponame:DIGITAL.CSIC. Repositorio Institucional del CSICinstname:Consejo Superior de Investigaciones Científicas (CSIC)Ingléshttp://dx.doi.org/10.3390/recycling1020232Síinfo:eu-repo/semantics/openAccessoai:digital.csic.es:10261/1354122026-05-22T06:33:51Z
dc.title.none.fl_str_mv Coal Mining Waste as a Future Eco-Efficient Supplementary Cementing Material: Scientific Aspects
title Coal Mining Waste as a Future Eco-Efficient Supplementary Cementing Material: Scientific Aspects
spellingShingle Coal Mining Waste as a Future Eco-Efficient Supplementary Cementing Material: Scientific Aspects
Frías, Moisés
Coal mining waste
mineralogy
title_short Coal Mining Waste as a Future Eco-Efficient Supplementary Cementing Material: Scientific Aspects
title_full Coal Mining Waste as a Future Eco-Efficient Supplementary Cementing Material: Scientific Aspects
title_fullStr Coal Mining Waste as a Future Eco-Efficient Supplementary Cementing Material: Scientific Aspects
title_full_unstemmed Coal Mining Waste as a Future Eco-Efficient Supplementary Cementing Material: Scientific Aspects
title_sort Coal Mining Waste as a Future Eco-Efficient Supplementary Cementing Material: Scientific Aspects
dc.creator.none.fl_str_mv Frías, Moisés
García, Rosario
Vigil de la Villa, R.
Martínez-Ramírez, S.
author Frías, Moisés
author_facet Frías, Moisés
García, Rosario
Vigil de la Villa, R.
Martínez-Ramírez, S.
author_role author
author2 García, Rosario
Vigil de la Villa, R.
Martínez-Ramírez, S.
author2_role author
author
author
dc.contributor.none.fl_str_mv Consejo Superior de Investigaciones Científicas [https://ror.org/02gfc7t72]
dc.subject.none.fl_str_mv Coal mining waste
mineralogy
topic Coal mining waste
mineralogy
description The stockpiling of tailings around coal mines poses a major environmental problem. Nonetheless, this clay mineral (kaolinite)-based waste can be reused as a supplementary cementitious material (recycled metakaolinite) in the manufacture of future eco-efficient cements. This paper explores the most significant scientific questions posed in connection with the conversion of this waste into pozzolans, such as the variation in product mineralogy depending on the sintering temperature and its effect on reaction kinetics in the pozzolan/Ca(OH)2 system over a period of 365 days. The findings show that the optimal sintering temperature is 600 ˝C, such that the cementitious properties of the activated product are determined solely by the conversion of kaolinite into metakaolinite and are unaffected by the other clay minerals (micas). The presence of 20% activated coal waste favors the formation of larger amounts of aluminous phases such as C4AH13 and C4AcH12 than in the reference paste and enhances C–S–H gel polymerization.
publishDate 2016
dc.date.none.fl_str_mv 2016
2016
2016
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/10261/135412
url http://hdl.handle.net/10261/135412
dc.language.none.fl_str_mv Inglés
language_invalid_str_mv Inglés
dc.relation.none.fl_str_mv http://dx.doi.org/10.3390/recycling1020232
Sí
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.publisher.none.fl_str_mv Multidisciplinary Digital Publishing Institute
publisher.none.fl_str_mv Multidisciplinary Digital Publishing Institute
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 15,81155

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