Mineral phases in metakaolin-portlandite pastes cured 15 years at 60 °C. New data for scientific advancement

One of the problems addressed by the scientific community in connection with cement matrix hydration is the evolution of hydrated phases under certain, primarily temperature-related, curing conditions. Such conditions are of utmost importance when the cement generates metastable hydrated phases that...

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Authors: Frías, M., Vigil de la Villa Mencía, Raquel, Martínez-Ramírez, S., García Giménez, Rosario, Sánchez de Rojas, M. I.
Format: article
Publication Date:2019
Country:España
Institution:Universidad Autónoma de Madrid
Repository:Biblos-e Archivo. Repositorio Institucional de la UAM
Language:English
OAI Identifier:oai:repositorio.uam.es:10486/694714
Online Access:http://hdl.handle.net/10486/694714
https://dx.doi.org/10.1016/j.clay.2019.105368
Access Level:Open access
Keyword:Metakaolinite
Metastable phases
Mineralogical evolution
Pozzolanic reaction
Temperature
Zeolites
Geología
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spelling Mineral phases in metakaolin-portlandite pastes cured 15 years at 60 °C. New data for scientific advancementFrías, M.Vigil de la Villa Mencía, RaquelMartínez-Ramírez, S.García Giménez, RosarioSánchez de Rojas, M. I.MetakaoliniteMetastable phasesMineralogical evolutionPozzolanic reactionTemperatureZeolitesGeologíaOne of the problems addressed by the scientific community in connection with cement matrix hydration is the evolution of hydrated phases under certain, primarily temperature-related, curing conditions. Such conditions are of utmost importance when the cement generates metastable hydrated phases that develop into stable phases, inducing substantial physical-mechanical changes in the matrix. One such instance arises during the pozzolanic reaction between metakaolinite and calcium hydroxide at 60 °C when metastable hexagonal phases co-exist with cubic stable phases. Such processes are well understood in the short and medium term (<5 years). Evolution at longer curing times has not been studied, however. This paper describes the evolution of the initial (stable and metastable) mineral phases in the metakaolinite / Ca(OH) reaction toward a zeolite-like phase after 15 year curing at 60 °C. An understanding of such mineralogical changes is scientifically significant, given their direct impact on the engineering properties of cement-based matricesThe authors thank the Spanish Ministry of Science, Innovation and Universities and the European Regional Development Fund (ref: RTI2018-097074-B-C21/C22)Elsevier B.V.Departamento de Geología y GeoquímicaFacultad de Ciencias20192019-11-16research articlehttp://purl.org/coar/resource_type/c_2df8fbb1AMhttp://purl.org/coar/version/c_ab4af688f83e57aainfo:eu-repo/semantics/articleapplication/pdfhttp://hdl.handle.net/10486/694714https://dx.doi.org/10.1016/j.clay.2019.105368reponame:Biblos-e Archivo. Repositorio Institucional de la UAMinstname:Universidad Autónoma de MadridInglésengopen accesshttp://purl.org/coar/access_right/c_abf2info:eu-repo/semantics/openAccessoai:repositorio.uam.es:10486/6947142026-06-23T12:46:27Z
dc.title.none.fl_str_mv Mineral phases in metakaolin-portlandite pastes cured 15 years at 60 °C. New data for scientific advancement
title Mineral phases in metakaolin-portlandite pastes cured 15 years at 60 °C. New data for scientific advancement
spellingShingle Mineral phases in metakaolin-portlandite pastes cured 15 years at 60 °C. New data for scientific advancement
Frías, M.
Metakaolinite
Metastable phases
Mineralogical evolution
Pozzolanic reaction
Temperature
Zeolites
Geología
title_short Mineral phases in metakaolin-portlandite pastes cured 15 years at 60 °C. New data for scientific advancement
title_full Mineral phases in metakaolin-portlandite pastes cured 15 years at 60 °C. New data for scientific advancement
title_fullStr Mineral phases in metakaolin-portlandite pastes cured 15 years at 60 °C. New data for scientific advancement
title_full_unstemmed Mineral phases in metakaolin-portlandite pastes cured 15 years at 60 °C. New data for scientific advancement
title_sort Mineral phases in metakaolin-portlandite pastes cured 15 years at 60 °C. New data for scientific advancement
dc.creator.none.fl_str_mv Frías, M.
Vigil de la Villa Mencía, Raquel
Martínez-Ramírez, S.
García Giménez, Rosario
Sánchez de Rojas, M. I.
author Frías, M.
author_facet Frías, M.
Vigil de la Villa Mencía, Raquel
Martínez-Ramírez, S.
García Giménez, Rosario
Sánchez de Rojas, M. I.
author_role author
author2 Vigil de la Villa Mencía, Raquel
Martínez-Ramírez, S.
García Giménez, Rosario
Sánchez de Rojas, M. I.
author2_role author
author
author
author
dc.contributor.none.fl_str_mv Departamento de Geología y Geoquímica
Facultad de Ciencias
dc.subject.none.fl_str_mv Metakaolinite
Metastable phases
Mineralogical evolution
Pozzolanic reaction
Temperature
Zeolites
Geología
topic Metakaolinite
Metastable phases
Mineralogical evolution
Pozzolanic reaction
Temperature
Zeolites
Geología
description One of the problems addressed by the scientific community in connection with cement matrix hydration is the evolution of hydrated phases under certain, primarily temperature-related, curing conditions. Such conditions are of utmost importance when the cement generates metastable hydrated phases that develop into stable phases, inducing substantial physical-mechanical changes in the matrix. One such instance arises during the pozzolanic reaction between metakaolinite and calcium hydroxide at 60 °C when metastable hexagonal phases co-exist with cubic stable phases. Such processes are well understood in the short and medium term (<5 years). Evolution at longer curing times has not been studied, however. This paper describes the evolution of the initial (stable and metastable) mineral phases in the metakaolinite / Ca(OH) reaction toward a zeolite-like phase after 15 year curing at 60 °C. An understanding of such mineralogical changes is scientifically significant, given their direct impact on the engineering properties of cement-based matrices
publishDate 2019
dc.date.none.fl_str_mv 2019
2019-11-16
dc.type.none.fl_str_mv research article
http://purl.org/coar/resource_type/c_2df8fbb1
AM
http://purl.org/coar/version/c_ab4af688f83e57aa
dc.type.openaire.fl_str_mv info:eu-repo/semantics/article
format article
dc.identifier.none.fl_str_mv http://hdl.handle.net/10486/694714
https://dx.doi.org/10.1016/j.clay.2019.105368
url http://hdl.handle.net/10486/694714
https://dx.doi.org/10.1016/j.clay.2019.105368
dc.language.none.fl_str_mv Inglés
eng
language_invalid_str_mv Inglés
language eng
dc.rights.none.fl_str_mv open access
http://purl.org/coar/access_right/c_abf2
dc.rights.openaire.fl_str_mv info:eu-repo/semantics/openAccess
rights_invalid_str_mv open access
http://purl.org/coar/access_right/c_abf2
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv application/pdf
dc.publisher.none.fl_str_mv Elsevier B.V.
publisher.none.fl_str_mv Elsevier B.V.
dc.source.none.fl_str_mv reponame:Biblos-e Archivo. Repositorio Institucional de la UAM
instname:Universidad Autónoma de Madrid
instname_str Universidad Autónoma de Madrid
reponame_str Biblos-e Archivo. Repositorio Institucional de la UAM
collection Biblos-e Archivo. Repositorio Institucional de la UAM
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