Artificial precursor for alkaline cements
One of the main challenges for the future development of alkaline cements is the availability of precursors. Traditional precursors (such as coal FA and the BFS) have some limitations concerning quality and quantity (the long term supply is not guaranteed). The progressive closure of coal-fired powe...
| Autores: | , , , , , |
|---|---|
| Tipo de recurso: | artículo |
| Estado: | Versión publicada |
| Fecha de publicación: | 2025 |
| País: | España |
| Institución: | Consejo Superior de Investigaciones Científicas (CSIC) |
| Repositorio: | DIGITAL.CSIC. Repositorio Institucional del CSIC |
| OAI Identifier: | oai:digital.csic.es:10261/397038 |
| Acceso en línea: | http://hdl.handle.net/10261/397038 https://api.elsevier.com/content/abstract/scopus_id/85217697184 |
| Access Level: | acceso abierto |
| Palabra clave: | (N,C)-A-S-H gel Alternative supplementary Cementitious Materials (SCMs) Synthetic precursors Alkaline Cements Geopolymers |
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Artificial precursor for alkaline cementsMartín, P.García-Lodeiro, InésFernández-Carrasco, L.Blanco-Varela, María TeresaPalomo, ÁngelFernández-Jiménez, Ana(N,C)-A-S-H gelAlternative supplementary Cementitious Materials (SCMs)Synthetic precursorsAlkaline CementsGeopolymersOne of the main challenges for the future development of alkaline cements is the availability of precursors. Traditional precursors (such as coal FA and the BFS) have some limitations concerning quality and quantity (the long term supply is not guaranteed). The progressive closure of coal-fired power plants and changes in steel production in many countries exacerbate the problem. The present work addresses the challenge of fabricating an artificial precursor (via thermal treatment) with a chemical composition similar to a type- C fly ash (∼20 % CaO and SiO2/CaO≈ 3 and SiO2/Al2O3 ≈ 3). Three temperatures of synthesis were tested: 1000 °C, 1100 °C and 1250 °C. The precursors obtained after thermal treatment of a mixture of chemicals were activated with a 8 M NaOH solution. The temperature of synthesis obviously affected the degree of vitrification. Nevertheless, it can be said that partially amorphous/vitreous precursors, were produced at 1000 °C, developing good mechanical performance. In all cases, compressive strengths above 20 MPa were obtained, after 1 day curing. In cements made with precursors synthesized at 1000 and 1100 °C (amorphous content <70 %), a (N,C)-A-S-H type gel was formed, as the main product of hydration. However, in those cements made with precursors synthesized at 1250 °C (amorphous content ≥99 %), a mixture of (N)–C-A-S-H and (N,C)-A-S-H gels were observed after the hydration process.This works has been funded by the Spanish Research Agency (AEI), the Spanish Ministry of Science and Innovation and the ERDF (research projects (PID2019-11464RB-100//AEI/10.13039/501100011033, PID2022-138637OB-C31/AEI/10.13039/501100011033/FEDER, UE)), "JIN Projects 2021 PID2020-116738RJ-I00//AEI/10.13039/501100011033. RYC Excellence Contract (RYC2021-032620-I, MCIN/AEI/10.13039/50110001033. The award of the FPI pre-doctoral grant (PRE2020-091909) is also acknowledged. This work has been carried out in the facilities of Instituto Eduardo Torroja de Ciencias de la Construcción (IETcc-CSIC) and the Universidad Carlos III de Madrid (UC3M).Peer reviewedElsevierMinisterio de Ciencia, Innovación y Universidades (España)Agencia Estatal de Investigación (España)García-Lodeiro, Inés [0000-0003-1778-1651]Blanco-Varela, María Teresa [0000-0003-3306-3289]Palomo, Ángel [0000-0002-6964-2269]Fernández-Jiménez, Ana [0000-0002-5721-2923]Fernández-Carrasco, L. [0000-0002-2379-3782]Consejo Superior de Investigaciones Científicas [https://ror.org/02gfc7t72]202520252025info:eu-repo/semantics/articlehttp://purl.org/coar/resource_type/c_dcae04bcPublisher's versioninfo:eu-repo/semantics/publishedVersionapplication/pdfhttp://hdl.handle.net/10261/397038https://api.elsevier.com/content/abstract/scopus_id/85217697184reponame:DIGITAL.CSIC. Repositorio Institucional del CSICinstname:Consejo Superior de Investigaciones Científicas (CSIC)Inglés#PLACEHOLDER_PARENT_METADATA_VALUE##PLACEHOLDER_PARENT_METADATA_VALUE#info:eu-repo/grantAgreement/AEI/Plan Estatal de Investigación Científica y Técnica y de Innovación 2021-2023/PID2022-138637OB-C31info:eu-repo/grantAgreement/AEI/Plan Estatal de Investigación Científica y Técnica y de Innovación 2017-2020/PID2020-116738RJ-I00https://doi.org/10.1016/j.compositesb.2025.112216Síinfo:eu-repo/semantics/openAccessoai:digital.csic.es:10261/3970382026-05-22T06:33:51Z |
| dc.title.none.fl_str_mv |
Artificial precursor for alkaline cements |
| title |
Artificial precursor for alkaline cements |
| spellingShingle |
Artificial precursor for alkaline cements Martín, P. (N,C)-A-S-H gel Alternative supplementary Cementitious Materials (SCMs) Synthetic precursors Alkaline Cements Geopolymers |
| title_short |
Artificial precursor for alkaline cements |
| title_full |
Artificial precursor for alkaline cements |
| title_fullStr |
Artificial precursor for alkaline cements |
| title_full_unstemmed |
Artificial precursor for alkaline cements |
| title_sort |
Artificial precursor for alkaline cements |
| dc.creator.none.fl_str_mv |
Martín, P. García-Lodeiro, Inés Fernández-Carrasco, L. Blanco-Varela, María Teresa Palomo, Ángel Fernández-Jiménez, Ana |
| author |
Martín, P. |
| author_facet |
Martín, P. García-Lodeiro, Inés Fernández-Carrasco, L. Blanco-Varela, María Teresa Palomo, Ángel Fernández-Jiménez, Ana |
| author_role |
author |
| author2 |
García-Lodeiro, Inés Fernández-Carrasco, L. Blanco-Varela, María Teresa Palomo, Ángel Fernández-Jiménez, Ana |
| author2_role |
author author author author author |
| dc.contributor.none.fl_str_mv |
Ministerio de Ciencia, Innovación y Universidades (España) Agencia Estatal de Investigación (España) García-Lodeiro, Inés [0000-0003-1778-1651] Blanco-Varela, María Teresa [0000-0003-3306-3289] Palomo, Ángel [0000-0002-6964-2269] Fernández-Jiménez, Ana [0000-0002-5721-2923] Fernández-Carrasco, L. [0000-0002-2379-3782] Consejo Superior de Investigaciones Científicas [https://ror.org/02gfc7t72] |
| dc.subject.none.fl_str_mv |
(N,C)-A-S-H gel Alternative supplementary Cementitious Materials (SCMs) Synthetic precursors Alkaline Cements Geopolymers |
| topic |
(N,C)-A-S-H gel Alternative supplementary Cementitious Materials (SCMs) Synthetic precursors Alkaline Cements Geopolymers |
| description |
One of the main challenges for the future development of alkaline cements is the availability of precursors. Traditional precursors (such as coal FA and the BFS) have some limitations concerning quality and quantity (the long term supply is not guaranteed). The progressive closure of coal-fired power plants and changes in steel production in many countries exacerbate the problem. The present work addresses the challenge of fabricating an artificial precursor (via thermal treatment) with a chemical composition similar to a type- C fly ash (∼20 % CaO and SiO2/CaO≈ 3 and SiO2/Al2O3 ≈ 3). Three temperatures of synthesis were tested: 1000 °C, 1100 °C and 1250 °C. The precursors obtained after thermal treatment of a mixture of chemicals were activated with a 8 M NaOH solution. The temperature of synthesis obviously affected the degree of vitrification. Nevertheless, it can be said that partially amorphous/vitreous precursors, were produced at 1000 °C, developing good mechanical performance. In all cases, compressive strengths above 20 MPa were obtained, after 1 day curing. In cements made with precursors synthesized at 1000 and 1100 °C (amorphous content <70 %), a (N,C)-A-S-H type gel was formed, as the main product of hydration. However, in those cements made with precursors synthesized at 1250 °C (amorphous content ≥99 %), a mixture of (N)–C-A-S-H and (N,C)-A-S-H gels were observed after the hydration process. |
| publishDate |
2025 |
| dc.date.none.fl_str_mv |
2025 2025 2025 |
| dc.type.none.fl_str_mv |
info:eu-repo/semantics/article http://purl.org/coar/resource_type/c_dcae04bc Publisher's version info:eu-repo/semantics/publishedVersion |
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article |
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publishedVersion |
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http://hdl.handle.net/10261/397038 https://api.elsevier.com/content/abstract/scopus_id/85217697184 |
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http://hdl.handle.net/10261/397038 https://api.elsevier.com/content/abstract/scopus_id/85217697184 |
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Inglés |
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Inglés |
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#PLACEHOLDER_PARENT_METADATA_VALUE# #PLACEHOLDER_PARENT_METADATA_VALUE# info:eu-repo/grantAgreement/AEI/Plan Estatal de Investigación Científica y Técnica y de Innovación 2021-2023/PID2022-138637OB-C31 info:eu-repo/grantAgreement/AEI/Plan Estatal de Investigación Científica y Técnica y de Innovación 2017-2020/PID2020-116738RJ-I00 https://doi.org/10.1016/j.compositesb.2025.112216 Sí |
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Elsevier |
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Elsevier |
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