Formation of C-A-S-H phases from the interaction between concrete or cement and bentonite
Abstract Concrete and bentonite are being considered as engineered barriers for the deep geological disposal of high-level radioactive waste in argillaceous rocks. Three hydrothermal laboratory experiments of different scalable complexity were performed to improve our knowledge of the formation of c...
Ausführliche Beschreibung
Autor*in: |
Fernández, Raúl [verfasserIn] |
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Format: |
Artikel |
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Erschienen: |
2016 |
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Anmerkung: |
© 2016 by Walter de Gruyter Berlin/Boston |
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Übergeordnetes Werk: |
Enthalten in: Clay minerals - Mineralogical Society, 1965, 51(2016), 2 vom: 01. Mai, Seite 223-235 |
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Übergeordnetes Werk: |
volume:51 ; year:2016 ; number:2 ; day:01 ; month:05 ; pages:223-235 |
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DOI / URN: |
10.1180/claymin.2016.051.2.09 |
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Katalog-ID: |
OLC2138541126 |
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520 | |a Abstract Concrete and bentonite are being considered as engineered barriers for the deep geological disposal of high-level radioactive waste in argillaceous rocks. Three hydrothermal laboratory experiments of different scalable complexity were performed to improve our knowledge of the formation of calcium aluminate silicate hydrates (C-A-S-H) at the interface between the two materials: concretebentonite transport columns, lime mortar-bentonite transport columns and a portlandite- (bentonite and montmorillonite) batch experiment. Precipitation of C-A-S-H was observed in all experiments. Acicular and fibrous morphologies with certain laminar characteristics were observed which had smaller Ca/Si and larger Al/Si ratios with increasing temperature and lack of accessory minerals. The compositional fields of these C-A-S-H phases formed in the experiments are consistent with Al/(Si+Al) ratios of 0.2- 0.3 described in the literature. The most representative calcium silicate hydrate (C-S-H) phase from the montmorillonite-cement interface is Al-tobermorite. Structural analyses revealed a potential intercalation or association of montmorillonite and C-A-S-H phases at the pore scale. | ||
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10.1180/claymin.2016.051.2.09 doi (DE-627)OLC2138541126 (DE-B1597)claymin.2016.051.2.09-p DE-627 ger DE-627 rakwb 000 550 VZ 13 ssgn Fernández, Raúl verfasserin aut Formation of C-A-S-H phases from the interaction between concrete or cement and bentonite 2016 Text txt rdacontent ohne Hilfsmittel zu benutzen n rdamedia Band nc rdacarrier © 2016 by Walter de Gruyter Berlin/Boston Abstract Concrete and bentonite are being considered as engineered barriers for the deep geological disposal of high-level radioactive waste in argillaceous rocks. Three hydrothermal laboratory experiments of different scalable complexity were performed to improve our knowledge of the formation of calcium aluminate silicate hydrates (C-A-S-H) at the interface between the two materials: concretebentonite transport columns, lime mortar-bentonite transport columns and a portlandite- (bentonite and montmorillonite) batch experiment. Precipitation of C-A-S-H was observed in all experiments. Acicular and fibrous morphologies with certain laminar characteristics were observed which had smaller Ca/Si and larger Al/Si ratios with increasing temperature and lack of accessory minerals. The compositional fields of these C-A-S-H phases formed in the experiments are consistent with Al/(Si+Al) ratios of 0.2- 0.3 described in the literature. The most representative calcium silicate hydrate (C-S-H) phase from the montmorillonite-cement interface is Al-tobermorite. Structural analyses revealed a potential intercalation or association of montmorillonite and C-A-S-H phases at the pore scale. Ruiz, Isabel aut Cuevas, Jaime aut Enthalten in Clay minerals Mineralogical Society, 1965 51(2016), 2 vom: 01. Mai, Seite 223-235 (DE-627)130703907 (DE-600)961059-5 (DE-576)016252330 0009-8558 nnns volume:51 year:2016 number:2 day:01 month:05 pages:223-235 https://doi.org/10.1180/claymin.2016.051.2.09 lizenzpflichtig Volltext GBV_USEFLAG_A SYSFLAG_A GBV_OLC SSG-OLC-TEC SSG-OLC-CHE SSG-OLC-GEO SSG-OLC-PHA SSG-OPC-GGO GBV_ILN_70 GBV_ILN_2026 GBV_ILN_4219 AR 51 2016 2 01 05 223-235 |
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10.1180/claymin.2016.051.2.09 doi (DE-627)OLC2138541126 (DE-B1597)claymin.2016.051.2.09-p DE-627 ger DE-627 rakwb 000 550 VZ 13 ssgn Fernández, Raúl verfasserin aut Formation of C-A-S-H phases from the interaction between concrete or cement and bentonite 2016 Text txt rdacontent ohne Hilfsmittel zu benutzen n rdamedia Band nc rdacarrier © 2016 by Walter de Gruyter Berlin/Boston Abstract Concrete and bentonite are being considered as engineered barriers for the deep geological disposal of high-level radioactive waste in argillaceous rocks. Three hydrothermal laboratory experiments of different scalable complexity were performed to improve our knowledge of the formation of calcium aluminate silicate hydrates (C-A-S-H) at the interface between the two materials: concretebentonite transport columns, lime mortar-bentonite transport columns and a portlandite- (bentonite and montmorillonite) batch experiment. Precipitation of C-A-S-H was observed in all experiments. Acicular and fibrous morphologies with certain laminar characteristics were observed which had smaller Ca/Si and larger Al/Si ratios with increasing temperature and lack of accessory minerals. The compositional fields of these C-A-S-H phases formed in the experiments are consistent with Al/(Si+Al) ratios of 0.2- 0.3 described in the literature. The most representative calcium silicate hydrate (C-S-H) phase from the montmorillonite-cement interface is Al-tobermorite. Structural analyses revealed a potential intercalation or association of montmorillonite and C-A-S-H phases at the pore scale. Ruiz, Isabel aut Cuevas, Jaime aut Enthalten in Clay minerals Mineralogical Society, 1965 51(2016), 2 vom: 01. Mai, Seite 223-235 (DE-627)130703907 (DE-600)961059-5 (DE-576)016252330 0009-8558 nnns volume:51 year:2016 number:2 day:01 month:05 pages:223-235 https://doi.org/10.1180/claymin.2016.051.2.09 lizenzpflichtig Volltext GBV_USEFLAG_A SYSFLAG_A GBV_OLC SSG-OLC-TEC SSG-OLC-CHE SSG-OLC-GEO SSG-OLC-PHA SSG-OPC-GGO GBV_ILN_70 GBV_ILN_2026 GBV_ILN_4219 AR 51 2016 2 01 05 223-235 |
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10.1180/claymin.2016.051.2.09 doi (DE-627)OLC2138541126 (DE-B1597)claymin.2016.051.2.09-p DE-627 ger DE-627 rakwb 000 550 VZ 13 ssgn Fernández, Raúl verfasserin aut Formation of C-A-S-H phases from the interaction between concrete or cement and bentonite 2016 Text txt rdacontent ohne Hilfsmittel zu benutzen n rdamedia Band nc rdacarrier © 2016 by Walter de Gruyter Berlin/Boston Abstract Concrete and bentonite are being considered as engineered barriers for the deep geological disposal of high-level radioactive waste in argillaceous rocks. Three hydrothermal laboratory experiments of different scalable complexity were performed to improve our knowledge of the formation of calcium aluminate silicate hydrates (C-A-S-H) at the interface between the two materials: concretebentonite transport columns, lime mortar-bentonite transport columns and a portlandite- (bentonite and montmorillonite) batch experiment. Precipitation of C-A-S-H was observed in all experiments. Acicular and fibrous morphologies with certain laminar characteristics were observed which had smaller Ca/Si and larger Al/Si ratios with increasing temperature and lack of accessory minerals. The compositional fields of these C-A-S-H phases formed in the experiments are consistent with Al/(Si+Al) ratios of 0.2- 0.3 described in the literature. The most representative calcium silicate hydrate (C-S-H) phase from the montmorillonite-cement interface is Al-tobermorite. Structural analyses revealed a potential intercalation or association of montmorillonite and C-A-S-H phases at the pore scale. Ruiz, Isabel aut Cuevas, Jaime aut Enthalten in Clay minerals Mineralogical Society, 1965 51(2016), 2 vom: 01. Mai, Seite 223-235 (DE-627)130703907 (DE-600)961059-5 (DE-576)016252330 0009-8558 nnns volume:51 year:2016 number:2 day:01 month:05 pages:223-235 https://doi.org/10.1180/claymin.2016.051.2.09 lizenzpflichtig Volltext GBV_USEFLAG_A SYSFLAG_A GBV_OLC SSG-OLC-TEC SSG-OLC-CHE SSG-OLC-GEO SSG-OLC-PHA SSG-OPC-GGO GBV_ILN_70 GBV_ILN_2026 GBV_ILN_4219 AR 51 2016 2 01 05 223-235 |
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10.1180/claymin.2016.051.2.09 doi (DE-627)OLC2138541126 (DE-B1597)claymin.2016.051.2.09-p DE-627 ger DE-627 rakwb 000 550 VZ 13 ssgn Fernández, Raúl verfasserin aut Formation of C-A-S-H phases from the interaction between concrete or cement and bentonite 2016 Text txt rdacontent ohne Hilfsmittel zu benutzen n rdamedia Band nc rdacarrier © 2016 by Walter de Gruyter Berlin/Boston Abstract Concrete and bentonite are being considered as engineered barriers for the deep geological disposal of high-level radioactive waste in argillaceous rocks. Three hydrothermal laboratory experiments of different scalable complexity were performed to improve our knowledge of the formation of calcium aluminate silicate hydrates (C-A-S-H) at the interface between the two materials: concretebentonite transport columns, lime mortar-bentonite transport columns and a portlandite- (bentonite and montmorillonite) batch experiment. Precipitation of C-A-S-H was observed in all experiments. Acicular and fibrous morphologies with certain laminar characteristics were observed which had smaller Ca/Si and larger Al/Si ratios with increasing temperature and lack of accessory minerals. The compositional fields of these C-A-S-H phases formed in the experiments are consistent with Al/(Si+Al) ratios of 0.2- 0.3 described in the literature. The most representative calcium silicate hydrate (C-S-H) phase from the montmorillonite-cement interface is Al-tobermorite. Structural analyses revealed a potential intercalation or association of montmorillonite and C-A-S-H phases at the pore scale. Ruiz, Isabel aut Cuevas, Jaime aut Enthalten in Clay minerals Mineralogical Society, 1965 51(2016), 2 vom: 01. Mai, Seite 223-235 (DE-627)130703907 (DE-600)961059-5 (DE-576)016252330 0009-8558 nnns volume:51 year:2016 number:2 day:01 month:05 pages:223-235 https://doi.org/10.1180/claymin.2016.051.2.09 lizenzpflichtig Volltext GBV_USEFLAG_A SYSFLAG_A GBV_OLC SSG-OLC-TEC SSG-OLC-CHE SSG-OLC-GEO SSG-OLC-PHA SSG-OPC-GGO GBV_ILN_70 GBV_ILN_2026 GBV_ILN_4219 AR 51 2016 2 01 05 223-235 |
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Formation of C-A-S-H phases from the interaction between concrete or cement and bentonite |
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Abstract Concrete and bentonite are being considered as engineered barriers for the deep geological disposal of high-level radioactive waste in argillaceous rocks. Three hydrothermal laboratory experiments of different scalable complexity were performed to improve our knowledge of the formation of calcium aluminate silicate hydrates (C-A-S-H) at the interface between the two materials: concretebentonite transport columns, lime mortar-bentonite transport columns and a portlandite- (bentonite and montmorillonite) batch experiment. Precipitation of C-A-S-H was observed in all experiments. Acicular and fibrous morphologies with certain laminar characteristics were observed which had smaller Ca/Si and larger Al/Si ratios with increasing temperature and lack of accessory minerals. The compositional fields of these C-A-S-H phases formed in the experiments are consistent with Al/(Si+Al) ratios of 0.2- 0.3 described in the literature. The most representative calcium silicate hydrate (C-S-H) phase from the montmorillonite-cement interface is Al-tobermorite. Structural analyses revealed a potential intercalation or association of montmorillonite and C-A-S-H phases at the pore scale. © 2016 by Walter de Gruyter Berlin/Boston |
abstractGer |
Abstract Concrete and bentonite are being considered as engineered barriers for the deep geological disposal of high-level radioactive waste in argillaceous rocks. Three hydrothermal laboratory experiments of different scalable complexity were performed to improve our knowledge of the formation of calcium aluminate silicate hydrates (C-A-S-H) at the interface between the two materials: concretebentonite transport columns, lime mortar-bentonite transport columns and a portlandite- (bentonite and montmorillonite) batch experiment. Precipitation of C-A-S-H was observed in all experiments. Acicular and fibrous morphologies with certain laminar characteristics were observed which had smaller Ca/Si and larger Al/Si ratios with increasing temperature and lack of accessory minerals. The compositional fields of these C-A-S-H phases formed in the experiments are consistent with Al/(Si+Al) ratios of 0.2- 0.3 described in the literature. The most representative calcium silicate hydrate (C-S-H) phase from the montmorillonite-cement interface is Al-tobermorite. Structural analyses revealed a potential intercalation or association of montmorillonite and C-A-S-H phases at the pore scale. © 2016 by Walter de Gruyter Berlin/Boston |
abstract_unstemmed |
Abstract Concrete and bentonite are being considered as engineered barriers for the deep geological disposal of high-level radioactive waste in argillaceous rocks. Three hydrothermal laboratory experiments of different scalable complexity were performed to improve our knowledge of the formation of calcium aluminate silicate hydrates (C-A-S-H) at the interface between the two materials: concretebentonite transport columns, lime mortar-bentonite transport columns and a portlandite- (bentonite and montmorillonite) batch experiment. Precipitation of C-A-S-H was observed in all experiments. Acicular and fibrous morphologies with certain laminar characteristics were observed which had smaller Ca/Si and larger Al/Si ratios with increasing temperature and lack of accessory minerals. The compositional fields of these C-A-S-H phases formed in the experiments are consistent with Al/(Si+Al) ratios of 0.2- 0.3 described in the literature. The most representative calcium silicate hydrate (C-S-H) phase from the montmorillonite-cement interface is Al-tobermorite. Structural analyses revealed a potential intercalation or association of montmorillonite and C-A-S-H phases at the pore scale. © 2016 by Walter de Gruyter Berlin/Boston |
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container_issue |
2 |
title_short |
Formation of C-A-S-H phases from the interaction between concrete or cement and bentonite |
url |
https://doi.org/10.1180/claymin.2016.051.2.09 |
remote_bool |
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author2 |
Ruiz, Isabel Cuevas, Jaime |
author2Str |
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doi_str |
10.1180/claymin.2016.051.2.09 |
up_date |
2024-07-03T16:55:36.263Z |
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