Comparison of the condition of steel fiber-reinforced shotcrete with water-glass and alkali-free activators after more than 20 years of service in a subsea road tunnel
The in-service condition of steel fiber-reinforced shotcrete installed more than 20 years ago as single-shell rock support lining in the Nordkapp subsea road tunnel was investigated. The novelty of this study is the comparison of shotcrete with water–glass and alkali-free activators in a saline grou...
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Online Access: | https://hdl.handle.net/11250/3041648 |
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ftngi:oai:ngi.brage.unit.no:11250/3041648 2023-05-15T17:24:26+02:00 Comparison of the condition of steel fiber-reinforced shotcrete with water-glass and alkali-free activators after more than 20 years of service in a subsea road tunnel Manquehual, Cristobal Javier Jakobsen, Pål Drevland Holter, Karl Gunnar De Weerdt, Klaartje Danner, Tobias Alexander Bruland, Amund 2022-04-18 application/pdf https://hdl.handle.net/11250/3041648 eng eng https://hdl.handle.net/11250/3041648 328 Construction and Building Materials 127090 Journal article 2022 ftngi 2023-01-11T23:44:49Z The in-service condition of steel fiber-reinforced shotcrete installed more than 20 years ago as single-shell rock support lining in the Nordkapp subsea road tunnel was investigated. The novelty of this study is the comparison of shotcrete with water–glass and alkali-free activators in a saline groundwater environment. The lowest shotcrete density was obtained at joints between two adjacent shotcrete layers. In the case of alkali-free accelerator, ettringite enrichment was observed in these joints. Leaching appeared to be the main degradation mechanism in the outermost 10–15 cm towards the traffic room. Article in Journal/Newspaper Nordkapp Norwegian Geotechnical Institute (NGI) Digital Archive |
institution |
Open Polar |
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Norwegian Geotechnical Institute (NGI) Digital Archive |
op_collection_id |
ftngi |
language |
English |
description |
The in-service condition of steel fiber-reinforced shotcrete installed more than 20 years ago as single-shell rock support lining in the Nordkapp subsea road tunnel was investigated. The novelty of this study is the comparison of shotcrete with water–glass and alkali-free activators in a saline groundwater environment. The lowest shotcrete density was obtained at joints between two adjacent shotcrete layers. In the case of alkali-free accelerator, ettringite enrichment was observed in these joints. Leaching appeared to be the main degradation mechanism in the outermost 10–15 cm towards the traffic room. |
format |
Article in Journal/Newspaper |
author |
Manquehual, Cristobal Javier Jakobsen, Pål Drevland Holter, Karl Gunnar De Weerdt, Klaartje Danner, Tobias Alexander Bruland, Amund |
spellingShingle |
Manquehual, Cristobal Javier Jakobsen, Pål Drevland Holter, Karl Gunnar De Weerdt, Klaartje Danner, Tobias Alexander Bruland, Amund Comparison of the condition of steel fiber-reinforced shotcrete with water-glass and alkali-free activators after more than 20 years of service in a subsea road tunnel |
author_facet |
Manquehual, Cristobal Javier Jakobsen, Pål Drevland Holter, Karl Gunnar De Weerdt, Klaartje Danner, Tobias Alexander Bruland, Amund |
author_sort |
Manquehual, Cristobal Javier |
title |
Comparison of the condition of steel fiber-reinforced shotcrete with water-glass and alkali-free activators after more than 20 years of service in a subsea road tunnel |
title_short |
Comparison of the condition of steel fiber-reinforced shotcrete with water-glass and alkali-free activators after more than 20 years of service in a subsea road tunnel |
title_full |
Comparison of the condition of steel fiber-reinforced shotcrete with water-glass and alkali-free activators after more than 20 years of service in a subsea road tunnel |
title_fullStr |
Comparison of the condition of steel fiber-reinforced shotcrete with water-glass and alkali-free activators after more than 20 years of service in a subsea road tunnel |
title_full_unstemmed |
Comparison of the condition of steel fiber-reinforced shotcrete with water-glass and alkali-free activators after more than 20 years of service in a subsea road tunnel |
title_sort |
comparison of the condition of steel fiber-reinforced shotcrete with water-glass and alkali-free activators after more than 20 years of service in a subsea road tunnel |
publishDate |
2022 |
url |
https://hdl.handle.net/11250/3041648 |
genre |
Nordkapp |
genre_facet |
Nordkapp |
op_source |
328 Construction and Building Materials 127090 |
op_relation |
https://hdl.handle.net/11250/3041648 |
_version_ |
1766115438747451392 |