Effective use of fibres of various types and material for shotcrete in rock support for tunnels

Large volumes of steel fibre reinforced shotcrete (sprayed concrete) and steel bolts are commonly used to support tunnels in hard rock. This generates a high CO2-footprint which must be reduced in order to decelerate the continuously increasing average temperature worldwide caused by the emissions o...

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Vydáno v:Expanding Underground - Knowledge and Passion to Make a Positive Impact on the World s. 932 - 939
Hlavní autoři: Sjölander, A., Ansell, A., Nordström, E.
Médium: Kapitola
Jazyk:angličtina
Vydáno: United Kingdom CRC Press 2023
Taylor & Francis Group
Vydání:1
Témata:
Geological Strength Index
Cast Beams
Overburden
Basalt Fibres
Synthetic Fibres
Steel Fibres
Post-cracking Performance
ASTM C1550
Residual Flexural Strength
Excavated Rock Mass
Rock Mass
Above Ground
Fibre Types
BIM
BIM Model
Energy Absorption
Required Energy Absorption
Rock Bolts
Shotcrete Mix
Rock Support
EPD
SEM
Steel Rock Bolts
SCL
Fibre Reinforced Shotcrete
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Abstract Large volumes of steel fibre reinforced shotcrete (sprayed concrete) and steel bolts are commonly used to support tunnels in hard rock. This generates a high CO2-footprint which must be reduced in order to decelerate the continuously increasing average temperature worldwide caused by the emissions of greenhouse gases. Thus, alternative design methods and the possibility to use other materials than steel are currently investigated. Work is ongoing on testing the load-bearing capacity of shotcrete reinforced with fibres of steel, basalt and synthetic materials. This also includes a comparison between tests using Round Determinate Panels (RDP) and four-point bending of beams. Moreover, the practical use of RDP testing as a quality control methodology is also investigated in situ. Here, the goal is to identify several shotcrete mixes suitable for use in tunnelling so that the right material and fibre volume can be used in the right place.
AbstractList Large volumes of steel fibre reinforced shotcrete (sprayed concrete) and steel bolts are commonly used to support tunnels in hard rock. This generates a high CO2-footprint which must be reduced in order to decelerate the continuously increasing average temperature worldwide caused by the emissions of greenhouse gases. Thus, alternative design methods and the possibility to use other materials than steel are currently investigated. Work is ongoing on testing the load-bearing capacity of shotcrete reinforced with fibres of steel, basalt and synthetic materials. This also includes a comparison between tests using Round Determinate Panels (RDP) and four-point bending of beams. Moreover, the practical use of RDP testing as a quality control methodology is also investigated in situ. Here, the goal is to identify several shotcrete mixes suitable for use in tunnelling so that the right material and fibre volume can be used in the right place.
Author Nordström, E.
Sjölander, A.
Ansell, A.
Author_xml – sequence: 1
  givenname: A.
  surname: Sjölander
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  organization: KTH Royal Institute of Technology, Divison of Concrete Structures, Stockholm, Sweden
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  givenname: A.
  surname: Ansell
  fullname: Ansell, A.
  organization: KTH Royal Institute of Technology, Divison of Concrete Structures, Stockholm, Sweden
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  givenname: E.
  surname: Nordström
  fullname: Nordström, E.
  organization: KTH Royal Institute of Technology, Divison of Concrete Structures, Stockholm, Sweden
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Edition 1
Editor Marinos, Vassilis P.
Anagnostou, Georgios
Benardos, Andreas
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Keywords Geological Strength Index
Cast Beams
Overburden
Basalt Fibres
Synthetic Fibres
Steel Fibres
Post-cracking Performance
ASTM C1550
Residual Flexural Strength
Excavated Rock Mass
Rock Mass
Above Ground
Fibre Types
BIM
BIM Model
Energy Absorption
Required Energy Absorption
Rock Bolts
Shotcrete Mix
Rock Support
EPD
SEM
Steel Rock Bolts
SCL
Fibre Reinforced Shotcrete
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PublicationSubtitle Proceedings of the ITA-AITES World Tunnel Congress 2023 (WTC 2023), 12-18 May 2023, Athens, Greece
PublicationTitle Expanding Underground - Knowledge and Passion to Make a Positive Impact on the World
PublicationYear 2023
Publisher CRC Press
Taylor & Francis Group
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Snippet Large volumes of steel fibre reinforced shotcrete (sprayed concrete) and steel bolts are commonly used to support tunnels in hard rock. This generates a high...
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Title Effective use of fibres of various types and material for shotcrete in rock support for tunnels
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