Bentomap: Survey of bentonite and tunnel backfill knowledge: State-of-the-art

Elisa Rautioaho, Leena Korkiala-Tanttu

Research output: Book/ReportReport

Abstract

The objective of the state-of-the-art report is to compile the conducted experimental research and THM knowledge for buffer and backfilling materials, bentonite in particular. In addition, the report presents evaluation, scope, limitations and possible deficiencies of the knowledge and creates a wider perspective of the level of the national and international know-how on bentonite and backfilling research. The survey ranges from small scale laboratory tests to the full-scale tests in real deep depository conditions. The focus of the evaluation is on the thermo-hydro-mechanical properties of bentonite and backfill materials: The thermal properties examined are thermal conductivity, specific heat, and the thermal expansion coefficient. The compiled hydraulic property results, on the other hand, pertain to hydraulic conductivity and the water retention curve, and the investigated mechanical properties include strength, deformation, rheological and swelling properties. The presentation of results from the experimental research is followed by discussion and conclusions drawn from both the individual studies and the Bentomap database as a whole.
Original languageEnglish
Place of PublicationEspoo
PublisherVTT Technical Research Centre of Finland
Number of pages121
ISBN (Electronic)978-951-38-7194-9
Publication statusPublished - 2009
MoE publication typeNot Eligible

Publication series

SeriesVTT Working Papers
Number133

Fingerprint

backfill
bentonite
tunnel
mechanical property
thermal expansion
water retention
hydraulic property
thermal conductivity
swelling
hydraulic conductivity
state of the art
evaluation
material

Keywords

  • bentonite
  • buffer
  • backfill
  • thermal properties
  • hydraulic properties
  • mechanical properties
  • laboratory tests
  • radioactive waste disposal

Cite this

Rautioaho, E., & Korkiala-Tanttu, L. (2009). Bentomap: Survey of bentonite and tunnel backfill knowledge: State-of-the-art. Espoo: VTT Technical Research Centre of Finland. VTT Working Papers, No. 133
Rautioaho, Elisa ; Korkiala-Tanttu, Leena. / Bentomap: Survey of bentonite and tunnel backfill knowledge : State-of-the-art. Espoo : VTT Technical Research Centre of Finland, 2009. 121 p. (VTT Working Papers; No. 133).
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Rautioaho, E & Korkiala-Tanttu, L 2009, Bentomap: Survey of bentonite and tunnel backfill knowledge: State-of-the-art. VTT Working Papers, no. 133, VTT Technical Research Centre of Finland, Espoo.

Bentomap: Survey of bentonite and tunnel backfill knowledge : State-of-the-art. / Rautioaho, Elisa; Korkiala-Tanttu, Leena.

Espoo : VTT Technical Research Centre of Finland, 2009. 121 p. (VTT Working Papers; No. 133).

Research output: Book/ReportReport

TY - BOOK

T1 - Bentomap: Survey of bentonite and tunnel backfill knowledge

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AB - The objective of the state-of-the-art report is to compile the conducted experimental research and THM knowledge for buffer and backfilling materials, bentonite in particular. In addition, the report presents evaluation, scope, limitations and possible deficiencies of the knowledge and creates a wider perspective of the level of the national and international know-how on bentonite and backfilling research. The survey ranges from small scale laboratory tests to the full-scale tests in real deep depository conditions. The focus of the evaluation is on the thermo-hydro-mechanical properties of bentonite and backfill materials: The thermal properties examined are thermal conductivity, specific heat, and the thermal expansion coefficient. The compiled hydraulic property results, on the other hand, pertain to hydraulic conductivity and the water retention curve, and the investigated mechanical properties include strength, deformation, rheological and swelling properties. The presentation of results from the experimental research is followed by discussion and conclusions drawn from both the individual studies and the Bentomap database as a whole.

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KW - backfill

KW - thermal properties

KW - hydraulic properties

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M3 - Report

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ER -

Rautioaho E, Korkiala-Tanttu L. Bentomap: Survey of bentonite and tunnel backfill knowledge: State-of-the-art. Espoo: VTT Technical Research Centre of Finland, 2009. 121 p. (VTT Working Papers; No. 133).