An interlaboratory comparison of methods for measuring rock matrix porosity

Kari Rasilainen, Karl-Heinz Hellmuth, Liisa Kivekäs, Avner Melamed, Timo Ruskeeniemi, Marja Siitari-Kauppi, Jussi Timonen, Matti Valkiainen

Research output: Book/ReportReportProfessional

7 Citations (Scopus)

Abstract

An interlaboratory comparison study was conducted for the available Finnish methods of rock matrix porosity measurements. The aim was first to compare different experimental methods for future applications, and second to obtain quality assured data for the needs of matrix diffusion modelling. Three different versions of water immersion techniques, a tracer elution method, a helium gas through-diffusion method, and a C-14-PMMA method were tested. All methods selected for this study were established experimental tools in the respective laboratories, and they had already been individually tested. Rock samples for the study were obtained from a homogeneous granitic drill core section from the natural analogue site at Palmottu. The drill core section was cut into slabs that were expected to be practically identical. The subsamples were then circulated between the different laboratories using a round robin approach. The circulation was possible because all methods were non-destructive, except the C-14-PMMA method, which was always the last method to be applied. The possible effect of drying temperature on the measured porosity was also preliminarily tested. These measurements were done in the order of increasing drying temperature. If drying temperature had an effect on the measured porosity, it should therefore have been seen as a systematic change in the results. Based on the study, it can be concluded that all methods are comparable in their accuracy. The selection of methods for future applications can therefore be based on practical considerations. Drying temperature seemed to have very little effect on the measured porosity, but a more detailed study is needed for definite conclusions.
Original languageEnglish
Place of PublicationEspoo
PublisherVTT Technical Research Centre of Finland
Number of pages50
ISBN (Print)951-38-4971-6
Publication statusPublished - 1996
MoE publication typeNot Eligible

Publication series

NameVTT Tiedotteita - Meddelanden - Research Notes
PublisherVTT
No.1776
ISSN (Print)1235-0605
ISSN (Electronic)1455-0865

Fingerprint

interlaboratory comparison
porosity
matrix
rock
method
measuring
temperature
natural analog
data quality
helium
slab

Keywords

  • measurement
  • methods
  • comparison
  • experimentation
  • laboratories
  • rocks
  • granite
  • porosity
  • drying
  • temperature
  • quality
  • radioactive wastes

Cite this

Rasilainen, K., Hellmuth, K-H., Kivekäs, L., Melamed, A., Ruskeeniemi, T., Siitari-Kauppi, M., ... Valkiainen, M. (1996). An interlaboratory comparison of methods for measuring rock matrix porosity. Espoo: VTT Technical Research Centre of Finland. VTT Tiedotteita - Meddelanden - Research Notes, No. 1776
Rasilainen, Kari ; Hellmuth, Karl-Heinz ; Kivekäs, Liisa ; Melamed, Avner ; Ruskeeniemi, Timo ; Siitari-Kauppi, Marja ; Timonen, Jussi ; Valkiainen, Matti. / An interlaboratory comparison of methods for measuring rock matrix porosity. Espoo : VTT Technical Research Centre of Finland, 1996. 50 p. (VTT Tiedotteita - Meddelanden - Research Notes; No. 1776).
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author = "Kari Rasilainen and Karl-Heinz Hellmuth and Liisa Kivek{\"a}s and Avner Melamed and Timo Ruskeeniemi and Marja Siitari-Kauppi and Jussi Timonen and Matti Valkiainen",
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Rasilainen, K, Hellmuth, K-H, Kivekäs, L, Melamed, A, Ruskeeniemi, T, Siitari-Kauppi, M, Timonen, J & Valkiainen, M 1996, An interlaboratory comparison of methods for measuring rock matrix porosity. VTT Tiedotteita - Meddelanden - Research Notes, no. 1776, VTT Technical Research Centre of Finland, Espoo.

An interlaboratory comparison of methods for measuring rock matrix porosity. / Rasilainen, Kari; Hellmuth, Karl-Heinz; Kivekäs, Liisa; Melamed, Avner; Ruskeeniemi, Timo; Siitari-Kauppi, Marja; Timonen, Jussi; Valkiainen, Matti.

Espoo : VTT Technical Research Centre of Finland, 1996. 50 p. (VTT Tiedotteita - Meddelanden - Research Notes; No. 1776).

Research output: Book/ReportReportProfessional

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AU - Rasilainen, Kari

AU - Hellmuth, Karl-Heinz

AU - Kivekäs, Liisa

AU - Melamed, Avner

AU - Ruskeeniemi, Timo

AU - Siitari-Kauppi, Marja

AU - Timonen, Jussi

AU - Valkiainen, Matti

PY - 1996

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N2 - An interlaboratory comparison study was conducted for the available Finnish methods of rock matrix porosity measurements. The aim was first to compare different experimental methods for future applications, and second to obtain quality assured data for the needs of matrix diffusion modelling. Three different versions of water immersion techniques, a tracer elution method, a helium gas through-diffusion method, and a C-14-PMMA method were tested. All methods selected for this study were established experimental tools in the respective laboratories, and they had already been individually tested. Rock samples for the study were obtained from a homogeneous granitic drill core section from the natural analogue site at Palmottu. The drill core section was cut into slabs that were expected to be practically identical. The subsamples were then circulated between the different laboratories using a round robin approach. The circulation was possible because all methods were non-destructive, except the C-14-PMMA method, which was always the last method to be applied. The possible effect of drying temperature on the measured porosity was also preliminarily tested. These measurements were done in the order of increasing drying temperature. If drying temperature had an effect on the measured porosity, it should therefore have been seen as a systematic change in the results. Based on the study, it can be concluded that all methods are comparable in their accuracy. The selection of methods for future applications can therefore be based on practical considerations. Drying temperature seemed to have very little effect on the measured porosity, but a more detailed study is needed for definite conclusions.

AB - An interlaboratory comparison study was conducted for the available Finnish methods of rock matrix porosity measurements. The aim was first to compare different experimental methods for future applications, and second to obtain quality assured data for the needs of matrix diffusion modelling. Three different versions of water immersion techniques, a tracer elution method, a helium gas through-diffusion method, and a C-14-PMMA method were tested. All methods selected for this study were established experimental tools in the respective laboratories, and they had already been individually tested. Rock samples for the study were obtained from a homogeneous granitic drill core section from the natural analogue site at Palmottu. The drill core section was cut into slabs that were expected to be practically identical. The subsamples were then circulated between the different laboratories using a round robin approach. The circulation was possible because all methods were non-destructive, except the C-14-PMMA method, which was always the last method to be applied. The possible effect of drying temperature on the measured porosity was also preliminarily tested. These measurements were done in the order of increasing drying temperature. If drying temperature had an effect on the measured porosity, it should therefore have been seen as a systematic change in the results. Based on the study, it can be concluded that all methods are comparable in their accuracy. The selection of methods for future applications can therefore be based on practical considerations. Drying temperature seemed to have very little effect on the measured porosity, but a more detailed study is needed for definite conclusions.

KW - measurement

KW - methods

KW - comparison

KW - experimentation

KW - laboratories

KW - rocks

KW - granite

KW - porosity

KW - drying

KW - temperature

KW - quality

KW - radioactive wastes

M3 - Report

SN - 951-38-4971-6

T3 - VTT Tiedotteita - Meddelanden - Research Notes

BT - An interlaboratory comparison of methods for measuring rock matrix porosity

PB - VTT Technical Research Centre of Finland

CY - Espoo

ER -

Rasilainen K, Hellmuth K-H, Kivekäs L, Melamed A, Ruskeeniemi T, Siitari-Kauppi M et al. An interlaboratory comparison of methods for measuring rock matrix porosity. Espoo: VTT Technical Research Centre of Finland, 1996. 50 p. (VTT Tiedotteita - Meddelanden - Research Notes; No. 1776).